In a synapse, a neurotransmitter is released _____
A) in response to an action potential depolarizing the presynaptic membrane
B) when threshold potential is reached
C) when enough voltage-gated sodium channels open to release calcium into the synapse
D) through gap junctions joining the synaptic membranes
Answer: A
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The thermostable enzyme most commonly used in PCR is reverse transcriptase.
Answer the following statement true (T) or false (F)
The atomic number of an atom is determined by the number of
A. protons and neutrons. B. neutrons. C. electrons. D. protons and electrons. E. protons.
During photosynthesis, _____________ is reduced to _____________
A. water; carbon dioxide B. carbon dioxide; glucose C. oxygen; water D. glucose; oxygen E. carbon dioxide; oxygen
Which of the following statements is not true of the TCA cycle?
A) Oxidation occurs at three steps in the TCA cycle. B) Decarboxylation occurs at two steps in the TCA cycle. C) ATP/GTP is generated at one point by substrate-level phosphorylation. D) Acetate enters the TCA cycle and joins a four-carbon acceptor molecule to form citrate. E) FAD is an electron acceptor in the cycle.