An antiseptic (or germicide) is distinguished from other sterilizing compounds by
A) being able to inhibit growth of microorganisms but not necessarily kill all of them.
B) being able to be used on living tissues without harm.
C) its ability to protect from subsequent microbial infectionsâ€"not just initial sterilization.
D) killing all bacteria and microscopic fungi but not being effective against viruses.
Answer: B
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The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called ________.
A. ribozymes B. ribosomal RNA C. transfer RNA D. messenger RNA E. primer RNA
In a cell membrane, the fatty acid tails
a. face toward the inner and outer surfaces of the cell membrane b. face toward each other in the interior of the bilayer c. always face toward the inside of the cell d. always face toward the outside of the cell
In the classic argument of ‘nature vs. nurture’, nature would most correspond with
a. genes. b. environment. c. divine intervention. d. environment and genes. e. genes, environment, and genes.
The woody plant genus Frankia produces root nodules that harbor
a. actinobacteria b. rhizobium c. fungi d. green algae e. aktinites