Which of the following results from the release of the neurotransmitter dopamine into the nerve synapse?
a) the presynaptic neuron fires an action potential
b) Dopamine binds to receptor proteins on the membrane of the postsynaptic cell
c)Dopamine enters the cytoplasm of the postsynaptic cell
d) dopamine cause the postsynaptic nerve cell to contract
Answer; b) Dopamine binds to receptor proteins on the membrane of the postsynaptic cell
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What is the equation that would be used to determine the distance between two genes with a cotransduction frequency of 0.68?
A. 0.68=(1 - d/2)3 B. d=.683 - 1 C. d=(1-.68)2
What is the organelle shown in this diagram?
a. mitochondrion
b. ribosome
c. chloroplast
d. Golgi apparatus
Which characteristic is unlikely to be associated with the profundal zone?
a. the deeper part of the lake b. the area where light does not penetrate c. contains consumers d. contains primary producers e. contains cooler water than the other zones
A class of mutations that results in multiple contiguous (side-by-side) amino acid changes in proteins is probably caused by which one of the following types of mutations?
A) base analog B) transversion C) recombinant D) frameshift E) transition