X-ray crystallography yields all of the following except:
A. a two-dimensional diffraction pattern.
B. an initial protein model with the location of amino acid residues.
C. a model structure created through refinement.
D. information about the protein structure when in solution.
E. information on the structure of the majority of characterized proteins.
Figure 5-17 shows the approximate Km for the hydrolysis of ATP by helicase PcrA to be:
A. 3 M.
B. 5 M.
C. 10 M.
D. 15 M.
E. 20 M.
Which of the following polymerases functions in translesion synthesis and is considered error-prone because it lacks the 3'-5' exonuclease activity used for proofreading?
A. DNA Pol I
B. DNA Pol II
C. DNA Pol III
D. DNA Pol IV
E. None of these choices is correct.
The human microbiome is best described as:
A. bacteria associated with the body.
B. bacteria and fungi associated with the body.
C. bacteria, fungi, and archaea associated with the body.
D. viruses that have integrated their genomes into the human genome.
E. bacteria, fungi, and archaea that have integrated their genomes into the human genome.
Protein disulfide isomerase:
A. reduces disulfide bonds.
B. facilitates posttranslational modification of a protein.
C. catalyzes the breakage and formation of disulfide bonds.
D. reduces disulfide bonds and facilitates posttranslational modification of a protein.
E. reduces disulfide bonds, facilitates posttranslational modification of a protein, and catalyzes the breakage and formation of disulfide bonds.
Quick Reply
