A nephron____
a. is a kidney tubule
b. replaces the blood
c. forms feces
d. connects the kidneys to the bladder
e. is the functional unit of the kidney
ANSWER: e
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Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, an early step of glycolysis. In the presence of oxygen, an increase in the amount of ATP in a cell would be expected to _____
A) inhibit the enzyme and thus slow the rates of glycolysis and the citric acid cycle. B) activate the enzyme and thus slow the rates of glycolysis and the citric acid cycle. C) inhibit the enzyme and thus increase the rates of glycolysis and the citric acid cycle. D) activate the enzyme and thus increase the rates of glycolysis and the citric acid cycle. E) inhibit the enzyme and thus increase the rate of glycolysis and the concentration of citrate.
Normal biota generally exist in either a _______ or _________ association with their hosts
Fill in the blank(s) with the appropriate word(s).
A population reaches a stable-age distribution when the
A) population stops growing. B) birthrate is less than the death rate. C) net reproductive rate (R0 ) is zero. D) proportion of individuals in each age group remains the same.
The three steps that take place in each cycle during PCR occur in which order?
A. DNA synthesis, denaturation, and annealing B. DNA denaturation, annealing, and synthesis C. DNA annealing, denaturation, and synthesis D. DNA denaturation, synthesis, and annealing