One distinctive feature of the coryneform
bacteria is
a. the presence of mycolic acids in the cell wall.
b. snapping division, which can give rise to V-shaped cells.
c. the presence of resting bodies called conidia.
d. resistance to high levels of radiation.
Answer: B
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The major inhibitory neurotransmitter of the human brain is _____
A) acetylcholine B) epinephrine C) glutamate D) nitric oxide E) gamma-aminobutyric acid (GABA)
Which of the following types of mutation may play an important role in driving evolution because they are often nonlethal and, therefore, remain in the gene pool?
A. Missense B. Frameshift C. Nonsense D. Deletion
A basic difference between self-pollination and cross-pollination is:
A. the method of pollen delivery B. whether insects are involved in pollination C. where the pollen came from D. whether the pollen germinated E. how often pollination occurs
What is the job of tRNA during translation?
A. It carries amino acids to the mRNA. B. It triggers the formation of a covalent bond between amino acids. C. It binds to the small ribosomal subunit. D. It triggers the termination of the protein.