Ribosomes are the structures in the cell that produce
A. lipids.
B. glucose.
C. proteins.
D. steroids.
E. starches.
Answer: C
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Which organism has a challenge to maintain cellular electrolyte and fluid balance in its environment?
A. A bacterium in Great Salt Lake B. A bacterium in a fresh-water lake C. A protozoan in a fresh water lake D. All of the above have problems in maintaining electrolyte and fluid balance within the cell.
Which of the following would NOT be included in the reaction chamber of an experiment intended to
duplicate the atmosphere of ancient earth? a. carbon dioxide b. hydrogen gas c. carbon monoxide d. water vapor e. nitrogen gas
In a disease associated with a nucleotide repeat, anticipation is often noticed in subsequent generations, usually associated with a more severe phenotype. Which of the following is a more likely cause of anticipation?
A) The CAG alleles with a high number of repeats are unstable and change size from generation to generation. B) Subtle phenotypic nuances are more often sought by a physician. C) Family members are exposed to the same mutagens. D) Highly repeated sequences are expressed more often. E) The sequences have greater stability in later generations.
After a major crude oil spill, a variety of specific microbes is distributed in the area of the spill. This would be an example of
A. microbial antagonism. B. microbial adaptation. C. bioremediation. D. bioreactors. E. biogeochemical cycling.