Question Detail
Question
Which one of the following is a non-essential amino acid in the case of human beings?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Non-essential amino acids are those that the human body can synthesize from other precursors and do not need to be obtained from the diet. Serine is a non-essential amino acid. Arginine is conditionally essential (required in certain conditions like growth), histidine is essential for infants and considered conditionally essential for adults, and leucine is an essential amino acid.
Hint
Distinguish between amino acids that must be obtained from diet versus those that can be synthesized by the body.