When oxygen is present
A) most bacteria and yeasts carry on fermentation.
B) most animals convert CO2 to glucose.
C) most animal cells carry on fermentation and produce lactate.
D) two ATP molecules are produced for each glucose molecule.
E) most animal cells utilize aerobic cellular respiration.
E
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The process during which potassium and hydrogen
ions, penicillin, and some toxic substances are put into the urine by active transport is a. tubular secretion. b. reabsorption. c. filtration. d. countercurrent multiplication. e. diffusion.
A(n) ________ is a photograph using X-ray film that is used to identify the position of radiolabeled molecules on a gel
A) Southern blot B) northern blot C) X-rayogram D) autoradiogram E) radiocopy
What purpose do restriction enzymes play in bacterial cells?
a. Restriction enzymes prevent the overproduction of mRNA in the bacterial cell. b. Restriction enzymes attack bacteriophage DNA when it enters the cell. c. Restriction enzymes promote bonding of the RNA polymerase to the promoter. d. Restriction enzymes limit the rate of bacterial replication. e. Restriction enzymes connect Okazaki fragments.
Enzymes are
A. fats. B. sugars. C. starches. D. proteins.