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MArishka [77]
3 years ago
6

What are the three chemical molecules that make up the subunits of DNA?​

Biology
1 answer:
kotykmax [81]3 years ago
5 0

Answer:

Nucleotides are the subunits of DNA. The four nucleotides are adenine, cytosine, guanine and thymine. Each of the four bases has three components, a phosphate group, a deoxyribose sugar and a nitrogen-containing base.

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Eric made a physical model of a cell membrane by putting one zip-top plastic bag inside another. He punched some straws through
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Answer:

A cell membrane is made of two layers.

The cell membrane is composed by a phospholipid bilayer where the interior side is hydrophobic and non-polar, while the outside is hydrophilic and polar

Pores and proteins in the cell membrane allow passage through it.

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3 years ago
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Demyelination results from issues associated with myelin producing cells. What is an example of a myelin producing cell in the c
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<h2>CNS  </h2>

Explanation:

An example of a myelin producing cell in the CNS is oligodendrocyte

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I think it is D

Explanation:

8 0
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External respiration involves The exchange of O2 and CO2 between the lungs and the environment The exchange of wastes through th
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External respiration (correct answer) involves the exchange of oxygen and carbon dioxide within the environment.

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The exchange of oxygen and carbon dioxide within the cell is called cellular respiration and involves carrying oxygen from the blood to the cell then the cell uses it as the final electron acceptor in the electron transport chain. The metabolic wastes of the cell, primarily carbon dioxide, goes now to the bloodstream to be exchanged for oxygen in the lungs.
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