A patient receiving hemodialysis began spiking a fever shortly after his treatment. Blood cultures were drawn and grew out the following gram-negative rods that were indole positive with varia-ble results for urea, nitrate reduction, and gelatin. The organism is most likely:

a. E. meningoseptica.
b. E. brevis.
c. CDC group O-1.
d. Chryseobacterium spp.


D
Chryseobacterium spp. is the only organism listed in Table 23-4 that has this biochemical profile.

Biology & Microbiology

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Which of the following best describes the effect of cancer-causing mutations on the cell cycle?

A. The mutations increase the speed of the cycle. B. The mutations cause the cell to bypass checkpoints in the cycle. C. The mutations eliminate one or more stages of the cycle. D. The mutations interfere with S stage of the cycle. E. None of these.

Biology & Microbiology

Convert 500 mg to g.

A. 50 B. 5000 C. 0.5 D. 0.05

Biology & Microbiology

The nervous system determines the pitch of a tone by

A) the region of the basilar membrane that is vibrating most vigorously. B) the peak amplitude of basilar membrane displacement. C) sites along the basilar membrane where vibrations are longest. D) the frequency of oval window vibration.

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Describe how RNA polymerase motion along the DNA affects supercoiling and explain how this is resolved

What will be an ideal response?

Biology & Microbiology