BCHM Exam 2 study guide Questions and Answers (Solved Papers).

BCHM: Exam 2 study guide Questions and
Answers (Solved Papers)
Protein biosynthesis uses only L-amino acids - Correct Answers
✅TRUE
C
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All amino acids have a chiral α-carbon EXCEPT ________. - Correct
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Answers ✅glycine
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At pH=0, the net charge on a polypeptide will be negative. -
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Correct Answers ✅FALSE
co
nt
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An amide bond between the α-carboxylic acid group of one amino
acid and the α-amino group
tB
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on another is called a ________. - Correct Answers ✅peptide bond
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The chemical ________ can cleave amide bonds on the C-terminal
an



side of methionine
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residues. - Correct Answers ✅cyanogen bromide
gm
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Most proteins have blocked amino and carboxyl terminals. -
l.c



Correct Answers ✅FALSE
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When referring to the amino acid sequences of proteins,
sequence homology is the same as

, BCHM: Exam 2 study guide Questions and
Answers (Solved Papers)
sequence similarity. - Correct Answers ✅FALSE



Several homologous proteins can be aligned to provide a ________
C
on


sequence. - Correct Answers ✅consensus
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en


Applications of mass spectrometry include:
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A) determination of the mass of a protein.
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B) determining the primary structure of proteins.
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C) detection of post-translational modifications on proteins.
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D) A and B.
tB



E) A, B, and C. - Correct Answers ✅E
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nr
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________ chromatography is used to separate proteins based on
an


their surface charge. - Correct Answers ✅Ion exchange
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In considering protein secondary structure which of the following
is INCORRECT?
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l.c


A) An α helix repeats after 18 residues and has 3.6 residues per
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turn.

B) A network of main-chain hydrogen bonds connect β strands in
a β sheet.