Tris-HCL buffer is used as a wash solution for negative gram bacteria such as E.coli because it helps to maintain a stable pH during the washing process.
The buffer prevents any changes in the pH of the solution, which could potentially affect the integrity of the bacterial cell walls and interfere with the washing process. Additionally, Tris-HCL buffer is also used to stabilize the proteins in the bacterial cells, which prevent them from being degraded during the washing process. Overall, the use of Tris-HCL buffer helps to ensure that the bacterial cells remain intact and that the washing process is effective.
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A. The liver is more likely than many other organs to develop
cancer. Why?
B. Describe how bone is both flexible and rigid.
A. The liver is more likely than many other organs to develop cancer because the liver is the main organ that filters and removes toxins from the body. The liver is also involved in metabolizing various substances such as drugs, hormones, and nutrients. Exposure to these toxins and metabolites can cause damage to the liver cells, leading to the development of cancer.
B. Bone is both flexible and rigid because it is made up of two types of tissue: cortical bone and cancellous bone. Cortical bone is the dense, hard outer layer of bone that provides strength and support. Cancellous bone, also known as spongy bone, is the more flexible inner layer that helps absorb shock and stress.
The combination of these two types of tissue allows bone to be both rigid and flexible, making it able to withstand stress and pressure while also allowing for movement and flexibility. Additionally, bone is constantly being remodeled by cells called osteoblasts and osteoclasts, which helps maintain its strength and flexibility over time.
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When we mixed species A and a low ph solution, this one survived.
When we mixed species E and a low ph solution, this one did not survived.
When we have Species E and species A and we mixed them in a low ph solution, both survived. What chemical process happened here? how does the Species A change the environment so that species E can survive?
The chemical process that happened here is called buffering.
In this case, species A acted as a buffer, preventing the pH from dropping too low and allowing species E to survive.
Buffering is the process in which a solution resists changes in pH when small amounts of an acid or base are added to it.
Species A likely contains a weak acid or weak base that reacts with the strong acid or base in the low pH solution to maintain a stable pH. This change in the environment allowed species E to survive, even though it could not survive in the low pH solution on its own.
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A 24-year-old astrologer with a history of intravenous drug abuse sees his doctor because he has felt tired and unwell for the past few weeks. He has noticed that his urine is very dark, he feels nauseated, and does not feel like eating, and he has developed right-sided abdominal discomfort. A friend thinks that he looks ‘yellow’. On examination he is tattooed, has yellow sclerae, and is tender in the right upper quadrant of his abdomen. His liver is enlarged, firm and smooth.
The results of investigations including the liver function tests are: AST, 1200 IU/l; ALT, 1000 IU/l; ALP, 100 IU/l; bilirubin, 60 μmol/l.
1. What is the most likely diagnosis and what is the differential diagnosis of a viral hepatitis in this setting?
2. What investigations would you perform?
3. How would you manage this man?
4. What other factors are important regarding the control of infection?
The most likely diagnosis for this 24-year-old astrologer with a history of intravenous drug abuse is acute viral hepatitis. The differential diagnosis includes other forms of hepatitis, such as autoimmune hepatitis, alcoholic hepatitis, and drug-induced hepatitis.
Diagnosis investigationTo further investigate this diagnosis, the following investigations should be performed:
- Hepatitis serology to determine the type of viral hepatitis (A, B, C, etc.)
- Complete blood count (CBC) to assess for anemia or other abnormalities
- Coagulation studies to assess for any bleeding disorders
- Ultrasound or CT scan of the abdomen to assess for any liver abnormalities or evidence of cirrhosis
In terms of management, the main goal is to provide supportive care while the patient's immune system fights off the infection.
This may include:
- Rest and avoiding strenuous activity
- Avoiding alcohol and any medications that may be harmful to the liver
- Providing adequate hydration and nutrition
- Monitoring for any complications, such as liver failure or encephalopathy
Other important factors regarding the control of infection include:
- Ensuring that the patient does not share needles or other drug paraphernalia with others
- Practicing safe sex to prevent the spread of infection to sexual partners
- Avoiding close contact with others who may be at risk for contracting the infection
- Getting vaccinated against other forms of viral hepatitis, if appropriate.
