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Which of the following is an essential amino acid?

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Which of the following is an essential amino acid?

(a) Cysteine

(b) Asparagine

(c) Glutamine

(d) Phenylalanine

I have been asked this question in an internship interview.

My doubt is from Amino Acids in chapter Amino Acids, Peptides and Proteins of Biochemistry

1 Answer

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Best answer
The correct choice is (d) Phenylalanine

Explanation: Phenylalanine is one of the 9 essential amino acids.

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