23) 23) Which of the following is true for all exergonic reactions? 5) A net inp

Question

23) 23) Which of the following is true for all exergonic reactions? 5) A net input of energy from the surroundings is required for the reactions to proceed. C) The products have more total energy than the reactants. D) The reactions are rapid. )The reaction proceeds with a net release of free energy E) The reaction goes only in a forward direction: all reactants will be converted to products, but no products will be converted to reactants. 24) 24) Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's A) entropy tree-energy content. C) endothermic level. D) equilibrium point. E) activation energy. 25) 25) Which of the following statements describes enzyme cooperativity? A) A product of a pathway serves as a competitive inhibitor of an early enzyme in the pathway. B) A substrate molecule bound to an active site of one subunit promotes substrate binding to the active site of other subunits. C) Several substrate molecules can be catalyzed by the same enzyme. D) A multienzyme complex contains all the enzymes of a metabolic pathway. E) A substrate binds to an active site and inhibits cooperation between enzymes in a pathway.

Explanation / Answer

23. a) the reaction proceeds with the net release of free energy.

24. e) activation energy.

25. b) a substrate molecule bound to an active site of one subunit promotes substrate binding to the active site of other subunits.

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