Why does HIV cause disease in people?
A) It produces a toxin.
B) It destroys helper T cells.
C) It stimulates the growth of memory cells.
D) It causes the loss of plasma nutrients.
B
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Nurse cells
A. transcribe bicoid mRNA and then transport it to the embryo. B. translate bicoid mRNA into protein. C. induce the embryo to transcribe and translate bicoid mRNA. D. transport Bicoid protein to the embryo. E. translate bicoid mRNA into protein and transport the protein to the embryo.
Refer to the accompanying figure. The root of the tooth is made up of the parts labeled:a
4 and 5 only b. 3, 4, and 5 only c. 1, 2, and 3 only d. 1, 2, 3, and 4 only e. 1, 2, 3, 4, 5
Eukaryotic ribosomes recognize and initially bind to what structure on the mRNA?
a. A Shine-Dalgarno sequence b. The 7-methylguanosine cap c. A TATA sequence d. A CCAAT sequence
A possible sequence of nucleotides in the template strand of DNA that would code for the polypeptide sequence phe-leu-ile-val would be
A. 5' TTG-CTA-CAG-TAG 3'. B. 3' AAA-AAT-ATA-ACA 5'. C. 3' AAA-GAA-TAA-CAA 5'. D. 5' AUG-CTG-CAG-TAT 3'. E 3' AAC-GAC-GUC-AUA 5'.