Question

how is an hiv infection different from a cold virus infection?
a. hiv diffuses across membranes.
b. hiv attacks lymphocytes directly.
c. hiv is killed by lipases.
d. hiv replicates itself inside cells.

Explanation:

Cold viruses cause symptoms like a runny nose. HIV specifically targets lymphocytes (T - cells). This weakens the immune system. Option A: Many viruses can cross membranes. Option C: Lipases don't specifically target HIV. Option D: Many viruses replicate inside cells. So, the key difference is HIV's direct attack on lymphocytes.

Answer:

B. HIV attacks lymphocytes directly.