If a nonessential amino acid is not available, cells can make it from a keto acid if a(an)________ source is available.

Question

Quizplus · Accepted Answer

Nonessential amino acids can be synthesized by the body if the appropriate keto acid (which contains the necessary carbon skeleton) and a source of nitrogen are available. Nitrogen is necessary for the synthesis of amino acids, which are composed of both carbon and nitrogen. Therefore, choice B, nitrogen, is the most appropriate answer.

If a Nonessential Amino Acid Is Not Available, Cells Can