Why is it not surprising that AIDS patients frequently suffer a viral-induced tumor?
A. HIV genomes integrate into the host cell chromosome. This integration might result in loss of control of the cell cycle (also known as cancer).
B. The immune system's CD4+ T cells are directly responsible for elimination of tumor cells. HIV attacks them and eliminates them, making a person more susceptible to cancer.
C. The therapies for HIV are highly mutagenic, which may lead to cancerous states in people taking the drug regimen.
D. Products of an active HIV infection are highly mutagenic-so, as a person's illness progresses, these mutagenic compounds build up and are more capable of inducing a cancerous state.
A
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Which enzyme is responsible for synthesizing an RNA strand from a DNA template strand?
a. RNA polymerase b. RNA ligase c. DNA ligase d. DNA polymerase
The epipelagic refers to the location of pelagic animals that can extend down to:
a. 10 m. b. 20 m. c. 100 m. d. 200 m. e. 1000 m.
How many passes through the Krebs cycle are required
to break down a glucose molecule completely? a. 2 b. 3 c. 4 d. 6 e. 12
If this structure were nibbled off by browsing deer, it would decrease the potential for an increase in height of the plant.
A. the terminal bud B. the leaf scar C. the axillary bud D. the stem E. the bark