RNA interference functions by
A) degrading the protein encoded by a specific mRNA.
B) degrading the RNA strand that is encoded by the Slicer gene.
C) transcribing double-stranded RNA into protein.
D) disrupting the chromosomal copy of the gene.
E) degrading the RNA complementary to the short, double-stranded RNA.
E
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Among these contraception methods, the highest risk of accidental pregnancy accompanies _____
A) the use of a diaphragm B) the use of a condom C) the practice of coitus interruptus D) a verified vasectomy E) the practice of the "rhythm method"
Which cells target parasites and worms?
a. eosinophils b. B and T cells c. macrophages d. phagocytes e. cytokines
Which is an accurate pairing of a key excretory function with its definition?
a. Filtration happens when blood pressure forces water, nitrogenous waste, and valuable solutes from the blood into the collecting duct. b. Reabsorption is the reclamation process that returns valuable solutes and water to the nephron from the capillaries. c. Secretion transports certain toxins, drugs, and excessive ions from the filtrate to the capillaries. d. Excretion moves urine, the processed filtrate, out of the kidney, through the ureter, the bladder, and finally out of the body via the urethra. e. Reabsorption is the process in which toxins, drugs, and excessive ions that remain in the blood after filtration are transported into the nephron for disposal in the urine.
Which of the following is an active enzyme?
A) apoenzyme B) cofactor C) coenzyme D) holoenzyme E) subtrate