Answer:
A mutation in the N-terminal region may alter protein stability
Explanation:
Transport proteins are proteins capable of transporting substances through biological membranes. These proteins are located within cellular membranes where they form channels that allow the movement of substances between the internal and external sides of the membrane. The N-terminus is the first region in the protein that emerges from the ribosome during its synthesis. This region is usually composed of signal peptides consisting of about 30 amino acids required for protein delivery. Moreover, the N-terminal region is also important because it dictates protein degradation by peptidases. Consequently, mutations in the N-terminal region of transport proteins can alter the properties of these proteins, i.e., either by modifying protein stability or by altering protein signaling.
2.
When there is more water outside a cell than inside a cell, water will
O move into the cell causing it to shrink
O move into the cell causing it to expand
move out of the cell causing it to shrink
move out of the cell causing it to expand
Answer:
I'm pretty sure it is: move into the cell causing it to expand
Explanation:
A 26-week-old baby was brought to the pediatric clinic because of increasing lethargy and cyanosis. The infant has been in good health at birth, and the mother had attempted breast-feeding. A blood sample was collected and a positive test for methemoglobinemia was obtained. The baby then was treated with intravenous ascorbate and methylene blue. Within 2 days the child was alert, and the cyanosis had disappeared. It is known that methemoglobin has absorption spectra maxima at 500 nm and 631 nm.
Answer the following questions:
a. What is the chemical difference between hemoglobin and methemoglobin, and how do their oxygen capacities compare?
b. How do you analyze the sample blood to detect methemoglobin?
c. What is the cause of the cyanosis associated with toxic methemoglobinemia?
d. What is the biochemical basis for treatment of toxic methemoglobinemia with ascorbate and methylene blue?
Answer:
a,
This is due to differences in the oxidation states of Fe. atoms present in the two protein pigments.
Generally,the Fe2+ atom in the heme groups is responsible for the oxygen carrying capacities of haemoglobin in RBC.However,in +2 state that Fe carry oxygen through cooperative binding in the blood.When methemoglobin is formed the Fe exits in +3,and therefore can not bind oxygen. Methemoglobin is a mettaloprotein of Fe3+ states. It results from the oxidation of Fe atoms in Hb from Fe2+ to Fe3+ states,during exposure to certain medications,and some nitrate,certain dyes and some compounds.
This can be conducted with CO-oximeter.This is a device used to measure the blood percentage oxygen saturation levels.It conduct this by measuring the oxygen carrying capacity of haemoglobin in a blood sample. Since oxygen saturation levels of a blood sample depends on the amount of Hb,therefore by passing some wavelengths of light across the blood samples,The more the wavelength of lights absorbed by the blood samples, the more the percentage saturation of the blood sample with oxygen,and therefore the oxygen carrying capacity of the blood,thus more Hb.
Hence, if the blood sample absorbs wavelength of light in the range of (500 nm and 631 nm.) it shows that little Hb is present in the blood samples,and the blood should contain Methemoglobin of Fe3+ and not Hb.
Methemoglobinemia is a condition in which methmoglobin concentration of the blood rises,due to the higher percentage of Hb,with F3+( of poor oxygen carrying capacity or uncoupling ) compare to normal F2+ for carrying oxygen. Since these can not transport oxygen,Cyanosis results as the baby turns blue,with lack of oxygen.
Since the rise in the concentration of methmoglobin is the major cause of this condition,reduction of it concentration is the primary step.Therefore, the Methylene blue role is to reduce the amount of methmoglobin by enzyme NADPH-methemoglobin reductase.This occurs with 10-60mints after administration.Thus the concentration of these pigment is reduced,likewise its toxic levels.
Ascorbate can also be used,however a lot of doses is required for this to have a significant effects,and compare to Methylene blue it is less effective.,
Explanation
In most mammals, the embryo obtains food substances from the mother via the
O Yolk
O Amnion
O Placenta
Uterus
Explanation:
it is through the placenta.
it also protects the embryo from harmful substances
Where is the last storage location for melted snow? (2 points) Where is the last storage location for melted snow? (2 points) Group of answer choices Rivers Ocean Streams Mountains
Answer:
Ocean
Explanation:
Ice is usually found in the glaciers in the mountains and once it gets heated it flows down through melting and forms a stream and enters into rivers and these streams combine and lead to the oceans. Thus these oceans become the ultimate storage units of melted snow. Ice and cannot stay in solid-state for too long.Explain the mechanism responsible for summation of contractions and the increase in height of contraction when the stimulus frequency is increased.
