Question

Single letter symbol $F$ is used for the amino acid

• A. Phenylalanine $\left(Phe\right)$
• B. Proline $\left(Pro\right)$
• C. Tryptophan $\left(Try\right)$
• D. Methionine $\left(Met\right)$

Answer 1

The correct option is A Phenylalanine $\left(Phe\right)$

Phenylalanine is an amino acid with chemical formula C${}_9$H${}_{11}$NO${}_2$. It is a precursor for tyrosine. It is also present in the breast milk of the mammals. Tyrosine is the precursor of phenylalanine. Phenylketonuria is a genetic disorder which is caused due to the inability to metabolize the phenylalanine due to lack of enzyme phenylalanine hydroxylase. It is denoted by letter F.

So, the correct answer is option A.