Each of the following statements is true about the nicotinic acetylcholine receptor except
A) the actions of acetylcholine can be mimicked by nicotine.
B) it binds one molecule of acetylcholine for activity.
C) the open channel allows an influx of sodium ions.
D) biochemical purification was aided by the use of cobratoxin.
E) it is made up of five large subunits.
Answer: B
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________ refers to the removal of an amino group from an amino acid. One mechanism for this removal is ________, in which the amino group is transferred to an acceptor molecule.
A. Deamination; transamination B. Deamination; hydrolysis C. Transamination; deamination D. Hydrolysis; transamination
Which of the following represents the correct sequence of cell types through which an electrical signal would pass in a reflex arc?
A. sensory neuron ? interneuron in the CNS ? motor neuron B. motor neuron ? interneuron in the PNS ? sensory neuron C. sensory neuron ? motor neuron ? interneuron in the CNS D. motor neuron ? sensory neuron ? interneuron in the PNS E. sensory neuron ? motor neuron ? interneuron in the CNS
E. coli would appear what color on HE agar?
a. Green b. Green with a black center c. Yellow d. Yellow with a black center
Darwin studied the glyptodont and was intrigued by its similarities to the ________
a. horse b. cacti he discovered on the Galapagos Islands c. armadillo d. finches he discovered on the Galapagos Islands