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MA_775_DIABLO [31]
4 years ago
12

What is the backbone of the dna structure composed of?

Biology
1 answer:
Reptile [31]4 years ago
3 0

Answer:

Each DNA strand within the double helix is a long, linear molecule made of smaller units called nucleotides that form a chain. The chemical backbones of the double helix are made up of sugar and phosphate molecules that are connected by chemical bonds, known as sugar-phosphate backbones.

Explanation:plz mark me as brainliest

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Researchers test a group of cells for DNA content immediately following mitosis and find the average to be 12 picograms of DNA p
zlopas [31]

Answer:

The correct answer is - 24, 24

Explanation:

In any type of cell division, there is an interphase stage before the actual process of division which is a preparatory process or stage that includes different substages like G1, S, and G2. S phase is a synthesis of the cell cycle responsible for duplication or replication of the DNA.

So, at the end of the S phase, the DNA amount becomes double its initial amount and remains the same in the G2 phase. So, if the initial amount is 12 picogram then it will be double in the S phase and remain 12 in G2 as well.

7 0
3 years ago
Explain how the melting of the sea ice may affect<br><br> people living on the coast of Florida.
Levart [38]

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Explanation:

3 0
3 years ago
What term describes the rising and sinking of the lithosphere as material is added or removed?
Margaret [11]
<span>Composition. (We use the crust-mantle-core terminology to describe differences in chemical composition in Earth's interior. We use the lithosphere- asthenosphere terminology to describe differences the physical state and behavior. Note that the boundaries between layers with different compositions do not occur at the same depths as the boundaries between layers with different physical properties. For example, there is a change in composition when passing from crust into mantle. But there is no change in physical state or behavior at this boundary- the uppermost part of the mantle behaves in the same way that the crust does because it is still far enough below its melting temperature to be a rigid, brittle solid. The transition to a softer, more pliable solid occurs further down within the mantle and this change in behavior occurs with no change in composition.)</span>
3 0
4 years ago
Which of the following describes how the winter season affects organisms in the tundra biome?
alukav5142 [94]

The correct answer is D. Animals not adapted to cold migrate to warmer regions, because suppose that the cold temperatures kill most of the plants, so if they can die why they select that place to live? The option B is not logical because this require long time to evolve this characteristic and the option C has more logic but it still not enough, because if the temperatures are colder more animals can die. I hope this help.

3 0
3 years ago
What is the term for a female reproductive cell?
maria [59]

Answer:

I believe your answer is fertilization.

6 0
3 years ago
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