Answer:
A. Concentration of substrate can affect the rate of reaction by two condition given below-
1. At low concentration of substrate, there will be increase in the rate of reaction by increasing the concentration of substrate. There would be catalytic site of enzyme available to bind to substrate.
2. The enzyme becomes saturated with substrate as the substrate concentration increases. At a point when the rate of product formation now depends on the activity or the available active sites of the enzyme itself, so, increasing more substrate will not leads to any effect on the rate of the reaction to any significant level.
Thus, there was not a significant difference in the reaction rate with 800 mg of substrate as compared to 400 m as at 400 mg all the catalytic site or active site are bound already.
B. Increasing the enzyme concentration will lead to increase the rate of reaction at 800 mg as there will be more active sites to bound to substrate.
What are the erosional and depositional features of a glacier?
Answer:
Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, arêtes, and horns. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.
Explanation:
Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, arêtes, and horns. Glaciers deposit their sediment when they melt. Landforms deposited by glaciers include drumlins, kettle lakes, and eskers.
Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory?
Answer:
Peyers patches
Explanation:
Peyers patches are group of lymphoid follicles found in the ileum of the small intestine.
This part of lymphatic system form part of immune system that help to control bacteria population in the small intestine and prevent the growth of pathogenic bacteria in the small intestines. It plays an important role in immune surveillance where it recognises pathogenic bacteria and destroy the bacteria.
It is a lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory because it form the part of the immune system which help to fight infection or foreign substances in the body, also by generating lymphocytes which is a white blood cells of the immune system which generate long term memory of foreign pathogens and destroying it.
Suggest an intracellular regulatory molecule (from your text) that growth factors might stimulate to control cell division. Please describe how it works.
Answer:
E2F transcription factors
Explanation:
The E2F transcription factors (TFs) encode intracellular factors associated with the control of the cell cycle. E2F are TFs that bind to promoter consensus sequences in order to activate transcription. These TFs control the expression of target genes involved in cell proliferation including, among others, genes for DNA replication and mitotic activation. Moreover, the E2F proteins also may act as a link between cell fate and the cell cycle. The retinoblastoma (Rb) is a protein that modulates the activity of the E2F family of TFs, and it has been shown that the Rb/E2F pathway is a key molecular mechanism associated with cell proliferation.
After the centromeres separate during mitosis, the sister chromatids, now called _______, move toward opposite poles of the spindle.
Answer:
(E) daughter chromosomes
Explanation:
Many farm animals used for meat are given antibiotics to promote their growth. What effect would this have on antibiotic resistance through time?
Answer:
It can lead to increased incidence of drug resistant bacteria.
Explanation:
Many farm animals used for meat are given antibiotics to promote their growth. They are also given these antibiotics to treat certain diseases caused by pathogenic microbes such as bacteria.
The continual use of antibiotics will however lead to increased incidence of drug resistant bacteria present in the world at large due to the exposure of the bacteria to these drugs resulting in the formation of resistant species of the bacteria with time .
Jacob calls his friend Mark to tell him the news, and to Jacob's surprise, Mark has heard of MSUD. In fact, Mark says that his wife is a carrier so he got tested to see if he was a carrier as well. After getting tested, Mark and his wife decided to have children because there was no increased risk of their child getting MSUD. Based on this information, Mark and his wife must have the genotype: g
Answer:
Explanation:
Since Mark's wife was a carrier, it means that she is heterozygous for the trait. And after Mark got tested, they decided to have children due to no increased risk if they do have children, it means the condition is not an autosomal dominant condition but a recessive condition because if the condition is dominant, only one copy of the affected allele is needed to increase risk.
Thus, with a no increased risk, it means Mark is normal i.e. carries no copy of the recessive allele.
can a impact in one species over time can impact an ecosytem ?
Answer:
Yes
Explanation:
Yes, the impact on one species over time can impact ecosystem.
An ecosystem is consist of biotic and abiotic organisms. There is a major relationship between biotic and abiotic or biotic and biotic components.
The relationship between biotic and biotic components is called food chain, in which one organisms depends on others for their survival and balance the energy flow in the ecosystem. So impact on any one species in the food chain will impact the whole ecosystem.
For example: Plants are the producers in the food chain, and if plants will be impacted or destroyed over time, the consumers depending on the plants will die from starvation and disturb the energy flow in the ecosystem. Along with this, plants are also related to abiotic factors such as maintenance of oxygen and carbon dioxide in the atmosphere, so the balance of these gases will also get disturbed.
HELP PLS ANSWER THE ONES SHADED WITH BLUE (1,2,3,4,5,6,7,8,9)
Answer:
Definitions are given below.
