Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 8.2, Problem 2C
Summary Introduction
To explain: The role of electron transport chain, proton gradient, and ATP synthase complex in chemiosmosis ATP synthesis.
Concept introduction: The process in which ions are moved by diffusion across a semi-permeable membrane to synthesize ATP is known as chemiosmosis. This process takes place inside the mitochondria during the aerobic
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Discuss the composition of the transition state for the formation of ATP by ATP Synthase.
a) Where is the active site for this enzyme located?
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c) Discuss the importance of Mg+2 in the mechanism of this enzyme.
the reaction catalyzed by glyceradehyde 3-phosphate dehydrigenase is based on NAD+ and a active site cysteine. Also another phosphate group is added. what is the reason for that?
a) because one ATP is consumed
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d) because one ATP is generated
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Chapter 8 Solutions
Biology (MindTap Course List)
Ch. 8.1 - Write a summary reaction for aerobic respiration...Ch. 8.1 - Prob. 1CCh. 8.1 - Prob. 2CCh. 8.2 - Prob. 2LOCh. 8.2 - Prob. 3LOCh. 8.2 - Add up the energy captured (as ATP, NADH, and...Ch. 8.2 - Prob. 5LOCh. 8.2 - Prob. 6LOCh. 8.2 - Prob. 1CCh. 8.2 - Prob. 2C
Ch. 8.2 - What are the roles of NAD+, FAD, and oxygen in...Ch. 8.2 - Prob. 4CCh. 8.3 - Summarize how the products of protein and lipid...Ch. 8.3 - Prob. 1CCh. 8.3 - Prob. 2CCh. 8.3 - Prob. 3CCh. 8.4 - Compare and contrast anaerobic respiration and...Ch. 8.4 - What is the fate of hydrogen atoms removed from...Ch. 8.4 - What accounts for the ATP yield of fermentation...Ch. 8.4 - Is chemiosmosis involved in fermentation? in...Ch. 8 - A chemical process during which a substance gains...Ch. 8 - The reactions of _____ take place within the...Ch. 8 - Before pyruvate enters the citric acid cycle, it...Ch. 8 - In the first step of the citric acid cycle, an...Ch. 8 - Which of the following is the major source of...Ch. 8 - The aerobic part of aerobic cellular respiration...Ch. 8 - Prob. 7TYUCh. 8 - A net profit of only 2 ATPs can be produced...Ch. 8 - When deprived of oxygen, yeast cells obtain energy...Ch. 8 - Which of the following is a correct ranking of...Ch. 8 - Prob. 11TYUCh. 8 - CONNECT Explain why the proton gradient formed...Ch. 8 - CONNECT How are the endergonic reactions of the...Ch. 8 - PREDICT Could the inner mitochondrial membrane...Ch. 8 - Prob. 15TYUCh. 8 - Prob. 16TYUCh. 8 - EVOLUTION LINK The reactions of glycolysis are...Ch. 8 - Prob. 18TYU
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- (a) Starting with one molecule of glucose, how many ATPs are produced during (I) aerobic and (II) anaerobic respiration? (b) In chemiosmotic (oxidative) phosphorylation, what is the most direct source of energy that is used to convert ADP + Pi to ATP and what the driving force for the ATP formation through ATP synthase?arrow_forwardDCCD (diocyclohexylcarbodiimide) inhibits oxidative phosphorylation when the substrate is mitochondrial NADH. DCCD is a drug that binds to ATP synthase and blocks proton transport through the ion channel. a) Explain what the consequences of DCCD on cellular energy production are. b) Suggest at least one other cellular effect of DCCD and explain this effect.arrow_forwardA proton gradient is created during the electron transport chain using the energy released from the oxidation of NADH and FADH2. The protons then cross the membrane through ATP synthase down their electrochemical gradient, and ATP is produced. This is an example of A) energy coupling B) cotransport C) allosteric regulation.arrow_forward
- 2.5 What is Chemio-osmotic gradient, and what is its importance in Metabolism 2.6 Glycolysis split Glucose into 2 Puryvate, where does a) Initial split, which Intermediate/s involved, b) which enzyme is involved and c) products produced....... 2.7 In ATP generation. Glycolysis does produce some ATPs, where does the bulk of ATP produced in the complete Oxidative? catabolic step/s and explain how? 3.1 Peter has been playing Volley Ball for 2hours now and he is very tired. He is now going home to rest. Answer the questions that follows from the scenario given: a) How will the process of Glycolysis be affected in this condition of Rest b) Explain his ATP at this stage of Rest d) How will the process of TCA cycle/Creb cycle be for Peter now at his rest d) The condition of Pyruvate Dehydrogenase (PDH) at this point of rest e) How will the state PFK (phospho fructo kinase) be at the beginning of his play (5) 3.2 NADH is mostly transported through which complexes in ETC (electron transport…arrow_forwardSelect the correct answer : Which of the following statements best describes the chemiosmotic theory of ATP synthesis by the electron transport system? A) As the protons pass through the system, electrons are moved from the mitochondrial matrix to the intermembrane space and ATP is formed as the electrons move back to the matrix through only one phosphorylation site. B) As the electrons pass through the system, ATP is synthesized at three different phosphorylation sites. C) As the electrons pass through the system, protons are moved from the mitochondrial matrix to the intermembrane space and ATP is formed as the protons ;move back to the matrix through the three different phosphorylation sites. D) As the electrons pass through the system protons are moved from the mitochondrial matrix to the intermembrane space and ATP is formed as the protons move back to the matrix through only one phosphorylation site.arrow_forwardOxidative phosphorylation has three reaction products.(a) What is the energy-carrying product?(b) What are the other two products?arrow_forward
- Cyanide is a chemical that irreversibly binds to (i.e. prevents the functioning of) the enzyme cytochrome oxidase, an important enzyme in the electron transport system. a) Explain, at the cellular level, why cyanide is a lethal chemical. b) Suggest at least one other cellular consequence of cyanide (i.e. what else happens to the electron transport system when cyanide is present), and an explanation of this effect.arrow_forward(a) NAD+ kinase catalyzes the ATP-dependent conversion of NAD+ to NADP+. How many reducing equivalents are involved in this reaction? (b) How many reducing equivalents are involved in the conversion of ferric ion to ferrous ion? (c) How many reducing equivalents are involved in reducing one molecule of oxygen gas to water?arrow_forwardPhotosynthesis and aerobic cellular respiration both rely on electron transport chains to generate ATP. Which of the following does not correctly identify similarities and differences in the ETCs of these processes? a) Electrons delivered to the ETC are used to generate a proton gradient across the membrane b) In photosynthesis, the facilitated diffusion of protons across the membrane generates ATP and glucose molecules; in cellular respiration, this process generates ATP c) In photosynthesis, electrons are delivered to the ETC by NADPH; in cellular respiration, electrons are delivered to the ETC by NADH and FADH2 d) In prokaryotes, active transport moves protons across the cell’s plasma membrane during photosynthesis and cellular respirationarrow_forward
- What steps in glycolysis generate substrate-level phosphorylation, and how many ATP molecules are generated in this way in this pathway? How does the generation of ATP by substrate-level phosphorylation differ from ATP generation by oxidative phosphorylation?arrow_forwardWhich of the following is the best definition of oxidative phosphorylation? Question 4 options: A) Electrons are passed through a series of carriers to O2 B) A proton gradient allows hydrogen ions to flow back into the cells through transmembrane protein channels, releasing energy that is used to generate ATP C) ATP is directly transferred from a substrate to ADP D) Electrons are passed through a series of carriers to an organic compoundarrow_forwardThermogenin 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 synthesisarrow_forward
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