Which of the following is true about cell potential? a. It is the sum of the oxidation and reduction potentials b. It is the average of the oxidation and reduction potentials c. It is the reduction potential multiplied by the oxidation potential. d. It is the difference between the reduction and oxidation potentials.
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- Cells use primarily two ways of storing potential energy: 1) as concentration gradients and 2) in molecules. A) Explain how energy can be stored in these two forms and how it can be used to do other work. B) Propose an analogy that can explain each of these forms of energy storage using everyday items.The effect of high levels of ADP is to_inv_cellular respiration. a. increase the activity of specific enzymes b. decrease the activity of specific enzymes c. have no effect on the activity of specific enzymes d. slow down the pathwayGlycolysis is a degradative pathway of glucose.(a). Out of the four kinase enzymes, indicate which are reversible and which areirreversible reactions.(b). Out of the four kinase enzyme reactions, indicate which ones used ATP andwhich ones produced ATP.
- What would most likely promote increased rates of glycolysis? Select one: a. a higher concentration of Na in the environment compared to cells b. a higher concentration of K in cells compared to the environment c. a high concentration of ATP in cells d. a low concentration of ATP in cells e. presence of oxygen in cellsThermogenin in the inner membrane of brown fat cell mitochondria does all of the following except A) decrease the proton gradient. B) uncouple ATP synthesis from electron transport. C) generate heat. D) decrease ATP synthesis. E) increase ATP synthesisA cell in an active catabolic steady state state needs to maintain A. a high cytosolic (ATP/ADP) and a high cytosolic (NADH/NAD+) ratio. B. a high cytosolic (ATP/ADP) and a low cytosolic (NADH/NAD+) ratio. C. a low cytosolic (ATP/ADP) and a low cytosolic (NADH/NAD+) ratio. D. a low cytosolic (ATP/ADP) and a high cytosolic (NADH/NAD+) ratio.
- Which of the following statements about oxidation-reduction (redox) reactions is correct? A) The molecule that is oxidized loses electrons and is the oxidizing agent. B) The molecule that is reduced gains electrons and is the oxidizing agent. C) The molecule that is oxidized gains electrons and is the reducing agent.Which of the following statements is TRUE of the electron transport chain (ETC)? A. The movement of electrons down the ETC drives the formation of a proton (H+) gradient. B. The movement of H+ ions through ATP synthase drives the transfer of electrons down the ETC. C. The movement of electrons down the ETC drives the movement of ADP and phosphate through ATP synthase. D. The movement of H+ ions across the inner membrane of the mitochondria drives the transfer of electrons down the ETC.During cell respiration, what happens to the strength of the bonds between atoms in glucose vs those in the products water and carbon dioxide? Choose all answers that are correct. a. the carbon-hydrogen bonds in glucose are stronger than the carbon-oxygen bonds in carbon dioxide b. an oxidizing agent c.the carbon-hydrogen bonds in glucose are weaker than the carbon-oxygen bonds in carbon dioxide d.the carbon-hydrogen bonds in glucose are weaker than the oxygen-hydrogen bonds in water e.the carbon-hydrogen bonds in glucose are stronger than the oxygen-hydrogen bonds in water
- Enzymes have similar responses to both changes in temperature and pH. The effect of both is on the a. rate of movement of the substrate molecules. b. strength of the chemical bonds within the substrate. c. three-dimensional shape of the enzyme. d. rate of movement of the enzyme.Chemiosmosis involves a. the movement of electrons across the cell membrane. b. the movement of hydrogen atoms across a mitochondrial membrane. c. the movement of hydrogen ions across a mitochondrial membrane. d. the movement of glucose through the cell membrane.Which of the following statements is a lie?Select one:a.Specific enzymes in the electron transport chain are unaffected by feedback inhibition.b.Elevated levels of ADP will increase pathway activity in the electron transport chain.c.The rate of transport of electrons through the electron transport chain is regulated by feedback inhibition.