The role of the postsynaptic neuron in neural communication is to ____
a. release neurotransmitters
b. use gated calcium channels
c. contain synaptic vesicles
d. block the action of neurotransmitters
e. receive the signal from the presynaptic cell
ANSWER: e
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Which of these stages of translation is most important to the fidelity of protein synthesis?
A. formation of aminoacyl-tRNAs B. initiation of translation at an AUG codon C. translocation of the peptidyl-tRNA from the A site to the P site during elongation D. termination of translation at a STOP codon
Which of the following does not contribute to limits on population growth?
a. snakes feeding on mice in a cornfield b. bears having two cubs c. the amount of light for photosynthesis d. a disease-causing organism entering a population e. an increase in the total rainfall in a normally dry environment
Considering the structure of double-stranded DNA, which kind(s) of bonds hold one complementary strand to the other?
A) hydrogen B) ionic C) hydrophobic and hydrophilic D) covalent E) van der Waals
The following molecule is best described as a(n) ________. CH3–CH2–CH2–CH2
A) protein B) carbohydrate C) organic compound D) inorganic compound