To determine the molecule that crosses the outer mitochondrial membrane in the cytosol to intermediate space direction in the dihydroxyacetone phosphate − glycerol 3 − phosphate shuttle system. Concept introduction: In the glycolysis metabolic pathway, a glucose molecule breaks down into two pyruvate molecules.ATP and NADH are produced along with pyruvate. The net overall equation for the glycolysis process is as follows: Glucose + 2 ADP + 2 P i + 2 NAD + → 2 pyruvate + 2 NADH + 2 ATP + 2 H + + 2 H 2 O Electron transfer chain is defined as a series of biochemical reactions in which the electrons and hydrogen ions ( H + ) that are obtained from NADH and FADH 2 react with molecular oxygen ( O 2 ) to produce water ( H 2 O ) . NADH and FADH 2 are oxidized through the redox reactions. A transport system shuttle that involves dihydroxyacetone phosphate − glycerol 3 − phosphate transports the electrons from NADH across the outer membranes of mitochondria. The net overall reaction for the shuttle process is as follows:

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Chapter 24, Problem 24.50EP

(a)

Interpretation Introduction

Interpretation: To determine the molecule that crosses the outer mitochondrial membrane in the cytosol to intermediate space direction in the dihydroxyacetone phosphate−glycerol 3−phosphate shuttle system.

Concept introduction: In the glycolysis metabolic pathway, a glucose molecule breaks down into two pyruvate molecules.ATP and NADH are produced along with pyruvate. The net overall equation for the glycolysis process is as follows:

Glucose+2ADP+2Pi+2NAD+→2pyruvate+2NADH+2ATP+2H++2H2O

Electron transfer chain is defined as a series of biochemical reactions in which the electrons and hydrogen ions (H+) that are obtained from NADH and FADH2 react with molecular oxygen (O2) to produce water (H2O). NADH and FADH2 are oxidized through the redox reactions.

A transport system shuttle that involves dihydroxyacetone phosphate−glycerol 3−phosphate transports the electrons from NADH across the outer membranes of mitochondria. The net overall reaction for the shuttle process is as follows:

(b)

Interpretation Introduction

Interpretation: To identify the molecule that crosses the outer mitochondrial membrane in the intermembrane space to cytosol direction in the dihydroxyacetone phosphate−glycerol 3−phosphate shuttle system.

Concept introduction: In the glycolysis metabolic pathway, a glucose molecule breaks down into two pyruvate molecules.ATP and NADH are produced along with pyruvate. The net overall equation for the glycolysis process is as follows:

Glucose+2ADP+2Pi+2NAD+→2pyruvate+2NADH+2ATP+2H++2H2O

Electron transfer chain is defined as a series of biochemical reactions in which the electrons and hydrogen ions (H+) that are obtained from NADH and FADH2 react with molecular oxygen (O2) to produce water (H2O). NADH and FADH2 are oxidized through the redox reactions.

A transport system shuttle that involves dihydroxyacetone phosphate−glycerol 3−phosphate transports the electrons from NADH across the outer membrane of mitochondria. The net overall reaction for the shuttle process is as follows:

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