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
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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
The oral and inactivated polio vaccines are made from plant cell cultures.
Answer the following statement true (T) or false (F)
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.
Plants have special groups of self-renewing cells called
A. root cells. B. meristems. C. cast cells. D. chloroplasts.