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Elza [17]
3 years ago
8

Although both pyruvate dehydrogenase and glyceraldehyde 3-phosphate dehydrogenase use NAD as their electron acceptor, the two en

zymes do not compete for the same cellular NAD pool. Why?Choose ONE answer:a. NAD+ is only used once before being degraded, so it is not regenerated for subsequent rounds.b. The NAD+ pool in the mitochondria and cytosol are separated by the mitochondrial membranec. The enzymes are found in different types of cellsd. Both enzymes use FAD as their electron acceptors.e. The pyruvate dehydrogenase reaction uses FAD as its sole electron acceptor whereas glyceraldehyde 3-phosphate dehydrogenase uses NAD+f. NAD+ remains tightly bound to each enzyme, so the NAD pools are not shared.
Biology
1 answer:
Nataly [62]3 years ago
6 0

Answer:

. The NAD+ pool in the mitochondria and cytosol are separated by the mitochondrial membranece

Explanation:

The location of these 2 enzymes provided an insight to this:

.

Pyruvate dehydrogenase is located in the MATRIX of mitochondrial,

The Glyceride 3 phosphate is located in the CYSTOSOL.

These 2 locations are separated by the double intramembranes of the mitochondrial.Thus the separation cut the mitochondrial and cytosolic acess to the same Co enzyme NAD pool.

Therefore it ensured no competition between the same enzymes for the same NAD.pools.

It is important to note that: shuttle mechanisms allow the tranfer of reduced equivalents from one nicotanimide coenzymes to another.

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Answer:

C. two tetramers of histone proteins

Explanation:

The nucleosome core particle is responsible for packaging DNA in the chromosomes. The protein components that make up the nucleosome core are two tetramers of histone proteins. One of which is composed of two units each of histones H2A and H2B, while the other one is composed of two units each of histones H3 and H4. Thus making up the entire protein component of the nucleosome core.

8 0
4 years ago
5. After you have found a new species of ape, you spend 10 years in the field seeking a fossil of its ancestor. You do not find
yawa3891 [41]

Answer:

This lack of fossil data is expected, because the fossil record is incomplete.

Explanation:

Fossilization is a slow, complex and extremely rare process that depends on several favorable conditions for the conservation of traces or materials left by an organism:

1 - Rapid burial of the material;

2 - Presence of rigid parts that are more resistant to degradation;

3 - The type of sediment should be thin and less prone to erosion.

4 - The environment in which the material is located should be low in oxygen to avoid degradation due to oxidation.

5 - The temperature of the place where the material is buried should preferably be cold because the action of decomposing microorganisms in these environments is much lower.

Therefore, it is very common and expected that the fossil record is incomplete.

3 0
3 years ago
Functional Magnetic Resonance Imaging is a tool that has been very useful in identifying what parts of the brain do what. Scient
Ne4ueva [31]

Answer:

E. It takes a picture of the brain according to oxygen levels. More oxygen in an area indicates more activity in that area.

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Haemoglobin is diamagnetic when oxygenated but paramagnetic when deoxygenated. This distinction in magnetic characteristics leads to tiny variations in the blood MR signal. Since blood oxygenation differs, these variations can be used to identify brain activity depending on the concentrations of neural activity.

4 0
4 years ago
Scientists used major changes in life forms in the fossil records to form the geologic time scale
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<u>Answer:</u>

Geologists have sorted earth’s history into different geologic time scale. They just clubbed it into time scales by observing the major changes in the life forms that existed on the earth. Inferring to the fossils found in rocks the time scale was calculated.

First era single cell animals were formed then formed the complex animals.Then Mesozoic era where it is known as the era of dinosaurs. Then the evolution of different species of life during Cenozoic era. These major changes found through fossils helped them to form the GTS.

8 0
4 years ago
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All cells come from cells it’s a 7 letter word what is it?
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decided 19 × 1080 add that to 2097 + flip

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1 year ago
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