Answer:
The higher the stimulation frequency, the contractions will be more continuous and even additive.
Continuous stimuli reactivate muscle contraction once the action potential cycle is complete.
Explanation:
Muscle contractions can be continuous or cumulative once the action potential curve drops, since the action potential at the top of the mountain is in a refractory period.
I knit a graph of what cumulative contractions are like due to continuous stimulation.
In the graph I leave you pointed out some references:
mr = refractory moment
mnr = non-refractory moment (where the new stimulation is accepted and a more powerful cumulative muscle contraction is generated)
PA = potential for muscle action or contraction itself.
What would cause antibodies to attack the cells of the body?
Answer:
In autoimmune diseases, such as lupus, multiple sclerosis and rheumatoid arthritis, people produce antibodies that stick to their body's own proteins and attack healthy cells.
Explanation:
Match each of the following descriptions with the correct term:
a. Located on presynaptic membrane
b. Space between two neurons
c. Contains neurotransmitters
d. Located on postsynaptic membrane
e. Bulbous ending of axon
f. Chemical messenger
1. synaptic cleft
2. neurotransmitter
3. synaptic vesicle
4. receptor
5.axon terminal
6. calcium channel
Answer
a-6
b-1
c-3
d-4
e=5
f-2
Explanation:
The sequence shows synaptic transmission across
The arrival of action potential at the presynaptic neuron,prompted the influx of calcium ions on the presynaptic membrane to the axoplasm.
This leads to the fusion of the synaptic vessels with the post synaptic membrane,These empty their contents of neurotransmitters into the synaptic cleft.
The neurotransmitter e.g acetycholine crosses the cleft to bind with the receptors on the postsynaptic membrane,
The leads to the opening of ligand gated sodium channels which leads to the transmission of the action potential as Post Synaptic Potentials.
This is transmitted along the axon of the postsynaptic neuron,as post synaptic potential which can either be excitatory or inhibitory
With the aid of a sketch. Describe foetal circulation
Answer:
In animals that give live birth, the fetal circulation is the circulatory system of a fetus. The term usually encompasses the entire fetoplacental circulation, which includes the umbilical cord and the blood vessels within the placenta that carry fetal blood.
Blood flow in the unborn baby follows this pathway: Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby's liver. There it moves through a shunt called the ductus venosus
A biologist is in the process of classifying a newly discovered fungus. The fungus is a decomposer and has saclike structures. The organism most likely belongs in the same group as which of the following? fungi that are rusts fungi that are associated with bread mold fungi that makes blue cheese fungi that are autotrophic decomposers
Answer:
fungi that are associated with bread mold
Explanation:
Bread mold fungi are fungi, they grow where there is moisture and organic food substance.
Bread mould are formed from mould spores that grows usually on bread surface especially when exposed
they feed on the organic substance found in the bread such as carbohydrate. Bread mould grow within 5-7days.
Answer:
b. fungi that are associated with bread mold
Explanation:
All of the following would be visible on a karyotype except
aneuploidy.
polysomy.
trisomy.
homologous chromosomes.
Answer: I think aneuploidy id wait for someone else to confirm this
Explanation:
All of the following would be visible on a karyotype except is aneuploidy
How to identify karyotype?The normal karyotype of the species is described as 46, may XX or XY, in which the first number of chromosomes is followed by a comma indicating the chromosomes. Thus, 46, XX corresponds to the karyotype of a woman; and 46, XY represents a male karyotype.
Aneuploidy is the presence of an abnormal number of chromosomes in a cell so this is the exception.
See more about genes at brainly.com/question/8832859
Which series correctly lists the eight taxonomic levels in order, from the broadest group to the most specific group? species, genus, family, order, class, phylum, kingdom, domain domain, kingdom, phylum, class, order, family, genus, species species, genus, family, class, order, phylum, kingdom, domain domain, kingdom, phylum, order, class, family, genus, species
Answer:
The correct answer is B.) domain, kingdom, phylum, class, order, family, genus, species.
Explanation:
domain, kingdom, phylum, class, order, family, genus, species make the most sense in this question
I also did the test and got it correct
:)
The series that correctly lists the eight taxonomic levels in order, from the broadest group to the most specific group is: domain, kingdom, phylum, class, order, family, genus, species.
What is taxonomic order?Taxonomic order refers to the systematic arrangement of organisms into a hierarchy of groups based on their shared characteristics and evolutionary relationships. Taxonomy is the science of identifying, describing, and naming species, and it helps to organize the diversity of life on earth into groups that reflect their evolutionary history.
