Which of the following is NOT one of the primary purposes of viral cultivation?

A) to isolate and identify viruses in clinical specimens
B) to prepare viruses for vaccines
C) to do detailed research on viral structure, multiplication cycles, genetics, and effects on host cells
D) to classify viruses for taxonomic reasons


Ans: D) to classify viruses for taxonomic reasons

Biology & Microbiology

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Adding helical turns to a closed-circular DNA:

A. will decrease the linking number. B. causes the formation of left-handed supercoils. C. causes the formation of negative supercoils. D. causes the formation of right-handed supercoils. E. does not affect the linking number.

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According to your text, the chemical that saves feedback information to the brain about the body's response to stress is _______.

A. serotonin B. cortisol C. dopamine D. adrenaline

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Which of the following is most likely a regulatory molecule? 

A. hair B. muscle protein C. steroid D. calcium

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The current estimates of the ENCODE project for percent functionality of the human genome based on the ENCODE definition of functionality is ________ the estimate of functionality based on the selected-effect functionality definition.

A. less than B. greater than C. equal to

Biology & Microbiology