A restriction enzyme is a ____

a. viral enzyme that randomly cuts DNA
b. DNA ligase enhancer
c. bacterial enzyme that cuts DNA at specific sites
d. single-stranded RNA molecule

e. bacterial enzyme that functions in DNA replication


c

Biology & Microbiology

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Which of the following may be added to normal media to make it more selective for staphylococci?

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During the Pleistocene epoch, plant communities changed dynamically in response to which mechanism?

a. a meteor impact b. iridium in the soil c. fluctuating climates d. intense grazing pressure e. competition with gymnosperms

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The hallucinogen LSD is a product of ________.

A. ascomycetes B. basidiomycetes C. yeasts D. zygomycetes

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Tubeworms around deep-sea hot vents house which symbiotic organism?

What will be an ideal response?

Biology & Microbiology