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1. substrate enters active site forming enzyme-substrate complex2. enzyme changes shape slightly, resulting in even closer fit (induced fit model)3. change in enzyme shape stresses chemical bonds, permitting new bonds to be formed4. products are released; enzyme may repeat process

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The formation of glucose-6-phosphate from glucose is an endergonic reaction and is coupled to which of the following reactions or pathways?-The conversion of glucose + fructose to make sucrose-The active transport of a phosphate ion into the cell-The formation of ATP from ADP + Pi-The hydrolysis of ATP-The contraction of a muscle cell

Which of the following is a correct description of the events of cellular respiration in proper sequence?-Glycolysis; oxidative phosphorylation; citric acid cycle; oxidation of pyruvate-Oxidation of pyruvate; citric acid cycle; oxidation of glucose to pyruvate; oxidative phosphorylation-Oxidation of glucose to pyruvate; oxidation of pyruvate; citric acid cycle; oxidative phosphorylation-Oxidation of glucose to pyruvate; reduction of pyruvate; citric acid cycle; oxidative phosphorylation-Glycolysis; reduction of pyruvate; citric acid cycle; oxidative phosphorylation

In preparing pyruvate to enter the citric acid cycle, which of the following steps occurs?-Pyruvate is reduced to acetyl-coA, which involves the reduction of pyruvate, the addition of a carbon dioxide from the environment, and its reduction by NADH.-Pyruvate is ionized directly to acetyl-coA.-Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to reduce NAD+ to NADH.-Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are donated to NADH to produce NAD+.-Pyruvate is reduced, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to oxidize NAD+ to NADH.

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