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Some strains of staphylococcus aureus are resistant to modified penicillins e.g. methicillin, flucloxacillin because they are able to:
1) Pump the drug from the cell before it can act
2) Prevent the drug reaching its site of action
3) Infect human cells unaffected by the drug
4) Produce an enzyme unaffected by the drug
The main cell type in our blood that phagocytoses and digests foreign material is the:
1) Erythrocyte
2) Platelet
3) megakarycoyte
4) Neutrophil
5) Lymphocyte
Helicobacter pylori
1) Is not associated with stomach cancer
2) Is a common cause of diarrhoea
3) Is commonly cultured from pus obtained from an infected appendix
4) Is the main cause of duodenal ulcers
5) Shoulder never be treated because it is resistant to all antibiotics
The subset of T lymphocytes that control immune and inflammatory responses is:
1) TCR cells
2) CD4 cells
3) NK cells
4) CD3 cells
5) CD8 cells
T cells that can kill virus infected and cancer cells are identified by which maker?
1) CD8
2) CD4
3) CD3
4) CD1
5) CD20
Multiple choice questions. please answer all questions with the right answer from the options
1) Some strains of staphylococcus aureus are resistant to modified penicillins e.g. methicillin, flucloxacillin because they are able to: 4) Produce an enzyme unaffected by the drug
2) The main cell type in our blood that phagocytoses and digests foreign material is the: 4) Neutrophil
3) Helicobacter pylori: 4) Is the main cause of duodenal ulcers
4) The subset of T lymphocytes that control immune and inflammatory responses is: 2) CD4 cells
5) T cells that can kill virus infected and cancer cells are identified by which marker is: 1) CD8
What's cellThe definition of a cell is the smallest unit of an organism or living thing. The cell is the basic structural and functional unit of organisms, just like the atoms in a chemical structure. Cells can determine the durability of living things.
Substances that make up cells consist of organic and inorganic compounds. The inorganic elements of cells consist of carbon, hydrogen, nitrogen, and oxygen. While organic elements are in the form of complex structures ranging from the nucleus, ribosomes, and others.
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You have expressed a protein of interest in E.coli cells for further study in the lab. The protein has a net positive charge at pH 6, absorbs UV light at 280nm, and has insulin binding activity. Briefly describe a purification scheme with at least three steps that will leverage these properties and generate pure protein.
A three-step purification scheme can be utilized, which includes ion exchange chromatography, affinity chromatography, and size exclusion chromatography to purify the protein of interest based on its net positive charge at pH 6, insulin binding activity, and UV absorption at 280nm.
The purification scheme can be designed based on the unique properties of the protein to achieve high purity and yield.
Here is a possible three-step purification scheme for the given protein of interest:
Overall, this three-step purification scheme is designed to leverage the unique properties of the protein of interest and to remove contaminants stepwise to obtain highly purified protein suitable for further study in the lab.
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How does the juxtaglomerular apparatus affect blood pressure?
The juxtaglomerular apparatus affects blood pressure by producing renin in response to decreased blood pressure or decreased blood flow to the kidney.
The juxtaglomerular apparatus is a complex of specialized cells in the kidney that regulates blood pressure and the filtration rate of the glomerulus. The Juxtaglomerular Apparatus (JGA) is a collection of specialized cells located near the afferent arteriole and distal convoluted tubule junction in the kidney. The JGA's main role is to regulate blood pressure and glomerular filtration rate (GFR).
The juxtaglomerular apparatus is a complex of specialized cells in the kidney that regulates blood pressure and the filtration rate of the glomerulus. The juxtaglomerular apparatus affects blood pressure by producing renin in response to decreased blood pressure or decreased blood flow to the kidney.
Renin is an enzyme that converts angiotensinogen into angiotensin I. Angiotensin I is then converted to angiotensin II by angiotensin-converting enzyme (ACE), which is mainly found in the lungs. Angiotensin II causes vasoconstriction, which raises blood pressure, and stimulates aldosterone secretion, which increases sodium and water retention, also increasing blood pressure.
As a result, the juxtaglomerular apparatus's ability to regulate renin release is crucial for regulating blood pressure.
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About 70% of Americans get a bitter taste from the substance called phenylthiocarbamide (PTC). It is
tasteless to the rest. The "taster" allele is dominant (T) to non-taster (t). Also, normal skin pigmentation is
dominant (N) to albino (n). A normally pigmented woman who is taste-blind for PTC has an albino-taster
father. She marries an albino man who is a taster, though the man's mother is a non-taster. Show the
expected offspring of this couple.
