The E site of a ribosome is where
A. new amino acids enter the ribosome.
B. the polypeptide elongates.
C. the tRNA exits the ribosome.
C
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Which of the mutations above would result in the replacement of an amino acid with a nonpolar side chain with a different, but similar, amino acid?
A. mutation I B. mutation II C. mutation III D. None of the above.
Researchers are trying to determine the cause of circadian rhythm disruption in modern societies. They measured the hormone ________________ , which is associated with sleep-wake cycles in humans
Levels of this hormone are high at night and lower during the day. Fill in the blank with the correct word.
Organic compounds must contain:
a. oxygen b. carbon-oxygen bonds c. carbon-hydrogen bonds d. none of the above
Which tissue layer provide for primary digestive motility?
a. mucosa. b. submucosa. c. muscularis mucosa. d. muscularis externa. e. mesentery.