Explanation:
1. Cytoplasm: It is a fluid made up of salt, water and nutrients. it provides medium for the organelles which is suspended in the cytoplasm.
2. Endoplasmic reticulum: It is responsible for the formation of protein and transport proteins from one place to another in the cell.
3. Golgi bodies: It modifies the protein which is received from endoplasmic reticulum and sent the protein where it is needed.
4. Mitochondria: It is also called powerhouse of the cell. it is responsible for the production of energy from breakdown of glucose molecule.
5. Lysosomes: It helps in breakdown of various materials and also protect the body from viruses and bacteria.
6. Cell membrane: It separates the inner environment of the cell from the external environment and also helps in protection.
7. Nucleolus: Its main function is to produce ribosomal units from proteins.
8. Vacuole: It is the storage house of the cell where food and nutrients are stored which are necessary for the survival of the cell.
9. Cell wall: It provides protection to the cell as well as provides structure to the cell.
Which of these is an example of a haploid cell?
Answer:
Gametes
Explanation:
Gametes are an example of a haploid cell and are produced as a result of meiosis.
Which phrase best describes the biosphere? the rocks on land and in the water the plants on land and in the water the animals in the air, on land, and in the water the organisms in the air, on land, and in the water
Answer:
the organisms in the air, on land, and in the water
Explanation:
bc i saw quizlet
Answer:
d
Explanation:
edge 2021
There are two primary models of the universe. One is the expanding model, which says that the universe is constantly increasing in size. The other is, the steady state model, which says that the universe is approximately constant in size and shape. What evidence would you expect to see if the expanding model were correct?
Answer:
Ok, suppose that the universe is expanding:
If the universe is expanding, then the distance between "fixed" points in the universe (we can set the fixed points as planets, galaxies, etc) would change with the time.
This means that, if the distance between the Earth and a given star or planet (that is not in our nearby region) should change as time goes by.
Now, this was actually observed:
There is something called the doppler effect:
In a short way, if an object is moving away, the light that comes from that object will have a red shift (it seems a little more reddish than it actually is)
If the object is moving towards us, the light that comes from the object will have a blue shift (it seems a little more blueish than it actually is)
Those shifts can be observed from the Earth, so from that is safe to conclude that the expanding model is actually correct.
Answer:
Observing objects in the sky that gradually move away from Earth could prove that the expanding model is correct.
Explanation:
Part of a forest area was cleared to build a road. What’s one possible consequence of this clearing?
A.
The rate of the growth of trees will increase.
B.
The population of herbivorous animals will increase.
C.
Animals will migrate to other places because they have less food and shelter.
D.
The frequency of forest fires will increase.
Answer:
Option C
Explanation:
Animals will migrate to other places because they have less food and shelter. Since the forest have been cleared, their habitat (where they lived) is no more and they have to move to another place in order to survive because there would be no more food for them here.
Answer:
The answer is option C.
Animals will migrate to other places because they have less food and shelter.
Hope this helps you
I need help as soon is possible pls!!!! A physicist is studying light absorbance in the ocean. He graphs his data as shown below. What color of light would most likely be present at 200 meters below sea level, and why? Justify your answer by using the provided data.
Answer:
blue
Explanation:
if you look at the graph, it's asking which color would most likely be present 200 meters below sea level. The only color/bar that comes close, or in this case surpasses 200m, is the color blue.
The blue color of light would most likely be present at 200 meters below sea level because the wavelength of the blue light falls under the visible light spectrum.
What is Absorbance?Absorbance may be defined as a quantity that can significantly be measured by the ability of a substance to absorb light of a specified wavelength. It is remarkably equal to the logarithm of the reciprocal of the transmittance.
According to the question and graph carefully, one can easily find out the light which has penetrated deep into the ocean is blue. Apart from this, blue light significantly has the shortest wavelength which means the highest energy.
Therefore, the color of light that has most likely been present at 200 meters below sea level is blue.
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Which of the following statements is true about Mendel?
Answer: c
Explanation:
Hope it helps <3
What is the difference between class and clade? Group and genus?
Answer:
is that genus is a rank in the classification of organisms, below family and above species; a taxon at that rank while clade is a group of animals or other organisms derived from a common ancestor species. a
AND
The main difference between species and genus is the taxonomic rankings that are used for biological classifications of organisms. Genus belongs to a ranking lower than family and above species, whereas species are organisms with similar characteristics that come below the Genus classification ranking.
