The reaction: pyruvate + CoA + NAD+ ? acetyl CoA + CO2 + NADH, is catalyzed by pyruvate dehydrogenase. If an inhibitor of this enzyme was added to cells, then ___ levels in the cytoplasm would increase.
A. NADH
B. Pyruvate
C. Acetyl CoA
D. CO2
B. Pyruvate
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In comparing smooth and cardiac muscle, which one of the following best describes the differences between the two muscle types?
A) Smooth muscle is voluntary, whereas cardiac is involuntary. B) Both lack muscle filaments, but cardiac muscle has sarcomeres. C) Cardiac muscle requires periods of relaxation, whereas smooth muscle is always in a state of partial contraction. D) Cardiac muscle filaments are arranged in bundles, whereas smooth muscles lack filament bundles. E) Cardiac muscle contracts slowly compared to smooth muscle.
Identify the viral disease from the list below:
A) botulism B) influenza C) anthrax D) ringworm
The part of the brain that deals with the basic drives such as hunger and thirst is the
a. cerebrum. b. pons. c. cerebellum. d. thalamus. e. hypothalamus.
Which of the following is not a process in the scientific method?
A. systematic observation B. belief in a preconceived idea C. formulate a hypothesis D. development of a theory E. laboratory experimentation