How many oxidation reactions occur during the Citric acid cycle?
A. 2
B. 9
C. 6
D. 4
E. 1
Answer: D
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In prokaryotes, inducers are small molecules that:
A. bind to activators and promote transcription. B. bind to activators and inhibit transcription. C. bind to repressors and promote transcription. D. bind to repressors and inhibit transcription. E. None of these choices is correct.
What adaptation allows sea snakes to remain submerged for long periods of time? a. Able to absorb carbon dioxide through the skin
b. They breathe air. c. Dual lungs that extend almost to the tail. d. Able to lower metabolic rate.
The principal role for sugars in living organisms is to
A. create cellular energy. B. produce hormones. C. serve as a form of long-term energy storage. D. form cell membranes. E. create our genetic code.
Which neurotransmitter is a target for therapeutic treatment in Alzheimer's disease?
A) dopamine B) serotonin C) acetylcholine D) glutamate