Parents genotype:
Answer: Parent's Genotype: Nntt x nnTt
Explanation:
The woman is first, and the man is second in the equation above.
The woman is heterozygous, with normal pigment because her father had to pass on an albino allele. She is also a homozygous non-taster because the only way you can be one is to have two recessive alleles.
The man is homozygous albino because the only way you can be one is to have two recessive alleles. He is also heterozygous for tasting because his mother had to pass on a non-taster allele.
Possible offspring
[tex]\left[\begin{array}{cccc}NnTt & NnTt & nnTt & nnTt\\NnTt & NnTt & nnTt & nnTt\\Nntt & Nntt & nntt & nntt\\Nntt & Nntt & nntt & nntt\end{array}\right][/tex]
Hope this helps!
what causes the different species to evolve separately of each other if they lived on the same island
Answer:
Each island has a different environment. The differences in in the environment selected different varieties from the possibilities of the DNA in the finches. Also within a given island there are different niches
Explanation:
Write a lab report in the scientific method for the organic molecules experiment. Your purpose is to test samples for the presence of organic molecules. GUARANTEED THUMBS UP PLEASE ANSWER IT PLEASE
The scientific method is a series of steps that scientists use to answer questions and solve problems. In the organic molecules experiment, we are testing samples for the presence of organic molecules.
Lab Report exampleHere is a lab report written in the scientific method for this experiment:
1. Purpose: The purpose of this experiment is to test samples for the presence of organic molecules.
2. Hypothesis: If the samples contain organic molecules, then they will test positive for the presence of organic molecules.
3. Materials: The materials used in this experiment are the samples to be tested, a testing kit, and a lab notebook.
4. Procedure: The procedure for this experiment is as follows: a. Label each sample with a number or letter. b. Use the testing kit to test each sample for the presence of organic molecules. c. Record the results of each test in the lab notebook.
5. Results: The results of this experiment are the observations and data collected during the testing process.
6. Conclusion: The conclusion of this experiment is the answer to the question of whether or not the samples contain organic molecules. This is based on the results of the testing process.
7. Discussion: The discussion of this experiment includes any observations or conclusions that were made during the testing process, as well as any potential sources of error or limitations of the experiment.
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What is the phenotype of the loss of slbo during border cell
migration and explain?
The phenotype of the loss of slbo during border cell migration is a disruption in the migration of border cells during oogenesis, resulting in a failure of the border cells to reach the oocyte.
This can lead to defects in egg chamber development and ultimately, a failure in egg production.
To explain further, slbo is a gene that encodes for the transcription factor Slow Border Cells (Slbo), which is essential for the migration of border cells during oogenesis.
During normal development, border cells detach from the follicle epithelium and migrate through the nurse cells to the oocyte, where they play a crucial role in egg chamber development.
However, when slbo is lost, the border cells fail to properly detach and migrate, leading to defects in egg chamber development and a failure in egg production.
In summary, the loss of slbo during border cell migration leads to a disruption in the migration of border cells, resulting in defects in egg chamber development and a failure in egg production.
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Archaea are composed of ________ cells.
Archaea are composed of ________ cells.
eukaryotic
prokaryotic
bacterial
animal
Archaea are composed of Prokaryotic cells. The correct option is B.
Thus, Any single-celled prokaryotic organism that belongs to the domain Archaea has unique molecular characteristics that set it apart from bacteria, the other, more well-known group of prokaryotes.
It is from eukaryotes, which include organisms like plants and animals and whose cells contain a defined nucleus.
The word archaea comes from the Greek word archaios, which means "ancient" or "primitive," and some archaea do in fact exhibit traits deserving of that description.
Thus, Archaea are composed of Prokaryotic cells. The correct option is B.
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State True or False: Amino acids are the building blocks of protein.
The statement about amino acids are the building blocks of protein is true.
What are amino acids?Аmino аcids аre orgаnic molecules thаt serve аs the building blocks of proteins, which аre the most importаnt biomolecules in living cells. They're аlso essentiаl to а vаriety of physiologicаl processes, including enzyme operаtion, cell signаlling, аnd neurotrаnsmitter synthesis.
