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makkiz [27]
3 years ago
10

The alpha helix and beta pleated sheet represent which level of protein structure?

Biology
1 answer:
hram777 [196]3 years ago
5 0

Polypeptide chains represent the primarylevel of protein structure. The secondarystructure of a protein results from hydrogen bonding between amino acids in the peptide chain. This leads to twisting or folding of the chain into the alpha helix and the beta pleated sheet shapes.

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Which of earth’s layer is a liquid
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Answer:

The outer core

Explanation:

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Which explains the information needed to calculate speed and velocity?
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Velocity is a vector quantity which means it has both magnitude and direction means in order to calculate it another vector quantity is used which is displacement on the other hand speed is a scalar quantity.

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Which of the following is not a negative consequence of upward urban growth?
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C

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Sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous
Pavel [41]

Answer:

6,25%

Explanation:

Considering that the couple has a trait of sickle cell anemia, we know that both are heterozygous for the disease (Aa) and therefore can have children with the following genotypes:

Parents: Aa X Aa

Children: AA(A x A), Aa(A x a), Aa (a x A) and aa(a x a)

Knowing that sickle cell anemia only occurs in homozygous individuals, the probability for children to have the disease according to each crossing is:

A x A = 1/4 = 25%

A x a = 1/4 = 25%

a x A = 1/4 = 25%

a x a = 1/4 = 25%

The probability of forming each homozygous child (aa) is 1/4 or 25%. Since they are two children, the probability of both having sickle cell anemia is calculated by multiplying the probability of each, so:

1/4 × 1/4 = 1/16 = 0.0625 = 6.25%

It is concluded that the probability of a heterozygous couple for sickle cell anemia to have two children with the disease is 6.25%.

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3 years ago
In a laboratory, an albino mouse was treated with a chemical, resulting in a somatic mutation that induced a skin tumor. The mou
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