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ch 8 til ch 13 self quiz

ch 8 til ch 13 self quiz - MIDTERM#2 SELF QUIZZES Chapter 8...

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MIDTERM #2 SELF QUIZZES! Chapter 8 : An Introduction to Metabolism 1. Most cells cannot harness heat to perform work because a. Heat is not a form of energy b. Cells do not have much heat; they are relatively cool c. Temperature is usually uniform throughout a cell d. Heat can never be used to do work e. Heat denatures enzymes 2. Which of the following metabolic processes can occur without a net influx of energy form some other process? a. ADP + Pi ATP + water b. C6H12O6 + 6O2 6CO2 + 6H2O c. 6CO2 + 6H2O C6H12O6 + 6O2 d. Amino acids protein e. Glucose + fructose sucrose 3. If an enzyme in solution is saturated with substrate, the most effective way to obtain a faster yield of products is to a. Add more of the enzyme b. Heat the solution to 90C c. Add more substrate d. Add an allosteric inhibitor e. Add a noncompetitive inhibitor 4. If an enzyme is added to a solution where its substrate and product are in equilibrium, what would occur? a. Additional product would be formed b. Additional substrate would be formed c. The reaction would change from endergonic to exergonic d. The free energy of the system would change e. Nothing; the reaction would stay at equilibrium 5. Some bacteria are metabolically active in hot springs because a. They are able to maintain a cooler internal temperature b. High temperatures make catalysis unnecessary c. Their enzymes have high optimal temperatures d. Their enzymes are completely insensitive to temperature e. They use molecules other than proteins or RNAs as their main catalysts Chapter 9 : Cellular Respiration 1. What is the reducing agent in the following reaction? Pyruvate + NADH + H+ Lactate + NAD+ a. Oxygen b. NADH c. NAD+ d. Lactate e. Pyruvate 2. The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phophorylation is a. The oxidation of glucose and other organic compounds b. The flow of electrons down the electron transport chain
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c. The affinity of oxygen for electrons d. The H+ concentration gradient across the inner mitochondrial membrane e. The transfer of phosphate to ADP 3. Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule? a.
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ch 8 til ch 13 self quiz - MIDTERM#2 SELF QUIZZES Chapter 8...

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