Chapter 6, 7, & 31 Quiz
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They increase the activation energy required for chemical reactions to proceed.
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Which of the following statements concerning enzymes is false?
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When we break down our food, the reactions are not 100 percent efficient; therefore, energy is lost as heat.
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When we metabolize our food, we produce heat that helps to keep us warm. Which of the following best describes why?
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steam
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Which of the following has the most entropy?
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Their activity can be reduced when the product binds the enzyme.
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Which of the following is true of allosteric enzymes?
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oxygen-dependent
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The term aerobic means:
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NAD+
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During cellular respiration, what molecule collects the majority of the electrons from the food that we eat?
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ATP
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Cells capture the energy from food and store it in the form of:
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All organisms use glycolysis; not all use the Krebs cycle and the electron transport chain.
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Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?
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Soy protein has all essential amino acids in the proper proportions.
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What is unusual about soy protein as opposed to other plant protein sources?
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fibers
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Which of the following is a complex carbohydrate that cannot be digested?
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whole grain foods
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In a traditional food pyramid, which type of food would be closest to the base?
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iodine
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Which of the following is a trace mineral?
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False
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Enzymes themselves are altered in the process of catalyzing chemical transformations.
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False
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Allosteric regulation depends on inhibitors binding to the active site of enzymes.
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bioenergetics
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Links the study of energy to life
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thermodynamics
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The study of energy
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exergonic reaction
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The breakdown of large molecules into smaller ones, with the release of energy
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endergonic reaction
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The building of larger molecules, requiring energy
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coupled reaction
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Using the energy from the breakdown of molecules to fuel the construction of new molecules
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ATP
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A source of chemical energy for metabolic processes
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activation energy
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The energy required to initiate a chemical reaction
