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
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The influenza virus can infect:a
humans b. pigs c. birds d. humans and pigs e. humans, pigs and birds
All of the following are granulocytes except ________.
A. lymphocytes B. neutrophils C. basophils D. eosinophils E. All of the choices are granulocytes.
Differences among species may relate to adaptation for the ability to exploit a certain environment or range of resources independent of competition
Indicate whether the statement is true or false
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