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.   glycine.
C.   alanine.
D.   proline.
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.   cysteine
B.   methionine
C.   glycine
D.   serine
E.   proline
Question #3
The amino acid ______ has its R group connected to both the alpha-carbon and the amino group nitrogen through covalent bonds.
A.   glycine
B.   proline
C.   methionine
D.   cysteine
E.   histidine
Question #4
The amino acid phenylalanine is:
A.   both aliphatic and hydrophobic.
B.   both aromatic and hydrophilic.
C.   both aliphatic and hydrophilic.
D.   both aromatic and aliphatic.
E.   both aromatic and hydrophobic.

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