True pili used for conjugation are only found on gram-negative bacteria.

a. true
b. false


Answer: a. true

Biology & Microbiology

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Many proto-oncogenes regulate ________

A) cell growth B) cell cloning C) cell division D) cell repair

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The main criteria presently used for grouping viruses does NOT include

A) structure. B) chemical composition. C) similarities in genetic makeup. D) host infected.

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About 1 male in 1,000 is born with two Y chromosomes and one X chromosome, a condition known as ________ syndrome

Fill in the blank(s) with correct word

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Nitrification ____.

A. converts ammonium into nitrates B. reduces nitrates to nitrites C. converts nitrogenous compounds into free nitrogen D. converts atmospheric nitrogen to ammonia E. reduces ammonia to ammonium

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