Question

Steps in the metabolism of Tyrosine.

A. Phenylalanine \(\xrightarrow{\text{Phenylalanine hydroxylase}}\) Tyrosine

B. Homogentisate \(\rightarrow\) Fumarate

C. Tyrosine \(\xrightarrow{\text{Tyrosine Transaminase}}\) hydroxyphenyl pyruvate

D. Phenylalanine \(\xrightarrow{\text{Phenylalanine dehydrogenase}}\) Homogentisate

Choose the correct answer from the options given below:

• A. A and B only \
• B. A, B and D only \
• C. C and D only \
• D. A and C only

Hint:

Phenylalanine Hydroxylase adds an $-\text{OH}$ group to Phenylalanine to create Tyrosine, which is then targeted by Tyrosine Transaminase.

Answer 1

The Correct Option is D