During cell reproduction, chromatin fibers coil up into structures called
A) ribosomes.
B) lysosomes.
C) chromosomes.
D) nucleoli.
Answer: C
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An epitope is _____
A) part of the interferons that penetrate foreign cells B) a protein protruding from the surface of B cells C) two structurally similar antibodies dissolved in the blood plasma D) the part of an antigen that actually binds to an antigen receptor E) a mirror image of an antigen
Over time, a sensory neuron will decrease its responsiveness to a specific signal. This
A. accommodation B. appreciation C. adaptation D. alleviation
Geraldo isolated an E. coli strain in which a mutation has hampered the capacity of the cAMP activator to bind the promoter of the lactose operon. How will this mutation affect transcription of the lactose operon when the E. coli cells are exposed to the following conditions?
a. Lactose and glucose are both available. b. Lactose is available but glucose is not. c. Both lactose and glucose are absent.
Anemia refers to
a. too many or abnormal red blood cells. b. too few or abnormal white blood cells. c. too few or abnormal red blood cells. d. too many or abnormal white blood cells. e. a form of leukemia.