Eаch аmino аcid is mаde up of а centrаl cаrbon аtom (C), аn аmino group ([tex]NH_{2}[/tex]), а cаrboxyl group (COOH), аnd а side chаin (R group). Аmino аcids аre linked together viа peptide bonds to form polypeptide chаins, which cаn be folded into а specific three-dimensionаl shаpe to produce а functionаl protein.
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there are some ways that savannas and temperate grasslands are similar and some ways that they are different. Explain the similarities and differences between the two on the lines below.
1. Temperate grassland and savanna have grasses as the predominant plant form.
2. Both temperate grassland and savanna mostly have animals that feed on grass [grazer] as the primary consumers.
Also, the two vegetation are prone to fire incident and both have been impacted by agriculture.
1. Temperate grassland and savanna have grasses as the predominant plant form.
2. Both temperate grassland and savanna mostly have animals that feed on grass [grazer] as the primary consumers.
Also, the two vegetation are prone to fire incidents and both have been impacted by agriculture.
The phrase "vascular plants" indicates plants that:
a. contain xylem and phloem
b. reproduce via seeds
c. rely on osmosis for water transport among their cells
d. grow in moist environments
The phrase "vascular plants" indicates plants that contain xylem and phloem. The correct answer is A.
Xylem and phloem are the two main types of vascular tissue in plants. Xylem is responsible for transporting water and minerals from the roots to the rest of the plant, while phloem is responsible for transporting the products of photosynthesis (sugars) from the leaves to the rest of the plant. Vascular plants, also known as tracheophytes, include ferns, gymnosperms, and angiosperms.
Therefore, the correct answer is option a. contain xylem and phloem. Options b, c, and d are incorrect as they do not accurately describe the defining characteristic of vascular plants.
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You are given 500g of sucrose to make three difference sucrose solutions. For each solution,
calculate how much sucrose (in grams) you would need to create the solution. Sucrose has a
molecular weight of 342.3 g/M.
a. 50ml of a sucrose solution with a concentration of 100 mg/ml
b. 320ml of a sucrose solution at a 15% concentration
c. 100ml of a sucrose solution at a concentration of 150mM.
a. To create 50ml of a sucrose solution with a concentration of 100 mg/ml, you would need 17.11 grams of sucrose. To calculate this, we use the following equation: Molarity = (mass of solute (g) / Molecular Weight (g/M)) / Volume (L)
Plugging in the values:
Molarity = (500/342.3) / 0.05
Molarity = 100 mg/ml
Rearranging the equation for mass:
mass = (Molarity x Molecular Weight (g/M) x Volume (L))
mass = (100 x 342.3 x 0.05)
mass = 17.11 grams
b. To create 320ml of a sucrose solution with a 15% concentration, you would need 49.5 grams of sucrose. To calculate this, we use the following equation:
Molarity = (mass of solute (g) / Molecular Weight (g/M)) / Volume (L)
Plugging in the values:
Molarity = (15/100 x 500/342.3) / 0.320
Molarity = 14.75 mg/ml
Rearranging the equation for mass:
mass = (Molarity x Molecular Weight (g/M) x Volume (L))
mass = (14.75 x 342.3 x 0.320)
mass = 49.5 grams
c. To create 100ml of a sucrose solution with a concentration of 150mM, you would need 50.4 grams of sucrose. To calculate this, we use the following equation:
Molarity = (mass of solute (g) / Molecular Weight (g/M)) / Volume (L)
Plugging in the values:
Molarity = (150/1000 x 500/342.3) / 0.100
Molarity = 15 mg/ml
Rearranging the equation for mass:
mass = (Molarity x Molecular Weight (g/M) x Volume (L))
mass = (15 x 342.3 x 0.100)
mass = 50.4 grams
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An example of a virus that can be transmitted through food is
hepatitis A. true or False?
This statement 'An example of a virus that can be transmitted through food is hepatitis A' is true.
Hepatitis A is a contagious viral disease that affects the liver. The hepatitis A virus (HAV) causes it, and it may result in mild to a severe illness lasting anywhere from a few weeks to many months.
HAV is present in the feces of contaminated persons and can be transmitted to others by contaminated water, food, or objects. Most people who contract hepatitis A recover completely without any long-term consequences. Others, on the other hand, may become very ill and experience complications. This is more prevalent in people who are older or who have an underlying health issue.
