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prohojiy [21]
3 years ago
9

What do we call a condensed coil of DNA wrapped around histone proteins?

Biology
2 answers:
nikdorinn [45]3 years ago
8 0

Answer:

B

Explanation:

A nucleosome is a section of DNA that is wrapped around a core of proteins. Inside the nucleus, DNA forms a complex with proteins called chromatin, which allows the DNA to be condensed into a smaller volume. When the chromatin is extended and viewed under a microscope, the structure resembles beads on a string. Each of these tiny beads is a called a nucleosome and has a diameter of approximately 11 nm. The nucleosome is the fundamental subunit of chromatin. Each nucleosome is composed of a little less than two turns of DNA wrapped around a set of eight proteins called histones, which are known as a histone octamer. Each histone octamer is composed of two copies each of the histone proteins H2A, H2B, H3, and H4. The chain of nucleosomes is then compacted further and forms a highly organized complex of DNA and protein called a chromosome.

shutvik [7]3 years ago
8 0

Answer:

a

Explanation:

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5 0
3 years ago
Read 2 more answers
Explain the respiratory system of a frog and the importance of "vacularization" of the skin and the mesentery
fredd [130]

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A frog may also breathe much like a human, by taking air in through their nostrils and down into their lungs. The mechanism of taking air into the lungs is however sligthly different than in humans. Frogs do not have ribs nor a diaphragm, which in humans helps serve in expand the chest and thereby decreasing the pressure in the lungs allowing outside air to flow in.

In order to draw air into its mouth the frog lowers the floor of its mouth, which causes the throat to expand. Then the nostrils open allowing air to enter the enlarged mouth. The nostrils then close and the air in the mouth is forced into the lungs by contraction of the floor of the mouth. To elimate the carbon dioxide in the lungs the floor of the mouth moves down, drawing the air out of the lungs and into the mouth. Finally the nostrils are opened and the floor of the mouth moved up pushing the air out of the nostrils.

Frogs also have a respiratory surface on the lining of their mouth on which gas exchange takes place readily. While at rest, this process is their predominate form of breathing, only fills the lungs occasionally. This is because the lungs, which only adults have, are poorly developed.


6 0
3 years ago
Does CODIS still exist?
Gala2k [10]
I believe CODIS still exist because if there is anything new about DNA in a laboratory, it will go straight to CODIS>
4 0
3 years ago
All of the following are examples of properties of water except a.bouyancy b.respidity c.salinitay d.alkalinity
brilliants [131]
All of the following are examples of properties of water except bouyancy
7 0
3 years ago
Which of the following animals has fur that changes color with the season?
notsponge [240]

The correct answer is (b) arctic fox

The arctic fox shows two color of fur depending upon the season. During summer and spring season the fox has dark colored coat .It does so to match the color of the brown dirt in the surrounding. In winter's the arctic fox turns its fur to white to match the color of the snow in the surrounding. This phenomenon is known as " camouflage". Animals have developed this adaptation to protect itself from being killed by other animals by changing the color of the fur according to the color of the surrounding.


7 0
3 years ago
Read 2 more answers
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