Which amino acid side chain would not be expected to partici

Which amino acid side chain would not be expected to participate in covalent catalysis?

a. lys

b. cys

c. ser

d. leu

e. his

Which of the following amino acids contains a secondary amine?

a. histidine

b. serine

c. glutamate

d. arginine

e. proline

Which amino acid is most likely to have a net positive charge at a pH of 7.0?

a. aspartic acid

b. glutamine

c. histidine

d. lysine

Solution

The amino acid side leu (option - d) side chain would not be expected to participate in covalent catalysis. The amino acid Proline ( option-e) contains the secondary amine group. Amino acid lysine (option-d) is most likely to have net positive charge at neutral pH.