Which one of the following occurs when bright light hits the eye?
A) The muscle arranged circularly around the iris relaxes.
B) The pupil dilates.
C) The photoreceptors no longer respond to the light.
D) The pupil decreases in size.
E) The muscle arranged radially around the iris contracts.
D
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Which of the following types of ATPase pumps are sensitive to vanadate (which inhibits phosphorylation of the pump during its activity mechanism)?
A) P type B) V type C) F type D) ABC type E) All are inhibited by vanadate.
The ATP synthase Fo complex is inhibited by the antibiotic ________, as indicated by the "o."
Fill in the blank with correct word.
During the initiation step of transcription, which molecule binds the promoter region of a DNA molecule?
A) DNA polymerase B) Reverse transcriptase C) RNA polymerase D) DNA primase E) Topoisomerase
Plasmids
A. are found in all bacteria. B. are essential for survival. C. cannot be passed between organisms. D. cannot be passed on to progeny. E. are often the site of pathogenic genes.