What is the oxidized form of the most common electron carrier that is needed for both glycolysis and the Krebs cycle?
A. ATP
B. FAD
C. pyruvate
D. NAD+
E. acetyl-CoA
D. NAD+
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Chemical signals that are released by one cell and act locally on neighboring cells are referred to as:
A. paracrine signals. B. autocrine signals. C. hormones. D. pheromones. E. neurotransmitters.
In the figure above, the amount of energy symbolized by the line "A" would be the ____
a. reactant energy b. product energy c. cofactor energy d. activation energy e. intermediate energy
Short segments of newly synthesized DNA are joined into a continuous strand by _____.
Fill in the blank(s) with the appropriate word(s).
Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills," to another group. The group receiving the placebo ________
A) is the control group B) constitutes the experimental group C) is needed so that the test will be repeated enough times D) is a backup in case some of the people getting the drug drop out of the test