alleryThe primary target of HIV in humans is
AB lymphocytes only through Ig receptors
BPlatelets involved in clot formation
CErythrocytes carrying oxygen in blood
DHelper T lymphocytes with CD4 receptors
Answer & Solution
Correct answer: D. Helper T lymphocytes with CD4 receptors
1. HIV binds the CD4 receptor on the surface of helper T lymphocytes.
2. The progressive loss of helper T cells cripples adaptive immunity.
3. Individuals then become vulnerable to opportunistic infections and cancers.
4. Full-blown AIDS is diagnosed when the CD4 count drops below a threshold.
_Source: syllabus Biology, Ch 7 "Human Health and Disease", §7.3_
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