Estimate the volume of a human heart (in mL) using the following measurements/assumptions: Blood flow through the aorta is approximately 11.2 cm/s The diameter of the aorta is approximately 3.0 cm Assume the heart pumps its own volume with each beat Assume a pulse rate of 67 beats per minute.
Answer:
The correct answer is 70.92 ml.
Explanation:
Based on the given question, the rate of the flow of blood through the aorta (v) is 11.2 cm/s.
The given diameter of aorta is 3.0 cm
Thus, the radius (r) of aorta will be, 3.0/2 = 1.5 cm
The cross-sectional area of the aorta (A) will be calculated by using the formula, πr²
= π ×(1.5)² cm²
= 2.25 π cm²
The pulse rate given is 67 beats per minute, therefore, time taken for 67 beats is 60 seconds, hence, time taken for 1 beat will be 60/67 second
Now the volume of the heart will be,
= A × v × t
= 2.25 π cm² × 11.2 cm/s × 60/67 s
= 70.92 cm³
As 1 cm³ is equal to 1 ml. So, the volume of a human heart will be 70.92 ml.
17- Microorganisms which require 0-5.5 pH for the growth are:
A. Neutrophils
B) Acidophiles
C. Alkaliphiles
D. All of the above
E. None of the above
Acidophiles is the correct
Answer the following True or False: A hypothesis test was conducted to see if a new HIV vaccination reduces the risk of contracting the HIV virus. The implication of a Type II error from the clinical trial is that the vaccination will not be approved when it indeed does reduce the risk of contracting the HIV virus.
Answer:
The correct answer is - true.
Explanation:
Type I error occurs when the alternate hypothesis is accepted though it is false. A type II error is the failure to reject a false null hypothesis or an alternative hypothesis is rejected even though it is true.
For instance of type II errors: a blood test designed to detect the disease failing to detect the disease in a patient who really has the disease. In the given case vaccination not approved even though reduce the risk of contracting the HIV virus.
Thus, the correct answer is - true.
characters of a fertile soil
Answer:
There are so many characteristics of fertile soil like: It is rich in nutrients necessary for plant nourish ment. It includes nitrogen , phosphorus and potassium. It consists adequate minerals such as boron, chlorine, cobalt, iron, magnese, sulphur etc.Explanation:
Hope it helps you.Through which vascular tissue do water and nutrients get transported to reach the leaves during transpiration? cuticle parenchyma xylem phloem
Answer:
Xylem is one of the two types of transport tissue in vascular plants, phloem being the other. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
Explanation:
follow me plzzz
Answer:
C. xylemExplanation:
i tack test
Which interaction is an example of commensalism?
O A. Insects helping plants reproduce while eating the nectar in their
flowers
O B. Bacteria living inside a human's stomach and making the person ill
C. Birds building nests in the branches of trees
O D. Mosquitoes eating the blood of cows and passing on a disease
SUB
Answer:
C
Explanation:
Commensalism is where one organism benefits while the other is neither harmed nor benefited.
A - Both parties benefit
B - Bacteria benefit, the human is harmed
C - Birds benefit, the tree neither
D - Mosquitoes benefit, cow is harmed
Which of the following phenotypic classes reflect offspring that were generated as a result of a recombination event?
a. vestigial wings, red eyes
b. vestigial wings, purple eyes
c. full wings, red eyes
d. full wings, purple eyes
Answer:
The correct options are: A " vestigial wings, red eyes" and D "full wings, purple eyes"
Explanation:
female parent: vg+pr+/vg pr
(phenotype - full winged and red eyes)
male parent: vgpr/vgpr
(phenotype - vestigial winged and purple eyes)
Of these traits, vestigial wings and purple eyes are recessive traits. Hence, when a recombination event occurs, the offspring can potentially have a wild type trait paired with a recessive trait.
Which of the following areas indicates the occipital lobe on the diagram below? Region A is the anterior (front) section. Region B is the medial (middle) superior (up) section. Region C is the posterior (back) section. Region D is the medial (middle) inferior (down) section. Region D Region B Region C Region A
Answer:
Region C is the posterior (back) section.
Explanation:
The occipital lobe is found at the back of the head.
Hope it helps.
Answer:
C the green highlighted part
Explanation:
Took the test
Which feature separates humans from other primates? smaller brain size bipedalism use of tools complex social skills
Answer:
Complex social skills
Explanation:
Answer:
Complex social skills.
Explanation:
Humans actually have larger brains than other primates, so smaller brain size is incorrect.
Other primates, such as chimpanzees, orangutans, and gorillas, all have the ability to use tools, so that is incorrect.
Some primates, such as chimps and baboons, do stand on their hind legs at times, so bipedalism does not separate humans from other primates.
