Besides biochemical tests, which techniques are also useful for identifying a bacterial specimen?
A) observation of general culture characteristics
B) microscopy and observation of general culture characteristics
C) microscopy and molecular genetics techniques and observation of general culture characteristics
D) microscopy
E) molecular genetics techniques
Answer: C
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A stool specimen is examined, and the following characteristics are observed: • 15 to 18 lateral branches on each side • Scolex with four suckers • No hooklets The intermediate hosts of this tapeworm are:
a. cattle. b. humans. c. cats. d. swine.
The presence of thylakoids, phycocyanin, gas inclusions, and cysts would be associated with
A. spirochetes. B. archaea. C. cyanobacteria. D. purple sulfur bacteria. E. green sulfur bacteria.
Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are
A) homologous chromosomes. B) sister chromatids. C) complementary chromosomes.
Which of the following does NOT represent a change in membrane potential?
a. EPSP b. threshold potential c. depolarization d. repolarization e. IPSP