Global warming is the result of
A) rising ocean levels.
B) rising concentrations of greenhouse gases.
C) increased solar activity.
D) habitat loss.
Answer: B
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If ?P = 0.3 MPa and ?S = -0.45 MPa, the resulting ? is _____
A) +0.75 MPa B) -0.75 MPa C) -0.15 MPa D) +0.15 MPa E) -0.42 MPa
Three critical amino acids in the active site of an enzyme are threonine, serine, and glutamic acid. Which of the following characteristics would you predict the substrate to possess in order to bind the active site of this enzyme?
A. relatively hydrophobic B. hydrophilic, with a negative charge C. hydrophilic, with a positive charge D. hydrophilic, but without a charge
Which of the following is generally true of eukaryotic promoters?
A. Regulatory regions lie within 200 base pairs of the promoter. B. The more complex the organism, the more complex its promoters. C. Promoters are under the control of a single regulatory sequence. D. RNA polymerase II exhibits high intrinsic affinity for promoter sequences.
Why is oil not degraded when in a natural habitat underground, yet susceptible to bioremediation in an oil spill?
A. The high pressure the oil is subjected to underground prevents bacteria from growing and consuming it. B. The bacteria can't be given the right amounts or types of nutrients to foster an increase in their number deep underground. Nearer the surface, human intervention can increase the factors that will raise the microbe quantity. C. The bacteria that degrade the oil require a higher than normal salt content, much like what is found in seawater. Underground, they lack this salt level. D. It IS degraded underground-but it happens at a much slower rate because a portion of the cycle is photosynthetic in nature. This process is dramatically increased nearer to the water's surface.