Question

    Which of the amino acid is not essential in

    diet:
    A Tyrosine Correct Answer Incorrect Answer
    B Tryptophan Correct Answer Incorrect Answer
    C Phenylalanine Correct Answer Incorrect Answer
    D Lysine Correct Answer Incorrect Answer

    Solution

    Tyrosine is non-essential (synthesized from phenylalanine). Tryptophan, phenylalanine, and lysine are essential (diet-dependent). 

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