Which of the following structures is not part of an operon?
A. structural gene
B. operator
C. regulator gene
D. promoter
E. All of these are part of an operon.
Answer: E
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Inhibitory neurotransmitters cause hyperpolarization of the postsynaptic cell.
a. true b. false
Some flowers are pollinated by bats
Indicate whether the statement is true or false
ADH increases fluid retention when the body sweats and decreases fluid retention when someone has consumed large amounts of water. This is an example of
A) positive feedback. B) negative feedback. C) neurotransmitter activity. D) paracrine communication. E) synaptic communication.
Symptoms of Toxic Shock Syndrome include all the following, except:
A. fever and muscle pain. B. appearance of flesh being "eaten" down to the muscle. C. nausea, vomiting, diarrhea. D. sunburn-like rash. E. kidney and liver failure.