In Figure 8.5, which model of the lac operon correctly shows RNA polymerase, lactose, and repressor protein when the structural genes are being transcribed?

A) a
B) b
C) c
D) d
E) e


Answer: D) d

Biology & Microbiology

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humans b. pigs c. birds d. humans and pigs e. humans, pigs and birds

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Indicate whether the statement is true or false

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In 1997, Dolly the sheep was cloned. Which of the following processes was used?

A) replication and dedifferentiation of adult stem cells from sheep bone marrow B) separation of an early stage sheep blastula into separate cells, one of which was incubated in a surrogate ewe C) fusion of an adult cell's nucleus with an enucleated sheep egg, followed by incubation in a surrogate D) isolation of stem cells from a lamb embryo and production of a zygote equivalent

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All of the following are granulocytes except ________.

A. lymphocytes B. neutrophils C. basophils D. eosinophils E. All of the choices are granulocytes.

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