Mycoplasmas are pleomorphic because they
A) have no cell walls.
B) are low G + C content Gram-positive bacteria.
C) exhibit snapping division.
D) have sterols in their cytoplasmic membranes.
E) produce endospores.
A
Bloom's Taxonomy: Comprehension
Section: Survey of Bacteria
Learning Outcome: 11.13
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Prokaryotes reproducing by binary fission can increase genetic variation by (select all correct choices):
A. mutation. B. DNA transfer during conjugation. C. obtaining DNA from the environment. D. obtaining DNA through viral infection. E. exchange of genetic material between homologous chromosomes.
The person who presented a similar theory of evolution to that of Darwin was:
a. Charles Lyle. b. Alfred Wallace. c. Thomas Malthus. d. Alfred Wegener. e. Robert Ballard.
Interpretation of smell is accomplished
a. by the nasal epithelium. b. in the olfactory receptors. c. by centers in the brainstem. d. by the cerebral cortex. e. independently of olfactory receptors.
Why are endospores used to measure the effectiveness of autoclave sterilization?
A. Endospores are easy to store in the lab until needed. B. Endospores are very simple structures and easy to detect. C. Endospores are very hard to kill. D. Endospores are composed of all the molecules found in living cells. E. Endospores of different bacteria are destroyed at different temperatures and can be used to calibrate autoclave temperatures.