The taxonomic order starts with the broadest category, the domain, and narrows down to the most specific category, the species. Each category represents a level of classification that shares certain characteristics, and the categories are nested within each other, forming a hierarchical structure.
The eight main taxonomic levels in order, from broadest to most specific, are domain, kingdom, phylum, class, order, family, genus, and species. This hierarchical system of classification helps scientists to better understand the relationships and diversity of organisms in the natural world.
Learn more about taxonomic classification, here:
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Albumin is a protein found in blood that helps to regulate amount of fluids in the body. What is the main function of albumin?
to provide structure
to fight disease
to maintain homeostasis
to regulate cell reactions
Answer: c.) to maintain homeostasis
Explanation: you're welcome!! cx
Answer:
C
Explanation:
Edge2020 quiz
What common features do eukaryotic mRNA share? Please use one of these features to describe how you can isolate eukaryotic mRNA from the cell extract. (limit your answers in 4 lines)
Answer:
A common feature in mRNAs that allow extraction from the cell is the 5' cap region which has a Guanine nucleotide attached to the mRNA in an atypical five prime to five prime triphosphate linkage.
Explanation:
The 5' cap structure serves to protect the mRNA against damage from RNA phages and an extraction protocol an be used to isolate the mRNAs from the cells. Reagents such as Dichloromethane, sodium hydroxide and diethyl ether in aqueous solution helps separate the organic layer, a silica-gel column can be used to further isolate the mRNAs
PLEASE HELP ME ASAP BECAUSE IT IS DIFFICULT TO UNDERSTAND. Explain it for me.
Answer:
C.
Explanation:
For mRNA strands, there are four letters used in their code. A (adenine), U (Uracil), G (guanine), and C (cytosine.)
For RNA, it is the same, but the Uracil is replaced with Thymine (T).
A always pairs with U.
G always pairs with C.
YOUR QUESTION:
The scientist's strand code is has to convert the Thymine to Uracil since it is RNA instead of mRNA.
Hopefully this somewhat helped :)
what is DNA explain the concept of DNA and RNA
Answer:
DNA is the abbreviation of deoxyribonucleic acid, while RNA stands for ribonucleic acid. Both the RNA and DNA carry certain genetic information, however, there is some difference between the two. DNA comprises sugar deoxyribose and RNA comprises sugar ribose. DNA is found to be stable under alkaline conditions, while RNA is not stable.
DNA is a molecule having double strands, while RNA is a single-stranded molecule. There is a slight difference in the base-pairing found in the two nucleic acids. In DNA, the bases present are adenine, thymine, cytosine, and guanine. While RNA utilizes adenine, uracil, cytosine, and guanine bases. Both RNA and DNA perform distinct roles in humans. RNA codes for amino acids and functions as a messenger between the ribosomes and the DNA to produce proteins. While DNA is accountable for storing and conducting genetic information.
__ ions leave the cytoplasm rapidly during the repolarization phase. both A and C none of the above Calcium Sodium Potassium
Answer:
Potassium ions
Explanation:
During repolarization, more potassium ions leaves the cell making the cell less positive and more negative bringing about repolarization.
The event of repolarization comes after the depolarization of the cell wherein more sodium ions which are positively charged flows into the cell letting the cell become less negative leading to depolarization of the cell.
Jayden is raised in a culture where girls are not expected to like math or do well at math. Jayden therefore rarely studies for tests and in middle school, her test scores begin to drop below the average. In high school, she ends up taking the lower-level math courses. Which theoretical concept does this example illustrate? A. cognitive dissonance B. the self-fulfilling prophecy C. the actor-observer discrepancy D. the fundamental attribution error
Answer:
THE SELF FULLFILLING PROPHECY
Explanation:
BRAINLIEST PLS
The leaves of both monocots and dicots contain different tissues in a different organization than in the stems and leaves, but again, share many similarities. View the photos of a generalized plant leaf in the provided PowerPoint to answer the following questions. (12 points possible, 6 points each part) a. What function do the leaves of plant serve in supporting its survival and reproduction? Describe at least two important functions of leaves. b. Describe in your own words two unique cell types or tissue types we only see in plant leaves. How do they support the survival of the plant?
Answer:
Leaf are usually flattened green extension from the stem of a vascular plant.
a) Leaves functions :
- primary sites of photosynthesis and produces food for plants.
