In which of the following do both amino acids have a basic side chain?
A) cysteine and glycine
B) cysteine and methionine
C) histidine and lysine
D) phenylalanine and tryptophan

Question

Quizplus · Accepted Answer

Histidine and lysine both have basic side chains, while cysteine and glycine have neutral or polar side chains, and phenylalanine and tryptophan have aromatic side chains. Methionine has a sulfur-containing side chain, which is polar but not basic.

In Which of the Following Do Both Amino Acids Have