Quaternary ammonium compounds ("quats") are used for

A) antisepsis.
B) disinfection.
C) sterilization.
D) quantifying antimicrobial activity.
E) both antisepsis and disinfection.


B

Biology & Microbiology

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What would happen developmentally if a zygote with XY sex chromosome karyotype had a defective testosterone receptor?

What will be an ideal response?

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A marine fish with a cold body temperature that matches its cold surroundings is an example of

A. regulating. B. conforming. C. conditioning. D. negative feedback.

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In your research, you have discovered that Protein X is often ubiquitinated in people with a certain disease. What would you predict about levels of Protein X in these patients?

A. Levels of Protein X will be the same, just carrying a ubiquitin tag. B. Levels of Protein X will be decreased due to negative feedback on transcription. C. Levels of Protein X will be increased due to protection from degradation. D. Levels of Protein X will be increased due to transcriptional activation. E. Levels of Protein X will be low due to degradation in the proteasome.

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An organism that grows slowly in the cold but has an optimum growth temperature of 32°C is called

A. a psychrophile. B. an extremophile. C. a thermophile. D. a facultative psychrophile. E. thermoduric.

Biology & Microbiology