So, complex social skills separate humans from primates.
Hope this helps!
In untreated type 1 diabetes, the hepatocyte's citric acid cycle becomes overwhelmed with acetyl‑CoA from excessive fatty acid oxidation. Although the excess acetyl‑CoA is not toxic, it must be diverted into the formation of ketone bodies: acetone, acetoacetate, and D‑β‑hydroxybutyrate.
What problem would arise if the excess acetyl-CoA were not converted to ketone bodies?
a. Fatty acid oxidation would stop when all the COA is bound as acetyl-CoA.
b. While acetyl-CoA is not toxic, it inhibits D-β- ohydroxyacyI-CoA dehydrogenase.
c. While acetyl-CoA is not toxic, it prevents transfer of fatty acids into the mitochondria by forming acetyl carnitine.
d. Formation of acetyl-CoA requires uptake of a proton, and the increased pH inhibits further oxidation.
If the excess acetyl-CoA were not converted to ketone bodies, Fatty acid oxidation would stop when all the CoA is bound to acetyl-CoA. Thus, the correct option is (A).
What is Acetyl-CoA ?
Acetyl-CoA is the component of cellular respiration which adds acetyl groups to the biochemical reactions and these reactions are used in the metabolism of proteins, carbohydrates and lipids which provide energy in the form of ATP (Adenosine Triphosphate), lactic acid and Ketone bodies.
It also play an important regulatory role in intercellular mechanism which is essential for energy production when fasting or starving. It formed inside or outside the cell mitochondria where it must be freely available as a metabolite and can be produce by breakdown of carbohydrates (glucose) and lipids (fatty acid).
It's main function is to transfer the carbon atom in acetyl to other molecules. Acetyl Co-A consist of acetyl and CoA . Acetyl is [tex]CH_{3}CO[/tex] which is produced by the breaking down of pyruvate, a derivative of carbohydrate.
When this pyruvate is breakdown, it produces small bonded carbon molecules these react with Co-A it forms Acetyl Co-A.
So, the excess acetyl-CoA were not converted to ketone bodies, Fatty acid oxidation would stop when all the CoA is bound to acetyl-CoA. Thus, the correct option is (A).
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Which mode of genetic recombination is matched correctly with its description? transduction—virus transfers genes from one bacteria to another conjugation—involves splitting of one cell and results in two identical cells binary fission—requires direct cell-to-cell contact of bacteria transformation—uses a pilus to transmit genetic information between bacteria
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
Transduction is a mechanism of recombination where DNA fragments are inserted into bacteria by a viral vector. The mechanism of transduction is commonly used by molecular biology laboratories to insert gene fragments into both bacterial and mammalian cells.
Conjugation is the genetic mechanism in which bacteria transfer genetic information among them by direct contact.
Binary fission is the most common type of asexual reproduction in bacteria. In binary fission, the DNA molecule is replicated and, subsequently, the bacterial cell is divided into two daughter cells with identical genetic material.
Finally, the transformation is the mechanism of horizontal gene transfer in which one bacterium takes up genetic information into the surrounding environment and incorporates it into its genome.
Answer:
transduction—virus transfers genes from one bacteria to another
Explanation:
edge
Reptiles are closely related to birds. Which of the following characteristics do birds and reptiles share?
Which type of cell can duplicate indefinitely?
Answer:
Embryonic stem cells
Explanation:
Answer:b
Explanation:
A phosphodiester bond is used to: A. join two glucose molecules. B. join two nucleotides into a polynucleotide. C. join glycerol to fatty acids. D. join two amino acids into a polypeptide.
To join two nucleotide in a polynucleotide, phosphodiester bond is used. The correct option is B.
What is phosphodiester bond?A bond formed by a sugar group and a phosphate group; these bonds make up the sugar-phosphate-sugar backbone of DNA and RNA.
A diester bond connects two different nucleotides to form the nucleotide polymers DNA and RNA.
Thus, the correct option is B.
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Summarize the process of PCR in a diagram. Include all the steps, labeled and in the right order.
Answer:
Denaturation, Annealing and Extension are the steps of PCR.
Explanation:
There are three steps of PCR process.
1) Denaturation
2) Annealing
3) Extension
In the first step, the DNA denatures when they are allow to heat. In Annealing, the process of polymerization occurs. Polymerase chain reaction (PCR) is a method which is used to formed or produce billions of copies of a particular DNA sample. In this process, monomers attached to one another to form polymers and the process is known as polymerization. In the extension, new strands of DNA are formed by using the old DNA strands as a template.