Which of the following is NOT a potential fate of amino acids from dietary proteins?

• A. Used to build non-protein, nitrogen-containing products.
• B. Deaminated and converted to glucose or fat for energy.
• C. Stored in the liver for later use.
• D. All of the above are potential fates of absorbed dietary proteins.

Answer: (C)

Verified step by step guidance

1. Step 1: Understand the context of the question. Amino acids are the building blocks of proteins, and once dietary proteins are digested and absorbed, amino acids can have several metabolic fates in the body.
2. Step 2: Review the potential fates of amino acids. Amino acids can be used to synthesize proteins, create non-protein nitrogen-containing compounds (e.g., neurotransmitters, nucleotides), or be deaminated (removal of the amino group) to produce energy or be converted into glucose or fat.
3. Step 3: Analyze the option 'Stored in the liver for later use.' Amino acids are not stored in the body like carbohydrates (as glycogen) or fats (as triglycerides). Instead, they are used immediately for protein synthesis, energy production, or other metabolic processes.
4. Step 4: Eliminate incorrect options. The first two options ('Used to build non-protein, nitrogen-containing products' and 'Deaminated and converted to glucose or fat for energy') are valid fates of amino acids. The option 'Stored in the liver for later use' is incorrect because amino acids are not stored in the liver.
5. Step 5: Conclude that the correct answer is 'Stored in the liver for later use,' as it is NOT a potential fate of amino acids from dietary proteins.