Which of the following happens first in the PCR process?
a. repeated cycles of high and low temperatures
b. mixing of DNA polymerase with template DNA, nucleotides, and primers
c. DNA hybridization
d. DNA synthesis
e. DNA unwinds
ANSWER: b
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A new drug is developed thatinhibits formation of the flagellar filament by impairing production of the protein flagellin. Is this going to be a good drug?
A. Potentially-it would definitely only impair bacteria, but wouldn't matter for the ones that don't use a flagellum to move around. B. Potentially-if it could be shown that it also didn't impair the production of the eukaryotic flagellum. C. No-our eukaryotic cells depend on flagella to move around in our body, and this would impair that function. D. No-bacterial flagella are produced using microtubules, not the protein flagellin. This drug would be useless in eliminating bacteria.
A species that has population levels so low it faces extinction in all or part of its range is designated as ____
a. riparian b. endemic c. endangered d. threatened e. an indicator
The krebs cycle occurs in the mitochondrion
a. true b. false
What would be the hypothetical outcome if the action of RecA was inhibited during the SOS response?
A. LexA would autolyse, and therefore the transcription of DNA repair genes would occur. B. LexA would not autolyse, and therefore the transcription of repair genes would occur. C. LexA would autolyse, and therefore the transcription of repair genes would not occur. D. LexA would not autolyse, and therefore the transcription of DNA repair genes would not occur.