The sigma subunit of bacterial RNA polymerase ___________________

(a) contains the catalytic activity of the polymerase.
(b) remains part of the polymerase throughout transcription.
(c) recognizes promoter sites in the DNA.
(d) recognizes transcription termination sites in the DNA.


(c)

Biology & Microbiology

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Becoming bipedal requires more anatomical changes than simply being able to stand on hind legs

A. true B. false

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Norton Zinder and Joshua Lederberg discovered transduction in experiments with ____

a. Escherichia coli b. Neurospora c. Aspergillus d. Salmonella typhimurium e. Streptococcus pneumoniae

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In an average person, ____ erythrocytes are produced each second

a. 200 to 300 b. 2,000 to 3,000 c. 2 to 3 million d. 4.8 to 5.4 million e. 2 to 3 billion

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Replication of DNA occurs during ____

a. S phase b. G1 phase c. G0 phase d. prophase e. cytokinesis

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