What were the most direct ancestors of modern plants?
a. cyanobacteria
b. fungi
c. green algae
d. sponges
Ans: c. green algae
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In a neuron at rest, the membrane is most permeable to
A. potassium. B. sodium. C. chloride. D. calcium. E. magnesium.
Which of the following statements concerning G protein is FALSE?
a. Its subunits can separate. b. One subunit is a GTPase. c. One subunit binds GTP. d. One subunit binds GDP. e. One subunit binds ATP.
An isolate of a mutant bacterium appears to grow more slowly than the wild-type population from which it was isolated
Further studies showed that the slower growth was due to a markedly reduced DNA polymerase I activity. From this information, one would expect that this organism would also be deficient in the activity of DNA A) excision repair. B) recombination. C) transcription. D) translation. E) unwinding.
Which word best describes the thalamus?
A) processor B) reflexor C) regulator D) transmitter