Which of the following is the target site of the antimicrobial Chloramphenicol?
A. Membrane
B. Peptidoglycan synthesis
C. Ribosome
D. RNA synthesis
E. Topoisomerase
Ans: C. Ribosome
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Osmosis involves
a. the movement of a solvent, like water. b. differences in solute concentrations. c. movement from hypotonic to hypertonic solutions. d. all of these except e. e. all of these except c and d.
A drug that blocks the reuptake of the neurotransmitter serotonin ____
a. decreases the concentration of serotonin in the synapse b. can be used to elevate mood c. affects respiratory activity d. is used to treat hypertension e. enhances neurotransmitter release
The translocation process requires:a
no additional energy. b. activation of the P site. c. the input of two ATP molecules to supply the needed energy. d. energy supplied by GTP. e. phosphorylation of the mRNA molecule
The plasma membrane barrier to passive diffusion is primarily a function of the membrane's
a. phospholipids. b. cholesterol. c. proteins. d. glycoproteins.