Because it has no introns, researchers prefer to use
__________ when working with eukaryotic genes.
a. cDNA
b. single-stranded DNA
c. hybridized DNA
d. bacterial DNA
e. viral DNA
Answer: a
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Which of the following statements are not true of hormone actions in plants?
A. Most plant hormones are effective in extremely low concentrations. B. Plant hormones influence cell growth and differentiation. C. Plant hormones may alter patterns of gene expression and rates of cell division. D. Plant hormones act independently and do not affect one another's actions. E. Plant hormones play a central role in plant development. Answer Point Value: 1.0 points
A mutation in the RecC subunit of the RecBCD complex would likely have what effect?
A. The enzyme would be unable to recognize chi sites, unwinding and degrading both strands. B. The 3'-ending strand would be degraded faster than the 5'-ending strand. C. The enzyme would not be able to bind RecA. D. The enzyme would be unable to carry out its major function, which is fork regression. E. The enzyme would be able to perform strand invasion without RecA.
The cell cycle is shown in this diagram. During which phase is the cytoskeleton dismantled?
a. G1
b. S
c. G2
d. Cytokinesis
The ability of glucose to repress the lac operon depends on which effector molecules?
A. cAMP B. allolactose C. starch D. tryptophan E. ADP