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Unformatted text preview: A) a B) b C) c D) d E) e Two processes can be energetically coupled only if A. One hydrolyzes ATP B. Both occur in the plasma membrane C. One of the two reactions does not require enzyme catalysis D. The sum of the G for the two reactions is negative E. They both act to decrease a concentration gradient. The rate of a chemical reaction is increased by A. Increasing the activation energy needed. B. Cooling the reactants. C. Decreasing the concentration of the reactants. D. Increasing the concentration of the products. E. Adding a catalyst. Membrane activities that require energy from ATP hydrolysis include all of the following EXCEPT A. facilitated diffusion. B. active transport. C. Na + ions moving out of the cell. D. proton pumps. E. establishing a proton gradient A chemical reaction that has a positive G is necessarily A. exergonic. B. unidirectional. C. enzyme catalyzed. D. spontaneous. E. None of the above...
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