Which of the following is NOT a function of the bacterial cytoskeleton?
A. constriction of a dividing cell
B. directing deposition of NAM & NAG molecules
C. localizing ribosomes in the cytoplasm
D. determining the location of the DNA
E. a form of motility
Answer: C
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Many health food stores carry enzyme preparations intended for oral ingestion (by mouth) to supplement existing enzymes in various organs like the liver, heart, and muscle. Use your knowledge of the digestion process to explain why these preparations are unlikely to be effective as advertised.
What will be an ideal response?
According to Chargaff's rule, if the DNA of a species contains 20% adenine, what percent of guanine will it contain?
A. 20% B. 30% C. 50% D. 75%
The photoreceptor protein rhodopsin
A) is found in cone cells and is sensitive to weak light at many wavelengths. B) is found in rod cells and is sensitive to weak light at many wavelengths. C) is found in cone cells and is responsible for blue color vision. D) is found in rod cells and is responsible for red color vision. E) is missing in individuals who exhibit red-green color blindness.
Predators can drive their prey to extinction unless the prey has
A. the ability to turn the tables on the predator and become predators themselves. B. the opportunity to stop the competition between them for resources. C. better genes than the predator. D. refuges in which to hide.