Which proteins in the plasma membrane identify a cell as part of the same individual or as foreign?
a. transport proteins
b. recognition proteins
c. receptor proteins
d. cell adhesion proteins
e. nuclear proteins
ANSWER: b
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Which of the following disorders does not involve faulty DNA repair?
A) Xeroderma pigmentosum B) Trichothiodystrophy C) Ataxia telangiectasis D) Becker muscular dystrophy
Blood glucose levels are regulated by
a. insulin. b. glucagon. c. cortisol. d. insulin and glucagon only. e. insulin, glucagon, and cortisol.
How are adjacent nucleotides on a strand of DNA connected to each other?
a. by a hydrophobic interaction b. by a phosphodiester bond c. by a peptide bond d. by a hydrogen bond
Which of the following compounds produces carbon dioxide during the breakdown of glucose in aerobic respiration?
a. phosphoglycerate b. pyruvate c. ATP d. NADH e. fructose bisphosphate