Pneumocystis (carinii) jiroveci

A. causes serious infection in the elderly, premature infants, and AIDS patients.
B. is an obligate parasite.
C. is a bacterium.
D. lacks ergosterol in its plasma membrane.


Answer: A

Biology & Microbiology

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Fill in the blank with the appropriate word.

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What percent of our DNA actually codes for

protein products?

a. 3 b. 26 c. 48 d. 71 e. 100

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Four of the five choices listed below are

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Recovery from a mass extinction requires about how

long? a. 100,000 years b. none of these because recovery is never possible c. about as long as the extinction required d. less than one million years e. at least 10 million years

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