Disulfide bridges can form between two residues of
A) arginine
B) cysteine
C) glycine
D) proline
E) histidine
Ans: B) cysteine
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What organ aids in the camouflage of a fish by making the ventral surface light?
a. Chromatophores b. Epiphores c. Photophores d. Mesophores
The deer population in many parts of the northeastern United States is perceived to be out of control. What solutions to this problem would you deem to be the most feasible? (Select and defend one or more of the solutions listed below.) a. Increasing human predation by increasing the length of hunting season . b. Lowering the birth rate of the deer by putting out feed laced with
birth-controlchemicals. c. Increasing the rate of predation by re-introducing natural predators such asbobcats and mountain lions. d. There is no absolute correct answer to this question since each choice, althoughit will impact the deer population, has its pros and cons.
How could you genetically modify an animal so that it would distinguish more shades of green?
A) Induce genes to produce a greater number of cone cells in the fovea. B) Introduce genes for different opsins that respond in the green region of the spectrum. C) Introduce genes to produce green fluid in the eyeball, because green fluids will not absorb green light. D) Induce increased production of cGMP to increase opening of cGMP-gated sodium channels.
Low-level disinfectants are sufficient to remove microbes from which of the following equipment tiers?
A) semicritical B) nonessential C) noncritical D) vital E) non-vital