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dusya [7]
3 years ago
8

DNA within the cell is wrapped around nucleosomes to form chromatin. When chromatin is in the form of a 30 nm fibril, how many c

opies of H1 and H2A histone proteins would be found in a stretch of chromatin containing 20 nucleosomes?
a. 40 H1, 20 H2A
b. 20 H1, 40 H2A
c. 40 H1, 40 H2A
d. 10 H1, 30 H2A
e. 20 H1, 20 H2A
Biology
1 answer:
vodomira [7]3 years ago
8 0

Answer:

The correct answer is option b. "20 H1, 40 H2A".

Explanation:

Chromatin is a complex that protects and condenses the genetic material comprised of DNA and proteins. When chromatin is in the form of a 30 nm fibril, nucleosomes have a regular positioning along the DNA. This means that each nucleosome is associated with a single H1 molecule. Therefore a chromatin containing 20 nucleosomes will have 20 copies of H1 and 40 copies of H2A, because each nucleosome has 2 copies of the core histone H2A.

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10-15 times per second

Explanation:

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Products enter a reaction and reactants come out of a reaction true or false?
hjlf

Answer:

\boxed {\boxed {\sf False }}

Explanation:

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<em />

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The reactants enter and the products come out.

So, the statement given - products enter a reaction and reactants come out - is false and it is actually the other way around.

3 0
3 years ago
Which type of epithelium is composed of multiple layers, including an apical layer containing tall, slender cells?
Mademuasel [1]

The question is incomplete as it does not have the options which are:

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Answer:

Stratified columnar

Explanation:

Epithelial tissue is the tissue formed by the cells which form a layer of cell and lines the lumen of the organ and also covers the organs. The epithelial tissue can be classified based on the number of layer and shape of the cell.

In the given question, the shape of the cell is slender and are tall therefore are called columnar. The cells form more than one layer or multiple layers therefore form stratified layers.

Therefore,  the epithelial tissue formed by these slender shaped multiple layers is known as the stratified columnar layer. The stratified columnar is present in the respiratory tract and the digestive tract.

Thus,  Stratified columnar is the correct answer.

4 0
3 years ago
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Anettt [7]

Answer:

1 Cervical Lymph Nodes

2 Right Lymphatic Duct

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Explanation: are correct

7 0
2 years ago
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Andre45 [30]

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Explanation:

If random mating is taking place on the conditions that no evolution is taking place the genetic pool will be maintained through generations.

Random mating will be based on intelligence in humans because this is the trait which gets exhibited only when showcased otherwise remains hidden while other characters like personality, appearance and athleticism are phenotypically expressed character.

Random mating is not under the influence of genotype. Intelligence is a trait which needs to be more in human as random mating takes genotype frequency in consideration.

8 0
3 years ago
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