Quaternary ammonium compounds are disinfectants effective against

A) endospores.
B) mycobacteria.
C) nonenveloped viruses.
D) Pseudomonas aeruginosa.
E) enveloped viruses.


E
Bloom's Taxonomy: Comprehension
Section: Chemical Methods of Microbial Control
Learning Outcome: 9.24

Biology & Microbiology

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Diffusion of nonpolar molecules would not be affected by:

a. molecule size b. steepness of the concentration gradient c. temperature d. charge e. steepness of the pressure gradient

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The oral and inactivated polio vaccines are made from plant cell cultures.

Answer the following statement true (T) or false (F)

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If tyrosine and isoleucine undergo condensation, the new bond that is formed is between the:a

oxygen of the R group and the hydrogen of the amino group. b. carbon of the R group and the nitrogen of the amino group. c. carbon of the carboxyl group and the hydrogen of the R group. d. carbon of the carboxyl group and the hydrogen of the amino group. e. carbon of the carboxyl group and the nitrogen of the amino group.

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Plants have special groups of self-renewing cells called

A. root cells. B. meristems. C. cast cells. D. chloroplasts.

Biology & Microbiology