Drugs like aziodothymidine (AZT) work against HIV infections by inhibiting

A. the cleaving of proteins needed to make the protein coat of a virus.
B. host cells from reproducing.
C. viral DNA from inserting into the host chromosome.
D. viruses from entering a host cell.
E. reverse transcriptase.


E. reverse transcriptase.

Biology & Microbiology

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The acquisition of traits necessary for complex multicellularity occurred independently in plants and animals, but took place in a specific order. In what order did these processes evolve?

A. cell adhesion molecules, a mechanism of communication, bulk transport capability B. bulk transport capability, a mechanism of communication, cell adhesion molecules C. a mechanism of communication, bulk transport capability, cell adhesion molecules D. a mechanism of communication, cell adhesion molecules, bulk transport capability

Biology & Microbiology

Gamma irradiation

A. has not been approved for use on food. B. can be used to either sterilize or pasteurize, depending on the dose of radiation. C. leaves some radioactive particles in the treated substance. D. usually kills by generating heat and denaturing proteins.

Biology & Microbiology

Which vessel, A, B, C, or D, carries blood to the human lungs?

1.A 2.B 3.C 4.D

Biology & Microbiology

Which organisms produce antibiotics?

A. Animals B. fungi C. protozoa D. bacteria

Biology & Microbiology