951. Which of the following structures is expected in a bacterium?
A. Nucleus
B. Plasma membrane
C. Golgi apparatus
D. Endoplasmic reticulum

952. Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
A. Mitochondrion
B. Lysosome
C. Golgi apparatus
D. Endoplasmic reticulum

953. Which of the following is the basis of first dimension of separation for two-dimensional electrophoresis?
A. Molecular mass
B. Solubility
C. Isoelectric point
D. Folding

954. What is meant by rotating frame of reference?
A. That the sample is spun rapidly in the applied field
B. If the laboratory itself is imagined to be rotated at the Larmor frequency, viewing that individual magnetic moment vectors are fixed in space
C. That the detector rotates around the sample
D. None of the above

955. The sequence of amino acids in proteins can be determined by means of
A. identification of the -NH2 terminal amino acids
B. identification of the -COOH terminal amino acids
C. partial cleavage of the original polypeptide into smaller polypeptides
D. all of the above

956. Why is it advantageous to record many FID signals from the same sample and then add them together?
A. To ensure that all target nuclei in the sample have been excited
B. To remove inaccuracies caused by fluctuations in the applied magnetic field
C. To increase sensitivity
D. None of the above

957. In FT-NMR, how are nuclei excited?
A. By radio-frequency radiation whose frequency is swept across a predetermined range
B. By an intense pulse of radiation which contains a wide range of frequencies
C. By an intense pressure
D. None of the above

958. Hydrogen bonds in a-helices are
A. more numerous than Vander Waals interactions
B. not present at Phe residues
C. analogous to the steps in a spiral staircase
D. roughly parallel to the helix axis

959. The peptide bond in proteins is
A. only found between proline residues
B. usually cis unless proline is the next amino acid
C. usually trans unless proline is the next amino acid
D. is planar because of steric hinderance

960. The molecular formula for glycine is C2H5O2N. What would be the molecular formula for a linear oligomer made by linking ten glycine molecules together by condensation synthesis?
A. C20H50O20N10
B. C20H32O11N10
C. C20H40O10N10
D. C20H68O29N10

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