What is the function of the nucleus?
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a. to provide the cell with energy
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b. to combine amino acids to make proteins
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c. to control what enters and leaves the cell
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d. to store the cell's genetic material

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

What substance acts to prevent sudden ph changes in bodily fluids?