Epinephrine, norepinephrine and dopamine are all synthesized from the amino acid tryptophan.
a. true
b. false
Answer: b. false
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Which of the following is a mobile electron carrier in the electron-transport chain?
What will be an ideal response?
Which of the following is the binding site for RNA
polymerase on the DNA molecule? a. structural gene 1 b. repressor gene c. promoter sequence d. operator sequence e. region between an operator and the first structural gene
In this sample of cells, what stage of the cell cycle are most of the cells in?
A) G1 B) S C) G2 D) mitosis
How does a patient typically become infected with hookworms?
A) Cysts are spread onto fomites when an infected host does not properly wash their hands and then the patient touches that object and doesn't wash their hands before eating. B) Cysts are spread via respiratory droplets when an infected host coughs or sneezes. C) Eggs are ingested when the patient eats infected seafood. D) The worm penetrates the skin when the patient walks outside barefoot. E) Cysts are ingested when the patient eats undercooked meat.