To which amino acid is nitric oxide added, altering the activity, turnover and/or interactions of proteins like hemoglobin, Ras, ryanodine channels and caspases?
a) methionine
b) cysteine
c) asparagine
d) phenylalanine
e) alanine
Ans: b) cysteine
Biology & Microbiology
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Osmosis in capillary exchange takes place in
response to
a. high oxygen concentrations. b. low oxygen concentrations. c. high plasma protein concentrations. d. low plasma protein concentrations. e. high carbon dioxide concentrations.
Biology & Microbiology
Amino acids in a polypeptide are part of
a. the primary structure. b. carbohydrates. c. lipids. d. nucleic acids. e. most macromolecules.
Biology & Microbiology
Into what units are the myofibrils of skeletal muscle organized?
A) A discs B) sarcomeres C) Z discs D) antagonistic pairs
Biology & Microbiology
Molecules of food have a special form of potential energy called ________.
A. kinetic energy B. chemical energy C. entropy D. ATP
Biology & Microbiology