The hepatitis A virus can survive for long periods of time in water. In areas where water or sewage systems are deficient, it's more prevalent. Shellfish or other seafood that has been grown in contaminated water sources can also transmit the virus.
Food, particularly uncooked or undercooked meat and shellfish, can be contaminated with hepatitis A. Fruits and vegetables that are grown in contaminated soil and consumed uncooked are also possible sources of infection.
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You're given the following data for the ankle. Based on numerical differentiation with the central difference method, is the ankle moving in dorsiflexion or plantar flexion at 0.3 seconds? Show your work below and explain vour answer (1 mark)
Time(seconds) Relative Ankle Angle(degrees)
0.1
108
0.2 120
0.3 104
0.4 93
Based on numerical differentiation with the central difference method, the ankle is moving in dorsiflexion at 0.3 seconds. To calculate the numerical differentiation, subtract the value of the function at the lower point (t-1) from the value of the function at the higher point (t+1) and divide it by the change in the independent variable (2h).
Therefore, the numerical differentiation of the data at 0.3 seconds is calculated as:
(1040 - 1200) / (0.4 - 0.2) = -160/0.2 = -800.
Dorsiflexion is defined as the movement of the ankle joint in which the foot is moved toward the front of the leg. During dorsiflexion, the foot is lifted toward the shin, with the toes pointing toward the shin and the heel pointing downward. The muscles and tendons involved in dorsiflexion are the tibialis anterior, the extensor hallucis longus, and the extensor digitorum longus. These muscles help lift the ankle and flex the toes.
Dorsiflexion is important for activities such as running, walking, and jumping. It allows us to move our feet in the desired direction, while also providing stability and balance. It also plays an important role in posture and standing balance. By flexing the ankle joint, the muscles and tendons involved can help to maintain an upright posture.
Dorsiflexion also helps protect the knee and hip joints from damage. By dorsiflexing the ankle, the knee and hip joints are better able to absorb shock. This helps reduce the risk of injury to these joints.
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Alternative splicing is...
- only present in prokaryotes
- uncommon and has only been observed for a small percentage of human genes
- the process of selecting different combinations of exons to make distinct protein isoforms
- necessary for all polycistronic RNA transcripts
Alternative splicing is =necessary for all polycistronic RNA transcripts. Rather, alternative splicing is a process in which different combinations of exons are joined together to create multiple mature mRNA transcripts from a single gene. This process allows for the production of different protein isoforms from the same gene, increasing the diversity of the proteome. Polycistronic RNA transcripts, on the other hand, are RNA molecules that contain multiple coding regions, each of which can be translated into a separate protein. While alternative splicing can occur in polycistronic RNA transcripts, it is not necessary for their function.
What is NAD (NAD+) and NADH? Describe them as if you were a
chemist – consider their structures – what do they transfer? Why is
NAD+ needed by all cells no matter what type of metabolism they
use?
NAD, or nicotinamide adenine dinucleotide, is a coenzyme found in all living cells. It is involved in metabolism, or the process of breaking down molecules for energy. NAD+ is the oxidized form of NAD, while NADH is the reduced form.
In terms of structure, NAD+ and NADH are both composed of two nucleotides joined by their phosphate groups. The first nucleotide contains an adenine base, while the second contains a nicotinamide base. The difference between the two forms lies in the presence of an extra hydrogen atom and an extra electron in NADH.
NAD+ is needed by all cells because it plays a crucial role in the electron transport chain, which is the final step in the process of cellular respiration. This is where the majority of ATP, the molecule that provides energy for cellular processes, is produced. Without NAD+, the electron transport chain would not be able to function, and cells would not be able to produce enough energy to survive.
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Compare and contrast infection and replication of Wild-type (WT) Measles virus (MeV) and the MeV Vaccine strain.
The main difference between infection and replication of Wild-type (WT) Measles virus (MeV) and the MeV Vaccine strain is that the WT MeV causes the actual disease, while the MeV Vaccine strain does not.
Comparison and ContrastThe WT MeV infects cells and replicates to produce more virus particles, leading to the symptoms of measles, such as fever, cough, and rash. In contrast, the MeV Vaccine strain is a weakened version of the virus that does not cause disease. It still infects cells and replicates, but to a lesser extent, and does not cause symptoms.
