Since there are no genes coding for carbohydrates, nucleic acids, or lipids, how do cells produce them?
A. Enzymes encoded by genes synthesize these products.
B. Cells import these products from older cells.
C. Cells absorb these products by endocytosis.
D. Cells are born with all the products they need.
E. Cells can produce carbohydrates, nucleic acids, and lipids out of proteins.
Answer: A
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