A replicon
a. may or may not have an origin.
b. must include the gene for the protein that regulates initiation of replication.
c. must "fire" only once during the cell cycle.
d. must have a terminus.
e. is trans-acting.
Ans: c
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In a Giesma-stained karyotype, each chromosome can be identified by its unique pattern of:
A. supercoils. B. spirals. C. bands. D. coloration. E. None of the answer options is correct.
In which stages do internal checkpoints occur during the cell cycle?
a. Near the end of G1 and at the G2–M transition b. Only during metaphase c. Near the end of G1, at the G2–M transition, and during metaphase d. Only at the end of the G2–M transition
A decrease in blood pH would stimulate an increase in rate and depth of breathing.
a. true b. false
Which of the following showed their greatest diversity during the Mesozoic era, but were a small, less diverse group during the Paleozoic era?
A) gymnosperms B) fungi C) flowering plants D) mammals