What sort of virus is shown in the photo below?
a. herpesvirus
b. retrovirus
c. bacteriophage
d. tobacco mosaic virus
c. bacteriophage
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The reason(s) that the body has such difficulty combating HIV infection and preventing progression to AIDS is because
A. HIV mutates slowly. B. HIV targets both humoral and cell-mediated immunity. C. HIV blocks antigen recognition by macrophages. D. HIV destroys MHC molecules. E. HIV blocks the inflammatory response.
Four of the five answers listed below are related by a common chemical similarity. Select the
exception. a. cellulose b. hydrochloric acid c. amino acid d. protein e. nucleic acid
Compare and contrast DNA synthesis in prokaryotes and eukaryotes. What will be an ideal response?
Which of the following statements about the mRNA start codon is INCORRECT?
A. The start codon specifies the amino acid methionine. B. The start codon is only a few nucleotides from the ribosomal binding site. C. The start codon defines the reading frame. D. The start codon is usually GGA. E. The start codon is usually AUG.