Chapter 15 Practice Quiz

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Chapter 15 Practice Quiz  Due Nov 2 at 11:59pm  Points 10  Questions 10  Available until Nov 5 at 11:59pm  Time Limit 30 Minutes  Allowed Attempts 2 Take the Quiz Again Attempt History Attempt Time Score LATEST Attempt 1 11 minutes 10 out of 10 Correct answers are hidden.

Score for this attempt: 10 out of 10 Submitted Nov 2 at 1:59pm This attempt took 11 minutes. Question 1 1 / 1 pts Metabolic reactions and processes that break down material and transform fuels into cellular energy are referred to as _____ and those performing energy requiring biosynthetic processes as _____. intermediary metabolism; metabolism anabolic; catabolic catabolic; anabolic metabolism; intermediary metabolism Question 2 1 / 1 pts In a metabolic pathway, it is ΔGo, not ΔG, which determines whether a reaction can occur. a reaction with a positive ΔG cannot occur. a reaction with a positive ΔG can occur if coupled to a reaction with a greater negative ΔG. a reaction with a positive ΔG can occur if there is an increase in the concentration of the reaction's products.

Question 3 1 / 1 pts Which of the following does NOT contribute to the high phosphoryl-transfer potential of ATP? charge repulsion the ability of water to interact more favorably with the products of ATP hydrolysis than with ATP itself the adenine ring structure a resonance stabilization Question 4 1 / 1 pts The hydrolysis of ATP drives metabolism by providing energy in the form of heat. altering the conformation of metabolic reactants. shifting the equilibrium of the reaction. providing a part of the activation energy for a key reaction. Question 5 1 / 1 pts What material in vertebrate muscle serves as a reservoir for high-energy phosphate groups?

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glucose-6-phosphate phosphoenolpyruvate creatine phosphate a muscle glycogen Question 6 1 / 1 pts During catabolic processes, the oxidation of energy-rich molecules often results in the reduction of NAD+ to NADH. What comparable molecule is the most commonly used reductant for reductive steps in anabolic processes? ATP FMNH2 NADPH coenzyme A FAD Question 7 1 / 1 pts

Acyl groups generated during metabolic processes involving carbohydrates and fatty acids are activated by attachment to pyruvate. coenzyme A. glyceraldehyde-3-phosphate. biotin. Question 8 1 / 1 pts The energy for the phosphorylation of ADP to ATP can come from molecules with a higher phosphoryl transfer potential or from heat. ion gradients across membranes. energy released due to the interaction between molecules. the energy derived directly from electron carriers giving up electrons. Question 9 1 / 1 pts Controlling the catalytic activity of enzymes is important in regulation of metabolic pathways. Two ways in which this may be accomplished are

allosteric regulation and heat denaturation of enzymes. allosteric regulation and reversible covalent modification. allosteric regulation and decreasing the intracellular enzyme concentration through secretory processes. allosteric regulation and irreversible covalent modification. Question 10 1 / 1 pts Which of the following describes an important difference between NADH and NADPH? NADPH is exclusive to a small number of cells. NADH is produced in glycolysis while NADPH is used in a wide variety of pathways. NADH is more likely to give up electrons than NADPH. NADH is primarily produced in catabolic reactions while NADPH is primarily used in anabolic reactions. Quiz Score: 10 out of 10 Previous Next https://quizlet.com/131895141/chapter-15-metabolism-basic-concepts-and-design-flash-cards/

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