Which of the following is a form of active transport?
A. Osmosis
B. Facilitated diffusion
C. Simple diffusion
D. Sodium–potassium pump
E. Glucose transporter
Answer: D
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Attenuation is a type of regulation that can control
A) allosteric enzyme activity. B) transcriptional activity exclusively. C) translational activity exclusively. D) both transcriptional and translational activity.
In photosynthesis, carbon fixation occurs:
A. during photorespiration B. in photosystem II C. in the Calvin cycle D. in photosystem I E. in the electron transport chain
In the formula for determining a population's genotype frequencies, the "2" in the term 2pq is necessary because _____
A) the population is diploid B) heterozygotes can come about in two ways C) the population is doubling in number D) heterozygotes have two alleles
Which genera is likely the most recent ancestor of the genus Homo?
A. Ardipithecus B. Pan C. Sahelanthropus D. Paranthropus E. Australopithecus