Which extraembryonic tissue burrows into, and thus attaches to, maternal tissues?
a. the amnion
b. the yolk sac
c. the chorion
d. the blastocyst protein coat
e. the inner cell mass
ANSWER: c
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In a branched pathway with many end products, an abundance of one of the end products will usually inhibit
A. the first committed step in the branch of the pathway leading to the production of that particular product. B. the last step before the branch leading to the production of that particular end product. C. the last step in the production of that particular product. D. the first step in the set of pathways.
__________ is a process where energy (as electrons) is released, whereas __________ is a process
where energy (as electrons) is accepted. a. Reduction; oxidation b. Enthalpy; entropy c. Entropy; enthalpy d. Oxidation; reduction e. Anabolism; catabolism
Why is it important for cells to be able to communicate with one another? List the main steps involved in cell
signaling. What will be an ideal response?
In the reaction catalyzed by aconitase, the conversion of citrate to isocitrate is inhibited by fluoroacetate. Fluoroacetate is used as a pesticide. Why is this an effective pesticide?
A. It inhibits the Krebs cycle. B. It inhibits pyruvate oxidation. C. It inhibits glycolysis. D. It inhibits ATP synthase. E. It inhibits the electron transport chain.