46 A female rat has a large sexually dimorphic nucleus (SDN). What is the most l

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46 A female rat has a large sexually dimorphic nucleus (SDN). What is the most likely cause?

Select one:

a. She has androgen insensitivity

b. She was exposed to elevated testosterone levels at some point in early development

c. She likely has a mutation in the gene encoding 5-reductase

d. Her MIS levels during early development were very low

Question 47

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47 How does viral load change over the course of an untreated HIV infection?

Select one:

a. It rises quickly at the start of the infection, decreases for a period of time, and then rises again at the end of the infection when the symptoms of AIDS become apparent.

b. It is low throughout the infection.

c. It is initially high and then decreases throughout the course of the infection.

d. It is high only at the end of the infection when AIDS becomes apparent.

Question 48

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48 Which of the following could probably be treated effectively with an antibiotic?

Select one:

a. A herpes infection

b. A syphilis infection

c. An HIV infection

d. An HPV infection

Question 49

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49 Which of the following comes first during an infection of a host cell by HIV?

Select one:

a. Making viral DNA using viral RNA as a template

b. Making new viral proteins using viral RNA as a template

c. Making new viral RNA using viral DNA as a template

d. Inserting viral DNA into the host cell’s DNA

Question 50

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50 How do reverse transcriptase inhibitors work in the treatment of HIV infections?

Select one:

a. They prevent the synthesis of viral DNA using viral RNA as a template

b. They prevent fusion of the virus with host cells

c. They block the translation of new viral proteins from viral RNA

d. They prevent the synthesis of new viral RNA from the host’s DNA

Explanation / Answer

46. B

Elevated testoterone increase the sexually dimorphic nucleus

47. A

48. D

49. A

50. A

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