- leaves are an essential part of stem system and connect through vascular system to the rest of the plant so that free movements and exchange of nutrients, water and end products of photosynthesis.
b) leaves are differentiate into three types of tissues: dermal tissue, vascular tissue, and ground tissue. Dermal tissue protects the plant, and controls gas exchange in leaves, vascular tissues helps in translocation of nutrients and water.
TS is 67 years old with a long history of knee osteoarthritis for which he self-medicates regularly with over-the-counter (OTC) naproxen. He is in the clinic today complaining of a swallowing difficulty that has progressively worsened over the past several months. He has otherwise been healthy and has not seen a doctor in many years. TS denies significant past medical history. A review of systems is negative except for arthritic symptoms and swallowing difficulty. He denies noticing blood in his stool and vomiting blood. He denies history of gastroesophageal reflux disease (GERD) and ulcer. He does not drink alcohol, although he drank heavily many years ago. He does not smoke. TS describes the dysphagia this way: "Food gets stuck in my throat, and I can’t get it down." The feeling occurs only after he has ingested solid food; liquids are not a problem. There is burning chest pain associated with meals. He is scheduled for an upper GI endoscopy.
Required:
a. What is the likely cause of the dysphagia?
b. What advice should he be given regarding his OTC medication at this time?
c. What are the usual signs and symptoms of GERD? How will it be managed?
Answer:
Dyspahgia and alcohol are related.Past years of alcohol(besides medication for asthma,sedatives,antidepressants) intake may trigger the transformation of some of the cells lining the oesophagus. The oesophagus is lined with stratified epithelial cells. Persistent alcohol intake may lead to transformation these cells to abnormal cell of columnar epithelial.They are known as Dysplasia
The dysplasia in the patients leads to Barrett's esophagus.These Columnar cells makes the oesophagus of TS prone to esophageal adenocarcinoma .The dysplasia may lead to tumour,and therefore obstruction of the oesophagus.This may therefore account for the Dysphagia experienced by TS,Hence peristalsis is inhibited and soild foods can not be moved down,
2.The state of the medication should be liquid. Because of the difficulty in swallowing,which will not allow the medication to reach stomach,for absorption.Intravenous administration can also be adopted.
3. Dysphagia,burning sensation due to acid reflex , pain in the chest and upper abdominal part ,tendencies to regurgitate foods,bad breath, are some of the symptoms of Gastroestro esophageal reflux,
Abstinence from alcohol,oily foods,smoking,avoiding lying down immediately after eating,avoidance of carbonated drinks,tight clothing at the waist, and use of herbal products e.g marshmallow are examples of method of managements
Use of anti acids,H2 blockers,and application of erythromycin,together with surgery are used for the managements.
Explanation:
Fur color in mice is affected by a gene with two alleles. The B allele causes dark brown fur and is completely dominant over the b allele that causes light brown fur. What is the fur color of a mouse with the genotype, Bb
Answer:
Since this is heterozygote dominant state(Bb), and B allele is dominant over the b allele brown(b) ,hence the fur color must belong to the dominant allele which is dark brown.
Explanation:
Generally a dominant gene is the type that manifest itself from generations to generation irrespective of the presence of the recessive gene.
If there are two allele for fur colors (dark and light brown)
Therefore B(Dark brown) is a dominant allele,assuming with genotype BB.
while the recessive light brown (bb)
Therefore if the F1 generation is crossed the offspring are
Bb,Bb,Bb,Bb. These are hetero zygote dominants
Therefore the phenotype is dark brown.
In Complete dominance, the dominant allele masks the expression of the recessive allele. Heter0zyg0us individuals, carrying both alleles, only express the dominant phenotype. The fur color of a Bb mouse is dark brown.
-------------------------------------------
Available data:
A diallic gene codes for fur colorB allele is dominant and codes for dark brownb allele is recessive and codes for light brownB allele is completely dominant over the b alleleThe hint to answer this question is that The B allele causes dark brown fur and is completely dominant over the b allele. This sentence suggest that complete dominance is going on.
Complete dominance
When the dominant allele completely masks the recessive allele, we talk about complete dominance. This is the case of individuals that are heter0zyg0us for a particular gene and express the dominant phenotype. The dominant allele is hiding the expression of the recessive allele. Many genes show complete dominance.
The mouse with the heter0zyg0us genotype Bb is carrying both alleles. However, the dominant allele B hides the expression of the recessive allele b.
This mouse expresses the dominant phenotyope dark brown.
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Related link: https://brainly.com/question/20399807?referrer=searchResults
Help can you pls number 2 to 4
Answer:
Hey there!
