In which of the following reactions is the reactant oxidized? a. ATP → AMP b. NAD+ → NADH c. NADH → NAD+ d. acetaldehyde → ethanol
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In which of the following reactions is the reactant oxidized?
a. ATP → AMP
b. NAD+ → NADH
c. NADH → NAD+
d. acetaldehyde → ethanol
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- Substance A is converted to substance B in a metabolic reaction. Which statement best describes the role of enzyme during this reaction? A. It dissolves substance A in the reaction medium. B. It speeds up the reaction without it being consumed in the process. C. It provides energy to the reaction system D. It adjusts the pH of the reaction medium.Which two of the following apply to the products of an exergonic reaction? A. Have less energy than the reactants B. Are less ordered than the reactants C. Are more ordered than the reactants D. Have more energy than the reactantsEndergonic reactions do which of the following? Select all that apply. A. Are nonspontaneous B. Consume energy C. Are spontaneous D. Release energy
- Enzymes catalyze a chemical reaction by A. decreasing the amount of ATP required to activate a reaction B. increasing the amount of ATP required to activate a reaction C. slowing down the reaction to obtain more products D. increasing the reaction to obtain more products E. decreasing the amount of ATP required and obtaining more products.Which of the following is true of metabolism? A. Degradative reactions require an input of energy. B. Synthetic pathways are anabolic. C. Catabolism and anabolism are linked by O2. D. Catabolic reactions require the breakdown of ATP, and anabolic reactions generate ATP.Which of the following is true for all exergonic reactions? Group of answer choices A. The reactions are nonspontaneous B. A net input of energy from the surroundings is required for the reactions to proceed C. Some reactants will be converted to products D. The products have more total energy than the reactants E. The reaction proceeds with a net release of free energy
- What specific reaction cannot occur due to the presence of cyanide? A.Transfer of electrons to co-enzymes B.Inability to strip a carbon from pyruvate C.Transfer of electrons to and between carrier proteins D.Addition of a phosphate onto ADP to make ATPWhich of the following statement regarding enzymes is false? a.) they speed up reaction rates b.) they work within narrow temperature and pH ranges c.) The active site binds the substarate d.) They are consumed in the reactions they catalyzeWhich of the following reactions is the most exergonic? a Conversion of PEP to Pyruvate b Conversion of Glucose-6-phosphate to Glucose c All of the reactions are equally exergonic. d Hydrolysis of ATP
- Which of the following accurately describes how an enzyme functions? a. reduces the energy content of the products b. allows for the exothermic reaction of materials that are usually endothermic c. changes the reaction mechanism effectively reducing the activation energy d. shifts the equilibrium for the reactionWhat law of chemistry determines how much energy can be transferred when it is converted from one form to another? a. the first law of thermodynamics b. the second law of thermodynamics c. the conservation of matter d. the conservation of energyWhich of the following is TRUE about the enzymatic catalysis of a chemical reaction? A. It increases the energy of the transition state B. It decreases the free energy ∆G so that a reaction can proceed spontaneously C. It decreases the energy of the transition state D. It increases the forward and reverse rates