Why do histone genes have the slowest molecular clock?
A. The structure of the histone gene must be
conserved for DNA to function properly.
B. Histone genes simply do not have the
same rate of mutations.
C. DNA-correcting mechanisms function
more readily with histone genes.
D. Cells have more histone genes than any
other kind of gene.
E. Histone genes normally have selfcorrecting
mechanisms.
A
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What basal transcription factor is most often affected by regulatory transcription factors?
A. TFIIB B. TFIID C. TFIIE D. TFIIF
The phenotypic differences between chimps and humans is best explained by _____
a. the high variation in the number of different genes between the two species b. the high number of inversion sequences c. epistatic changes to genes d. patterns of gene expression and regulation e. the large amount of “junk DNA” found in chimpanzee genomes
The laboratory procedure for copying selected segments of DNA is
A. the polymerase chain reaction. B. translation. C. jumping genes. D. a point mutation.
Which sequence of events is required for the brain to interpret sound?I.Vibration of the basilar membrane relative to the tectorial membrane causes cilia on hair cells to bend and triggers depolarization.II.Hair cells stimulate the production of action potentials in sensory neurons that project to the brain.III.Ganglion cell axons transmit action potentials to the occipital lobe.
A. II then I B. III then I then II C. I then II D. III then I E. I then II then III