The structure of the anti-HIV drug azidothymidine (AZT) includes a phosphate group, a sugar group, and a nitrogen base, in the form of a nucleotide. Given its structure, how do you think it blocks viral replication?
A. It inhibits host T cells from replicating.
B. It blocks RNA synthesis by an enzyme.
C. It prevents HIV from entering the cell.
D. It blocks host cell DNA synthesis by an enzyme.
E. It inhibits the assembly of new viruses in the cell.
D. It blocks host cell DNA synthesis by an enzyme.
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Which of the following animals reproduce through internal fertilization?
a. Crabs b. Frogs c. Oysters d. Chickens
If you are blood type A,
a. your immune system will recognize blood cells with type B markers as foreign. b. you carry markers for type B blood. c. you can donate blood to a person with type O blood. d. you can receive blood from a person with type AB blood. e. none of these are true.
Arp2/3-dependent actin polymerization directly drives which of the following activities at the leading edge of crawling cells?
A) filament rearward translocation B) lamellipodia protrusion C) new adhesion formation D) generation of tension E) focal adhesion detachment
The fascial layer that covers the deep surface of the transverse abdominal muscle is known as which of the following?
(A) parietal peritoneum (B) deep fascia (C) transversalis fascia (D) Scarpa's fascia (E) Camper's fascia