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Inessa [10]
2 years ago
12

What happens to the number of chromosomes during fertilization?

Biology
1 answer:
weqwewe [10]2 years ago
8 0

Answer: I believe the answer is D.

Explanation:

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Serine 14 of glycogen phosphorylase was replaced by glutamate in an experiment. The Vmax of the mutant enzyme was compared to wi
grigory [225]

Answer:

b) Glutamate's negatively charged R group mimics a phosphorylated serine residue. The Vmax is reduced because the carboxyl group is smaller and less charged than a phosphate group.

Explanation:

Vmax is the maximum velocity of a reaction. It is achieved when all the binding sites of an enzyme are occupied. Glycogen phosphorylase enzyme has a serine residue on position 14. Serine is important for its activity because serine's phosphorylation activates it. Hence, phosphorylated Glycogen phosphorylase is active.

Serine has a hydroxyl group which acts as a nucleophile leading to its phosphorylation and addition of negative charge. Glutamate is already a negatively charged amino acid so it repels the phosphoryl group. However because of its negative charge it acts like phosphorylated serine, making the enzyme functionally active. But due to lesser negative charge and smaller size as compared to phosphoryl group, it is not able to fully restore the wild type Vmax.

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3 years ago
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andreyandreev [35.5K]

Answer:a runner positioned at the start line...

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The Punnett square shows the possible genotype combinations of two parents who are hom0zygous for a trait.
Alik [6]

Answer:

100%

Explanation:

They are all heterozygous

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3 years ago
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The digestive system of most birds includes a structure called the gizzard. The
satela [25.4K]

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the small intestine

Explanation:

the small intestine breaks down food and export it to the large into the large intestine.

the large intestine converts the food into turd aka poop.

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In what way does walking help The environment? How does it make you feel about the state of our environment?
denpristay [2]

Answer: Walking plays an important role in improving our quality of life because it helps protect and improve the living environment and natural resources. ... Communities designed to be walkable have the potential to reduce air pollution and greenhouse gases because people may choose to walk or bike rather than drive. Walking plays an important role in improving our quality of life because it helps protect and improve the living environment and natural resources. Improving the environment in turn brings added health benefits that come, for example, from cleaner air, less traffic noise and fewer road accidents.

Explanation:

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