In the lactose operon, the repressor gene binds to:

A. the lacI coding region.
B. the promoter.
C. the operator.
D. the lacZ coding sequence.
E. the lacY coding sequence.


C

Biology & Microbiology

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Which of the following is true of predation?

a. A predator exerts selective pressure on its prey. b. A prey exerts selective pressure on its predator. c. In a typical predation case, the predator would not kill its prey. d. Feeding on carcasses is also an example of predation. e. Predator and prey exert selective pressure on one another.

Biology & Microbiology

All actions of the nervous system depend on the transmission of nerve impulses over which of the following?

a) neuroglia b) efferent pathways c) afferent pathways d) neurons

Biology & Microbiology

The nephridial organs of flatworms are called metanephridia. Indicate whether the statement is true or false

Biology & Microbiology

Which statement about calico cats is false?

A. Calico cats are genetic mosaics. B. Calico cats can be male or female. C. The variation in coat color is an example of an epistatic interaction. D. The different colored fur is due to the inactivation of one X chromosome.

Biology & Microbiology