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