1. Load
2. Broom
3. Flagpole
Hope this helps :)
10 Points
Which of the following statements is TRUE:
A. Plants are single celled, animals are multicellular, both are eukaryotes
B. Plants and animals are eukaryotes and multicellular
C. Plants are eukaryotic, animals are prokaryotic
D. Plants and animals are prokaryotes and multicellular
Reset Selection
Answer:
Option B is the correct answer.
Because they both are multicellular and eukaryotes.
Those organism which are composed of multiple no. cell is called multicellular organism. Those organism which have their cells composed of all cell organelles and nucleus is bounded by nuclear membrane is called eukaryotes.Hope it helps...
Answer: B
Explanation: They are both multi-cellar(having more than one cell)
Also they are both eukaryotes meaning that they both have a nucleus.
Even though cannabis use is legal in some states, it may not be allowed on a college campus in those states because:
Answer: well you can consider half of the college campus population as underage. So the distribution to monitors would be easier. Making it illegal is just easier
Explanation:
help asap giving branlist plsss helppp
Answer:
except option 2 all of them are applied
Explanation:
Produces proteins
What produces protein
Answer:
There are two organelles that produce proteins
The endoplasmic reticulum The ribosomes.Explanation:
Answer:
ribosomes
Explanation:
D
Via the mother's cardiovascular system and the ________ , the respiratory system supplies oxygen to and removes carbon dioxide from the blood of a developing fetus.
Answer:
The mother's cardiovascular system and the placenta.
Explanation:
Babies receive their oxygen and get rid of the carbon dioxide with the help of both the cardiovascular system of the mother and the placenta. The gases dissolve through the placenta and then gets exchanged in the cardiovascular system of the mother. So the answer is the mother's cardiovascular system and the placenta.
I hope this answer helps.
In the cytoskeleton these are the thickest of the three components, typically in cell maintenance of cell shape, chromosome movement and organelle movements.
Answer:
The correct answer is - Microtubules
Explanation:
The cytoskeleton is a complex web of fibers present and find throughout the cytoplasm
It helps in organizing the shape size, structures and activities of the cell, anchoring many organelles . It is made up of of 3 types of molecular components: Microtubules , Microfilaments , and Intermediate filaments.
Microtubules : it is the thickest of of all the 3 components of the cytoskeleton as it is made up of tubulin. Maintenance of cell shape, organelle movements, chromosome movements in cell division, cell motility are major role of microtubules.
Thus, the correct answer is - Microtubules
What is produced when cells differentiate?
•proteins
•hormones
•uniform cells
•specialized cells
Answer:
specialized cells
Explanation:
i believe is the answer
22. Sickle cell disease is... (1 point)
A)autosomal dominant
B)dominant
C)sex-linked recessive
D) autosomal recessive
Answer:
D. autosomal recessive
Explanation:
Sickle cell is a hereditary disease caused by a mutation in one of the genes that encode the protein hemoglobin. It is inherited in an autosomal recessive pattern, meaning that both copies of the gene have mutations. The mutation causes the red blood cells to have a sickle shape.
Hope this helps.
Consider a pendulum swinging. Which type(s) of energy is/are associated with the pendulum in the
following instances:_________.
1. the moment at which it completes one cycle, just before it begins to fall back towards the other end
2. the moment that it is in the middle between the two ends
3. just before it reaches the end of one cycle (before step 1
a.
1. potential and kinetic
2. potential and kinetic
3. kinetic
b.
1. potential
2. potential and kinetic
3. potential and kinetic
c.
1. potential
2. kinetic
3. potential and kinetic
d.
1. potential and kinetic
2. kinetic
3. kinetic
Answer:
1 - Potential 2 - Kinetic 3 - Potential and Kinetic
Explanation:
Potential energy is the energy that an object has when it has a certain amount of elevation from the ground level and to calculate it, we can multiply the mass of the object with the gravitational acceleration constant.
hKinetic energy is the energy that the object has when it has a speed above zero, when it is moving. We can calculate the kinetic energy by multiplying the mass of the object with it's speed.
In the first option, the pendulum has a height because it is just about to fall down, but it has no speed. So it only has potential energy.
In the second option, the pendulum is between the two ends so it is at the equilibrium point where it has no elevation but it has speed. So İt only has kinetic energy.
In the third option, the pendulum is still moving to the maximum height, so it has both elevation and speed, giving it both kinetic and potential energy.
I hope this answer helps.