Answer:
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Explanation:
Answer:
<u>proteins.</u>
Explanation:
The DNA code contains instructions needed to make the proteins and molecules essential for our growth, development and health.
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
