Listeria monocytogenes is
A) acid-tolerant.
B) cold-tolerant.
C) salt-tolerant.
D) acid-, cold-, and salt-tolerant.
Answer: D
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DNA polymerase and aminoacyl-tRNA synthase are similar in that both have proofreading ability, but differ in the substrates that they act upon.
Answer the following statement true (T) or false (F)
Mesophelic crenarchaeotes (Thaumarchaeota) have been isolated ________.
A. from marine plankton B. as symbiotes of sea sponges and sea cucumbers C. as pathogens of whales and giant squid D. from rice paddies and lake sediment
Chemical mutagens often act by altering the
A. alkyl groups of the nucleobase. B. nucleobase sequence. C. number of binding sites on the nucleobase. D. hydrogen bonding properties of the nucleobase.
What is the process in which impulses jump from node to node?
A. facilitated transmission B. refractory action C. incomplete transfer D. repolarization E. saltatory conduction