The human immunodeficiency virus mounts a direct attack on TH cells by recognizing the _______ surface proteins associated with these cells.
A. Fc
B. CD4
C. epitope
D. cytokine
B. CD4
Biology & Microbiology
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The pigment most involved with photoperiodism is ____.
A. chlorophyll B. xanthophyll C. anthocyanin D. phytochrome E. phycoerythrin
Biology & Microbiology
If the phage types of isolates are identical, and a connection exists between the isolates, the chances are great that they are epidemiologically related.
A) True B) False
Biology & Microbiology
All of the following can be recognized by toll-like receptors, except
A. flagellin. B. host cell membrane proteins. C. single-stranded viral RNA. D. lipopolysaccharide. E. lipoteichoic acid.
Biology & Microbiology
What hormone is tested for in pregnancy tests?
A. Luteinizing hormone B. Follicle stimulation hormone C. Progesterone hormone D. hCG hormone E. Estrogen hormone
Biology & Microbiology