A bacterial ________ is the nontranscribed region of the DNA to which RNA polymerase binds in order to initiate transcription.

A. promoter
B. initiator
C. operon
D. operator


Answer: A

Biology & Microbiology

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The negatively charged component of the atom is the

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How can radioisotopes be used as tracers to study biological processes?

What will be an ideal response?

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Digestion of protein begins in the 

A. mouth. B. stomach. C. duodenum. D. small intestine.

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Which of the following statements about pH is true?

A) The pH scale is a measure of oxygen ion concentration. B) A single unit change on the pH scale is equivalent to a 1% change in hydrogen ion concentration. C) An increase in hydrogen ion concentration means a decrease in pH scale units. D) Basic pH levels are less than 7.

Biology & Microbiology