The indicator used to determine whether anaerobic conditions are achieved in an anaerobic jar is:
a. phenol red.
b. bromothymol blue.
c. methylene blue.
d. methyl red.
C
Methylene blue is used as an indicator to determine whether anaerobic conditions have been met. The strip is blue in the presence of oxygen and turns white once anaerobic conditions are achieved.
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The apparatus in the accompanying figure was used in the primitive Earth atmosphere simulation experiments
performed by a. Stanley Miller. b. Günter Wächtershäuser. c. Australian researchers. d. Kwang Jeon. e. Francis Crick.
The most selectively toxic drugs are those that
A. target microbial sites that are not present in humans, e.g., the bacterial cell wall. B. cause damage to host tissues. C. cause allergic reactions in humans. D. target structures present in both microbes and humans, thus causing host tissue damage.
How many different termination codons are used in translation?
A. Three B. Two C. One D. Four
What is the term for the process that produces RNA from a DNA template?