Structure and Properties of Amino Acids - Medical Science

Q1:

What is the heaviest of the twenty amino acids?

A Phenylalanine

B Tryptophan

C Tyrosine

D Histidine

ANS:B - Tryptophan

Molecular masses:

Tryptophan 204.

Phenylalanine 165.

Tyrosin 181.

Histidine 155.