Study%20Questions-Chapter-8-1

Study%20Questions-Chapter-8-1 - BIOL. 1305 Spring 2011...

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BIOL. 1305 – Spring 2011 (CRN# 22530) Study Questions Chapter 8: Energy, Enzymes, and Metabolism 1. Water held back by a dam represents what kind of energy? a. Hydroelectric b.Irrigation c.Potential d. Kinetic e. all of the above 2. The sum total of all the chemical reactions in a living structure is called its a. energetics. b.activity. c. digestive power. d. entropy. e. metabolism. 3. The first law of thermodynamics states that the total energy in the universe is a. decreasing. b.increasing. c. constant. d. being converted to free energy. e. being converted to matter. 4. In any system, the total energy includes usable and unusable energy. The unusable energy is a measure of the disorder of the system and is referred to as a. free energy. b. entropy. c. enthalpy. d. thermodynamics e. equilibrium. 5. Which of the following statements about enzymes is false? a. An enzyme changes shape when it binds to a substrate. b. Enzymes lower the activation energy. c. Enzymes are highly specific. d. An enzyme may orient substrates, induce strain, or temporarily add chemical groups. e. Most enzymes are much smaller than their substrates. 6. In a chemical reaction, transition-state species have free energies that are a. lower than either the reactants or the products. b. higher than either the reactants or the products. c. lower than the reactants, but higher than the products. d. higher than the reactants, but lower than the products. e. lower than the reactants, but the same as the products. 7. The hydrolysis of sucrose to glucose and fructose is exergonic. However, if sucrose is dissolved in water and the solution is kept overnight at room temperature, there is no detectable conversion to glucose and fructose. Why? a. The change in free energy of the reaction is positive.
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Study%20Questions-Chapter-8-1 - BIOL. 1305 Spring 2011...

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