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 cellular respiration . During the course of chemiosmosis ions move down an electrochemical gradient (gradient of electrochemical potential) by ATP synthase. The ATP synthase harnesses the proton-motive force to phosphorylate adenosine diphosphate (ADP) and form ATP.

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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 cellular respiration. During the course of chemiosmosis ions move down an electrochemical gradient (gradient of electrochemical potential) by ATP synthase. The ATP synthase harnesses the proton-motive force to phosphorylate adenosine diphosphate (ADP) and form ATP.

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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? b) How are the amino acid side chains from the α and β subunits of ATP Synthase involved? 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 b) an inorganic phosphate is activated for ATP synthesis C) NADH can be recycld and than converted back to NAD+ for glycolysis d) because one ATP is generated

(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?

Answer 2

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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 cellular respiration. During the course of chemiosmosis ions move down an electrochemical gradient (gradient of electrochemical potential) by ATP synthase. The ATP synthase harnesses the proton-motive force to phosphorylate adenosine diphosphate (ADP) and form ATP.

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Answer 3

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

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 cellular respiration. During the course of chemiosmosis ions move down an electrochemical gradient (gradient of electrochemical potential) by ATP synthase. The ATP synthase harnesses the proton-motive force to phosphorylate adenosine diphosphate (ADP) and form ATP.

Expert Solution & Answer

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Answer 4

Question

Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 8.2, Problem 2C

Summary Introduction