"Hammerheads" are self-cleaving structures found in
a. mitochondria.
b. viroids.
c. retroviruses.
d. eubacteria.
e. archaea.
Ans: b
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Which of the following is not a function of the kidneys?
A. All of these answer options are functions of the kidneys. B. elimination of toxic compounds C. regulation of water levels in the body D. regulation of electrolyte levels in the body E. regulation of blood pressure
Which of the three atomic particles are charged?
a. electrons and protons b. neutrons only c. protons and neutrons d. electrons only e. protons, neutrons, and electrons
What is the result of calcium flow through NMDA receptors in a synapse where little glutamate has been released from the presynaptic terminal?
a. NMDA receptors are removed from the postsynaptic terminal. b. NMDA receptors are added to the postsynaptic terminal. c. AMPA receptors are removed from the postsynaptic terminal. d. AMPA receptors are added to the postsynaptic terminal.
If yeasts are grown under anaerobic conditions, pyruvate is converted first to __________ and then to
__________. a. citrate; oxaloacetate b. acetyl coenzyme A; citrate c. lactate; carbon dioxide d. acetaldehyde; ethyl alcohol e. acetaldehyde; lactate