The addition of methyl groups to DNA by chemicals in tobacco can cause DNA to _____

a. replicate
b. polymerize
c. hybridize
d. mutate
e. fragment


ANSWER: d

Biology & Microbiology

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An experiment was done to determine the decimal reduction time of a specific population of organisms at 80oC. The data is indicated by an arrow on the graph. Which labeled line represents the likely results if the experiment was repeated using a lower temperature?

A. Line C B. Line A C. Line B D. Line D

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Describe the symbiotic relationships of tube-dwelling and burrowing worms

What will be an ideal response?

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Which of the following have unique antigens that can

stimulate an immune response? a. viruses b. bacterial cell walls c. tumor cells d. bacterial DNA e. all of these

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Aerobic respiration and anaerobic respiration use different ________, while chemolithotrophs and chemoorganotrophs use different ________

a. proton motive force / photophosphorylation b. electron acceptors / electron donors c. types of phosphorylation / carbon sources d. electron donors / electron acceptors

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