Which of the following statements is NOT correct about a circadian rhythm?
A. The primary usefulness of circadian rhythms seems to be to measure day-length changes so plants respond appropriately to seasonal environmental changes.
B. These rhythms tend to persist even in the absence of daily light cues.
C. An example is the opening of stomata in the morning and their closing at night.
D. If plants are maintained in total darkness or total light, their circadian rhythm acts on a faster time scale.
Answer: D
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Which of the following processes is central to the initiation of transcription?
A) binding of sigma to the promoter region B) formation of a phosphodiester bond in the elongating RNA strand C) binding of DNA polymerase to the promoter region D) formation of a DNA primer
Sensory information is transmitted to the CNS by the ____
a. efferent neurons of the autonomic nervous system b. afferent neurons of the peripheral nervous system
c. somatic neurons of the peripheral nervous system d. somatic neurons of the sympathetic division e. efferent neurons of the sympathetic division
process of translation can be broken down into three basic steps. Which of the following is NOT one of these?
A. initiation B. elongation C. translocation D. termination
If any of the proteins involved in mismatch repair are damaged, the mutation rate and cancer risk will rise; this is called the ___________.
a) alteration phenotype b) stability phenotype c) mutator phenotype d) alteration genotype e) mutator genotype