Why is AIDS such a deadly disease?

A. Because it is caused by a virus.
B. Because they have not isolated the virus yet that causes AIDS.
C. Because the virus cripples the immune system.
D. The body does not recognize the virus as foreign.
E. It is a sexually transmitted virus.


Answer: C. Because the virus cripples the immune system.

Biology & Microbiology

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The mutation frequency would be the same for all genes in a given culture

Indicate whether the statement is true or false

Biology & Microbiology

What specific amino acid difference did you discover between normal and sickle-cell betaglobin?

a. Glutamine is replaced by valine. b. Valine is replaced by glutamic acid. c. Glutamic acid is replaced by valine. d. No differences were detected.

Biology & Microbiology

Animals with chemical defenses are also typically:a

fast runners. b. aposematic. c. small in size. d. large in size. e. camouflaged.

Biology & Microbiology

The general transcriptional machinery is composed of the regulatory proteins bound to the promoter of a eukaryotic

gene. Indicate whether the statement is true or false.

Biology & Microbiology