Amino Acids Quiz
1. The molecules in this figure are:
OPTICAL ISOMERS AND HYDROPHILIC
2. An amino acid is considered both an acid and a base because it has an amino acid and a carboxyl function group, which are ionized by the addition or loss of
A HYDROGEN ION
3. Peptide chains have an ____ and a ____ end
N TERMINUS; C TERMINUS
4. A peptide linkage forms between
AN AMINO GROUP AND A CARBOXYL GROUP
5. Leucine and valine have side chains that ___, and thus are ____
CONSIST ONLY OF C AND H; HYDROPHOBIC
6. Aspartic acid and glutamic acid have side chains that _____, and thus are _____
ARE ACIDID, HYDROPHILIC
7. All three of the amino acids shown
ARE HYDROPHILIC
8. A disulfide bridge is formed by
TWO CYSTEINE SIDE CHAINS
9. The amino acid that contains a weakly acidic “phenolic” group is
TYROSINE
10. Which amino acids contain reactive aliphatic hydroxyl groups?
SERINE AND THREONINE