Which of the following would you expect to be most prevalent in the intestines of humans?
A) Endospore-forming bacilli
B) Gram-negative, aerobic cocci
C) Facultatively anaerobic gram-negative rods
D) Aerobic, helical bacteria
E) None of the above
C) Facultatively anaerobic gram-negative rods
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Why is Taq polymerase used in a polymerase chain reaction (PCR)?
A. Taq polymerase is more efficient than other DNA polymerases. B. Unlike other DNA polymerases, Taq polymerase is heat stable and survives the 94 degree denaturation step in PCR. C. Taq polymerase can produce DNA from an RNA template, unlike other DNA polymerases. D. Unlike other DNA polymerases, Taq polymerase is not inhibited by dideoxy nucleotides. E. Taq polymerase has proofreading activity and thus makes fewer errors than other DNA polymerases.
The goal of tertiary wastewater treatment is to sharply reduce the levels of ________ from the final effluent
A) organic compounds B) heavy metals C) methane D) inorganic nutrients
In contrast to most other plant hormones,
which hormone is a germination inhibitor?
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene