If you are designing an antibiotic that inhibits peptide bond formation, what enzyme would you target?
What will be an ideal response?
peptidyl transferase
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Integral membrane proteins
1.are embedded in the membrane. 2.sit on the surface of the membrane. 3.are easy to remove from the membrane. 4.are chains of simple sugars. 5.always go completely across the membrane.
In the cAMP signal transduction pathway, once a protein kinase is activated, which of the following
happens next? a. G protein is activated. b. Adenylyl cyclase is activated. c. GDP is replaced by GTP. d. cAMP is converted to ATP. e. The protein kinase activates a cellular response.
The cellular basis for bacterial resistance to antimicrobics include
A. synthesis of enzymes that alter drug structure. B. prevention of drug entry into the cell. C. alteration of drug receptors on cell targets. D. bacterial chromosomal mutations. E. All of these choices are correct.
Which of the following is NOT a characteristic of viruses?
A) They are visible with a light microscope. B) They are acellular. C) They are composed of genetic material and protein. D) They are typically smaller than prokaryotic cells. E) They are obligatory parasites.