I, (Name) _________________________________________ have neither received nor given help.
BMB 401/506-Fall 2007
Exam 1 September 18, 2007
During this exam you should not be in possession of
any electronic equipment (beeper, cellular phone,
earphone, iPods, etc.), books and papers, other than
the test. Please place all these materials in your book
bag (after you turn it off!!) and place the bag against
the wall of the room. During exam 1 you can only use
calculators that do not have memory capabilities for
alphabetic characters. Other calculators should also
be placed in your bag.
THESE ARE STANDARD ANSWER MULTIPLE
CHOICE QUESTIONS. THE POSSIBLE ANSWERS
ARE LABELED A, B, C, D AND E. SELECT THE
ANSWER AND MARK THE
APPROPRIATE CIRCLE ON THE SCANTRON
Bubble in your name and ID# (C#
please) and seat number. There are 43 questions. You
will receive full credit for 41 correct answers.
In figure 1 on page 5, identify 9-
In an α-helix all of the following are correct EXCEPT:
The –C=O group of each amino acid residue forms a
hydrogen bond with the NH group of the amino acid
that is situated four residues ahead in the sequence of
the same polypeptide chain.
Side chains of amino acids 1 and 4, 2 and 5, etc.
are hydrogen bonded.
Side chains radiate out from the helix.
Some amino acids are more prevalent in these helices
There are close to four amino acid residues per turn.
The side-chain of an asparagine residue in a protein: (all
statements are correct EXCEPT)
Can be positively charged
Can act as a hydrogen bond donor through a
hydrogen attached to nitrogen
Can act as a hydrogen bond acceptor at the =O
Can act as a hydrogen bond acceptor at its nitrogen
Which of the following represents a peptide bond?
All of the above
Which of the following amino acids can carry a
carbohydrate side chain
Asp, Gly, Ser
Glu, Gln, Thr
Ser, Thr, Asn
Ser, Thr, Tyr
Tyr, Trp, Lys
Whether or not an amino acid will carry a side-chain
carbohydrate depends on
The context of the amino acid (i.e. its neighbors and
near neighbors) in the primary structure
Whether the protein passes through the endoplasmic
reticulum and Golgi apparatus of the cell.
Both A and B are correct
Neither A nor B are correct.
All of the following are amphipathic molecules EXCEPT:
Which amino acid side chain can be positively charged at