Thinking critically, one flaw with the Olestra experiment is that ________
a. people were offered bags containing different quantities of chips and intake was not measured
b. experimental subjects were discouraged from moving about during the experiment
c. 89 people who ate Olestra chips got stomach cramps but the researchers did not conclude that Olestra causes cramps
d. people were all offered bags containing the same amount of chips but intake was not measured
d
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If the gene pools of allopatric populations did not differentiate much during geographical separation, then upon
reestablishing contact, the populations may interbreed and merge into one. This phenomenon is called ____.
a. species clustering b. divergence c. hybridization d. species fusion
e. convergenceOf the following, which statement is false regarding the characteristics of mitochondria?
A. Mitochondria carry out photosynthesis. B. Mitochondria have their own DNA. C. Mitochondria are involved in extracting energy from nutrients. D. Mitochondria have two membrane layers. E. Mitochondria have cristae.
Refer to the metabolic pathway illustrated above. If A, B, and C are all required for growth, a strain mutant for the gene-encoding enzyme B would be able to grow on medium supplemented with _____
A) nutrient A only B) nutrient B only C) nutrient C only D) nutrients A and C
Hexokinase is an enzyme that binds specifically to glucose and converts it into glucose 6-phosphate. The activity of hexokinase is suppressed by glucose 6-phosphate, which binds to hexokinase at a location that is distinct from the active site. This is an example of.
A. allosteric activation. B. cofactor binding. C. feedback inhibition. D. competitive inhibition.