The constituents of the electron transport chain have similar capabilities, with the exception of ubiquinone (coenzyme Q). What is different about ubiquinone?
A) Ubiquinone is a protein that begins the electron transport chain, so it accepts the highest-energy electrons.
B) Ubiquinone is a protein that serves as a regulator of the rate of redox reactions in the electron transport chain.
C) Ubiquinone is a protein that is a constituent of all cells, prokaryotic or eukaryotic; hence its name, originating from "ubiquitous."
D) Ubiquinone is not a protein, is lipid soluble, and can move through the inner mitochondrial membrane.
Answer: D
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Monoploids are useful in plant breeding because
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In the electron transport chain, exergonic redox processes drive the endergonic reaction in which:a
ADP is produced by dephosphorylation of ATP. b. glucose is produced from phosphorylation of ADP. c. G3P is produced from phosphorylation of ADP. d. ATP is produced by phosphorylation of ADP. e. pyruvate is converted to acetyl CoA.
For the inducible lac operon to be turned on, the
a. lactase (enzyme) must not be in excess. b. substrate (lactose) must be absent. c. substrate must be present and bind the repressor protein. d. RNA polymerase must be blocked from transcribing the genes.