Which of the following cells can serve as antigen-presenting cells?

a. macrophages, basophils, and B cells
b. dendritic cells, B cells, and T cells
c. macrophages, dendritic cells, and B cells
d. B cells, T cells, and basophils
e. macrophages, T cells, and basophils


C

Biology & Microbiology

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Describe the general structure of amino acids

What will be an ideal response?

Biology & Microbiology

Why has it been difficult to generate drugs to treat AIDS?

A. HIV mutates rapidly among infected humans. B. People with HIV infections die very rapidly, before the drugs have a chance to cure them. C. HIV does not cause AIDS. D. HIV does not use any enzymes that can be targeted by drugs. E. The only way to kill a virus is with a vaccine, not with drugs.

Biology & Microbiology

What is the function of reverse transcriptase in retroviruses?

A) It uses viral RNA as a template for DNA synthesis. B) It converts host cell RNA into viral DNA. C) It translates viral RNA into proteins. D) It uses viral RNA as a template for making complementary RNA strands.

Biology & Microbiology

During the elongation stage of translation, _____ are formed between _____.

A) covalent bonds, phosphate groups B) phosphate bonds, nucleotides C) hydrogen bonds, base pairs D) peptide bonds, amino acids

Biology & Microbiology