Biology 251 - Genetics » Spring 2021 » Topic 11.1 Quiz

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Question #1
The amino acid below that has no side chain is:
A.   tryptophan.
B.   proline.
C.   glycine.
D.   alanine.
E.   cysteine.
Question #2
Two side chins from the amino acid ____________ can form covalent bonds that connect different parts of the same polypeptide or different polypeptides.
A.   serine
B.   glycine
C.   proline
D.   methionine
E.   cysteine
Question #3
The amino acid ______ has its R group connected to both the alpha-carbon and the amino group nitrogen through covalent bonds.
A.   histidine
B.   methionine
C.   glycine
D.   proline
E.   cysteine
Question #4
The amino acid phenylalanine is:
A.   both aliphatic and hydrophilic.
B.   both aromatic and hydrophilic.
C.   both aromatic and hydrophobic.
D.   both aliphatic and hydrophobic.
E.   both aromatic and aliphatic.

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