The purpose of the MeV Vaccine strain is to stimulate the immune system to produce antibodies against the virus, without causing the actual disease. This provides immunity to the WT MeV, preventing infection and disease.
In summary, the WT MeV causes disease through infection and replication, while the MeV Vaccine strain does not cause disease, but still stimulates the immune system to provide immunity.
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Hi I am posting this question the second time. The expert didn't finish answering it and sent it to me. I metioned that the answer "smoking" is wrong and "access to healthcare" is wrong. So its either "all choices" or "envionmental conditions" as the correct answer. Please I need the right answer thats my last attempt.
Which would be a determinant for lung cancer survival?
Environmental conditions
Smoking
All choices
Access to health care
The correct answer to this question is "All choices." This is because all of the listed options - environmental conditions, smoking, and access to health care - can all be determinants for lung cancer survival.
Environmental conditions can play a significant role in the development and progression of lung cancer. For example, exposure to air pollution or radon gas can increase an individual's risk of developing lung cancer.
Smoking is a well-known risk factor for lung cancer, and can also impact an individual's chances of survival. Quitting smoking can improve an individual's chances of surviving lung cancer, but it is still a significant determinant.
Access to health care is also a crucial determinant for lung cancer survival. Individuals who have access to quality health care are more likely to receive early detection and treatment for lung cancer, which can greatly improve their chances of survival.
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Help i need to answer this question!! A chef needs to increase the temperature of a food dish. She thinks she can do this by stacking another dish on top of it. She has three dishes to choose from for the top dish: A, B, and C.
Which one of these dishes would make the food dish the warmest when placed on top of it? As part of your answer, explain how the energy and temperature of both the top dish and the food dish will change when the food dish warms up, and why.
Stacking another dish on top of a food dish is not an effective way to increase its temperature, as the dish on top may get slightly warm and the food won't be cooked in less time while the dish at the base will get more temperature.
What is the temperature in cooking?The dish on top may get slightly warm, but it will not be enough to significantly heat up the food dish underneath, and the reason for this is that the transfer of heat from one object to another depends on the temperature difference between them, the surface area of contact, and the thermal conductivity of the materials involved.
Hence, stacking another dish on top of a food dish is not an effective way to increase its temperature, as the dish on top may get slightly warm and the food won't be cooked in less time.
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A 43-year-old woman eats a meal consisting of 70% carbohydrate, 20% protein, and 10% fat. Six hours after consuming the meal, intense peristaltic contractions travel from the stomach to the colon over a period of about 90 minutes. Which of the following hormones is most likely to mediate the intense peristaltic contractions in this woman?A) CholecystokininB) GastrinC) Glucose-dependent insulinotropic peptideD) MotilinE) Secretin
The hormone that is most likely to mediate the intense paristaltic conntcerations in the 43-year-old woman after consuming a meal consisting of 70% carbohydrate, 20% protein, and 10% fat is D) motilin.
This hormone is responsible for regulating the contractions of the smooth muscles in the gastrointestinal tract, which helps to move food through the digestive system. The peristaltic contractions that occur after a meal are a normal part of the digestive process, and are necessary for the proper digestion and absorption of nutrients from the food that is consumed. Therefore, the hormone motilin is the most likely to be involved in the intense peristaltic contractions that occur in this woman after consuming her meal.
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According to the phylogenetic tree, from which domain did Eukarya evolve?
The first branch of the phylogenetic tree holds the species of the bacteria division. It contains thermotoga bacteria, green non sulfur bacteria, cyanobacteria, gram positive bacteria, and purple bacteria. The second branch of the phylogenetic tree holds species of the Eukarya. It contains diplomonads, microsporidia, trichomonads, flagellates, entamoeba, slime molds, ciliates, plants, animals, and fungi. The last branch of the phylogenetic tree starts at the beginning of Eukarya line and holds the species of the Archaea division. It contains Thermococcus, Pyrodictium, Thermoproteus, Methanobacterium, and extreme halophiles.
A. Animals
B. Bacteria
C. Thermotoga
D. Archaea
Eukarya includes all organisms that have cells with nuclei and other complex cellular structures. According to current scientific understanding, the Eukarya domain evolved from the Archaea domain.
What is a phylogenetic tree?A phylogenetic tree is a diagrammatic representation of the evolutionary relationships among different groups of organisms. It depicts the evolutionary history and ancestry of organisms based on their physical or genetic characteristics, such as DNA sequences or morphological features.
