Only polymorphisms that add or remove restriction sites can be useful in DNA typing

A. true
B. false


B

Biology & Microbiology

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Which of the following is TRUE of the mediator protein complex in eukaryotes?

A. Mediator facilitates interactions between RNA polymerase II and regulatory transcription factors. B. Mediator controls the rate at which RNA polymerase transcribes mRNA. C. Mediator partially wraps around RNA polymerase and the general transcription factors. D. Mediator is composed of several proteins. E. All of the choices are correct.

Biology & Microbiology

Which of the following gives the correct rank order for relative toxicity (most to least) of the primary nitrogenous wastes used by different animals?

A. ammonia ? urea ? uric acid B. uric acid ? ammonia ? urea C. urea ? uric acid ? ammonia D. ammonia ? uric acid ? urea E. urea ? ammonia ? uric acid

Biology & Microbiology

The convergence in external morphology of sharks, penguins, and porpoises is attributed to

a. reduced genetic variability in these groups. b. selection pressures that are common to these groups. c. reproductive isolation of these groups. d. identical genes in all three groups. e. use and disuse of the limbs.

Biology & Microbiology

On Figure 37-1, the structure in which the formation of eggs would occur is labeled __________


a. 1
b. 5
c. 6
d. 9
e. 10

Biology & Microbiology