What is the fate of pyruvic acid in an organism that uses aerobic respiration?
A) It is reduced to lactic acid.
B) It reacts with oxaloacetate to form citrate.
C) It is oxidized in the electron transport chain.
D) It is catabolized in glycolysis.
E) It is converted into acetyl CoA.
E
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The "missing link" between birds and dinosaurs was found when fossils of ________ were unearthed in a German quarry
a. Archaeopteryx b. Phascolarctos cinereus c. Sphenodon d. Saurophaganax
If a person is diagnosed with lactose intolerance, which of the following is likely?
A. Eating dairy foods would be lethal. B. This person could only drink milk. C. Eating dairy products could cause gastrointestinal pain. D. Eating fatty foods would be lethal. E. Digesting sugars is no longer possible.
__________ species of many plants (and a few
animals) originated by chromosome doublings and hybridizations. Fill in the blank(s) with the appropriate word(s).
HIV causes acquired immunodeficiency by infecting
A. B cells. B. helper T cells. C. cytotoxic T cells. D. thymus cells. E. both B and cytotoxic T cells.