The phylogenetic tree suggests that the Archaea domain and the Eukarya domain share a common ancestor, and that the two domains diverged from a common ancestor approximately 2 billion years ago. This hypothesis is supported by genetic and biochemical evidence, which indicates that the two domains share many common features, such as certain metabolic pathways.
It's worth noting that the third domain of life, Bacteria, evolved independently from both Archaea and Eukarya, and represents a distinct evolutionary lineage.
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Answer:
D. Archaea
Explanation:
i got it right on my quiz
What will be the impact of deleting each of these transcription
factors (one at a time) on transcription. Describe your answer.
1. TFIID
2. TFII B
3. TFII H
Deleting any of the transcription factors TFIID, TFII B, or TFII H will lead to a significant decrease in gene expression as they are responsible for recognizing and binding to the TATA box, recruiting RNA polymerase II to the promoter region, and unwinding the DNA double helix, respectively.
The impact of deleting each of these transcription factors one at a time on transcription is as follows:
1. TFIID: Deleting TFIID will have a significant impact on transcription because it is responsible for recognizing and binding to the TATA box, a sequence of DNA that is found in the promoter region of many genes. Without TFIID, RNA polymerase II will not be able to bind to the promoter and initiate transcription, leading to a decrease in gene expression.
2. TFII B: Deleting TFII B will also have a significant impact on transcription because it is responsible for recruiting RNA polymerase II to the promoter region of the gene. Without TFII B, RNA polymerase II will not be able to bind to the promoter and initiate transcription, leading to a decrease in gene expression.
3. TFII H: Deleting TFII H will have a significant impact on transcription because it is responsible for unwinding the DNA double helix, allowing RNA polymerase II to access the template strand and begin transcription. Without TFII H, RNA polymerase II will not be able to access the template strand and initiate transcription, leading to a decrease in gene expression.
In conclusion, deleting any of these transcription factors will have a significant impact on transcription and gene expression.
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1. Suppose you have got 16 ATP from a metabolic pathway. What will be the total energy in kJ/mol? (1 point) A. 484 B. 444 C. 448 D. 488 2. Pyruvate carboxylase reaction occur in (1 point)
A. Liver- Heart B. Kidney- Liver C. Heart- Kidney D. Heart- Kidney- Liver
The total energy released from the hydrolysis of ATP to ADP is D. 488.
The total energy released from the hydrolysis of ATP to ADP is about 30.5 kJ/mol. Therefore, if you have 16 ATP molecules, the total energy released would be:
Total energy = 16 ATP x 30.5 kJ/mol = 488 kJ/mol
Therefore, the correct answer is D. 488.
Pyruvate carboxylase is an enzyme that catalyzes the conversion of pyruvate to oxaloacetate in the presence of ATP, which is an important step in gluconeogenesis.
This reaction occurs mainly in the liver, as well as in the kidney and heart. However, the liver is the primary site of gluconeogenesis, and therefore, pyruvate carboxylase is predominantly expressed in the liver. Thus, the correct answer is A. Liver-Heart.
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You are caring for a patient with an infection of a carbapenem resistant organism (CRO) strain of E. coli where secretion of a protein toxin causes significant tissue damage. It is imperative to reduce toxin secretion to save the patient. Which of the following would be the MOSTappropriate anti-microbial therapy for this case:
Group of answer choices
A. imipenem
B. linezolid
C. daptomycin
D. levofloxacin
E. eravacycline
F. pyrazinamide
G. none of the above apply
The most appropriate anti-microbial therapy for a patient with an infection of a carbapenem resistant organism (CRO) strain of E. coli where secretion of a protein toxin causes significant tissue damage would be eravacycline. (E)
This is because eravacycline is a tetracycline-class antibiotic that has been shown to be effective against a variety of Gram-negative bacteria, including carbapenem-resistant strains of E. coli.
It works by inhibiting protein synthesis in bacteria, which can help to reduce toxin secretion and prevent further tissue damage.
While the other antibiotics listed may be effective against other types of bacterial infections, they are not as effective against carbapenem-resistant strains of E. coli. Therefore, the best choice for this particular case would be eravacycline.
