Question

.......... amino acids out of 20 contributes hydrophobic properties to the protein.

• A. Serine
• B. Histidine
• C. Tyrosine
• D. Leucine

Answer 1

The correct option is D Leucine

Serine and tyrosine both have polar alcoholic group as side chains. Leucine has non polar side group therefore is hydrophobic. The side group in leucine is aliphatic isobutyl. Histidine has a basic polar side group. The side group in histidine is an imidazole aromatic group.

Thus, the correct answer is option D.