Dietary protein intake and protein turnover are the body’s only sources for providing amino acids for the amino acid pool.
a.All three statements are true.
b.Two of the three statements are true.
c.Only one of the statements is true.
d.None of the statements is true.
The correct answer and explanation is :
Correct Answer: b. Two of the three statements are true.
Explanation:
The statement contains three key claims:
- Dietary protein intake provides amino acids for the amino acid pool. ✅ True
- Protein turnover (the continuous breakdown and synthesis of body proteins) supplies amino acids for the amino acid pool. ✅ True
- These are the only sources of amino acids for the amino acid pool. ❌ False
The first two statements are accurate. Dietary protein is broken down into amino acids during digestion, and these amino acids are absorbed into the bloodstream, contributing to the amino acid pool. Similarly, protein turnover, which involves the degradation of existing body proteins and the synthesis of new proteins, releases amino acids into the pool.
However, the third statement is incorrect because there are additional sources of amino acids besides dietary intake and protein turnover. One such source is de novo synthesis, where non-essential amino acids can be produced by the body from metabolic intermediates. Additionally, some amino acids can be derived from inter-organ amino acid transport, where amino acids are shuttled between tissues as needed.
Since only two of the three statements are true, the correct answer is (b) Two of the three statements are true.
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