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The American shad is a species of herring (type of fish) that spends most of the time in the ocean but spawns in many of the larger rivers of Oregon and California. What is the name for this type of migratory life history strategy?
The type of migratory history strategy exhibited by the American shad is called anadromy.
What is Anadromy?Anadromy is a type of fish migration where fish move between freshwater and saltwater environments, often travelling long distances in order to spawn in their original habitats.
Anadromous fish, like the American shad, are born in freshwater, migrate to the ocean to grow and mature, and then return to freshwater to spawn.
This is different from catadromy, in which fish are born in the ocean, migrate to freshwater to grow and mature, and then return to the ocean to spawn. Anadromy is a common strategy among species of herring, salmon, and sturgeon.
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More than 80 years ago, a biologist studied harvest records to understand how the population dynamics of a secondary consumer may be determined by the population dynamics of a primary consumer that makes up a large part of its diet. What were the species involved, and which was the primary vs. secondary consumer (2pts)? Describe how their population sizes were linked (2pts), and explain how such a relationship might be disrupted by other factors in the ecosystem (2pts).
The species involved in this study were lynx (secondary consumer) and snowshoe hare (primary consumer).
The biologist observed that when the population of snowshoe hares increased, the population of lynx would also increase due to the availability of food.
However, when the population of hares decreased, the population of lynx would also decrease due to the lack of food. This relationship between the two species is known as a predator-prey relationship.
Other factors in the ecosystem can disrupt this relationship, such as the introduction of a new predator or competition for resources.
For example, if a new predator was introduced into the ecosystem that also preyed on snowshoe hares, the lynx would have to compete for food, which could lead to a decrease in the lynx population.
Additionally, if there was a decrease in the availability of resources for the snowshoe hares, such as food or shelter, their population could decrease, which would in turn affect the lynx population.
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Find your favorite commercial snack. The product needs a Nutrition Facts label to answer these questions. Answer the following questions from the Nutrition Facts on the label.
How many Calories in 2 servings? (Show your math.)
How many Calories from saturated fat in 1 serving? (Show your math.)
How many Calories from protein in 1 serving? (Show your math.)
How many Calories from sugars in 1 serving? (Show your math.)
What percentage of your daily fat is provided by 2 servings? (Show your math.)
With what inorganic chemicals does it provide you?
Does it provide any niacin?
Nutrition Facts
about 5 serving per container serving size 30g
amount per serving Calories 160
Total fat 8g
saturated fat 5g
trans fat 0g
Cholesterol 0g
Sodium 75mg
Total Carbohydrate 19g
Dietary Fat 0g
Total sugars 9g
Includes 9g added sugars
Protein 2g
My favorite commercial snack is Chips Ahoy! Cookies. The Nutrition Facts label provides the following information: about 5 servings per container serving size 30g amount per serving
Calories 160
Total fat 8g
5 grams of saturated fat
trans fat 0g
Cholesterol 0g
K sodium 75mg
total carbohydrates 19g
Food Fat 0g
Total sugar 9g
Includes 9g of added sugar
Proteins 2g
The many Calories in 2 servings is each serving contains 160 Calories. Therefore, 2 servings would contain:
160 Calories x 2 servings = 320 Calories
The many Calories from saturated fat in 1 serving is each serving contains 5 Calories from saturated fat.
The many Calories from protein in 1 serving is each serving contains 2 Calories from protein.
The many Calories from sugars in 1 serving is each serving contains 36 Calories from sugars:
Total sugars - Added sugars = Naturally occurring sugars
9g - 9g = 0g x 4 Calories per gram = 0
Calories from naturally occurring sugars 9g x 4 Calories per gram = 36 Calories from added sugars
The percentage of your daily fat is provided by 2 servings is 2 servings contain 16 grams of fat:
8g x 2 servings = 16g fat
One serving contains 5 grams of saturated fat:
Saturated fat x 2 servings = 5g x 2 = 10g saturated fat
To convert the fat to calories:
16g x 9 Calories per gram of fat = 144 Calories from fat
10g x 9 Calories per gram of fat = 90 Calories from saturated fat
Percent of Daily Value = 100 x Calories from Nutrien/Daily Value
144 Calories from fat/78 g Daily Value = 184.6%
78g is the recommended maximum for a 2000 calorie diet.
The inorganic chemicals does it provide you is Sodium, and does not provide niacin.
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