Textbook Question
Which of the following reactions in glycolysis produce ATP or NADH?
a. 1,3-bisphosphoglycerate to 3-phosphoglycerate
Ch.12 Food as Fuel An Overview of Metabolism
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696
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Table of contents
- Ch.4 Introduction to Organic Compounds75
- Ch.5 Chemical Reactions19
- Ch.6 Carbohydrates Life's Sweet Molecules62
- Ch.7 States of Matter and Their Attractive Forces8
- Ch.8 Solution Chemistry Sugar and Water Do Mix4
- Ch.10 Proteins Workers of the Cell89
- Ch.11 Nucleic Acids Big Molecules with a Big Role69
- Ch.12 Food as Fuel An Overview of Metabolism65
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696Not the one you use?Change textbook
Chapter 8, Problem 72a
Which of the following reactions in glycolysis produce ATP or NADH?
a. glucose to glucose-6-phosphate
Verified step by step guidance1
Step 1: Understand the glycolysis pathway. Glycolysis is a metabolic process that converts glucose into pyruvate, producing ATP and NADH as energy carriers. It consists of 10 steps, divided into two phases: the energy investment phase and the energy payoff phase.
Step 2: Analyze the given reaction: glucose to glucose-6-phosphate. This is the first step of glycolysis, where glucose is phosphorylated by ATP to form glucose-6-phosphate. The enzyme hexokinase catalyzes this reaction.
Step 3: Recognize that this reaction is part of the energy investment phase. In this phase, ATP is consumed to phosphorylate glucose, meaning no ATP or NADH is produced in this step.
Step 4: Recall that ATP production occurs later in glycolysis during substrate-level phosphorylation, and NADH is produced during the oxidation of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate.
Step 5: Conclude that the reaction glucose to glucose-6-phosphate does not produce ATP or NADH, as it is an energy-consuming step rather than an energy-producing step.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Glycolysis
Glycolysis is a metabolic pathway that converts glucose into pyruvate, producing energy in the form of ATP and NADH. It occurs in the cytoplasm of cells and consists of ten enzyme-catalyzed reactions. Understanding glycolysis is essential for identifying which steps produce ATP or NADH.
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ATP Production
ATP (adenosine triphosphate) is the primary energy currency of the cell. In glycolysis, ATP is produced during specific steps through substrate-level phosphorylation, where a phosphate group is directly transferred to ADP. Recognizing these steps is crucial for answering questions about energy yield in glycolysis.
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NADH Production
NADH (nicotinamide adenine dinucleotide) is a coenzyme that plays a key role in cellular respiration by carrying electrons to the electron transport chain. In glycolysis, NADH is generated during the oxidation of glyceraldehyde-3-phosphate. Identifying the reactions that produce NADH is important for understanding the overall energy balance of glycolysis.
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Related Practice
Textbook Question
Which of the reactions given in Problems 12.72 represent isomerizations where the reactants and products are structural isomers?
a. glucose to glucose-6-phosphate
b. glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate
c. dihydroxyacetone phosphate to glyceraldehyde-3-phosphate
Textbook Question
Refer to the diagram of the citric acid cycle in Figure 12.11 to answer each of the following:
c. Name the reaction that is coupled to GTP formation.
Textbook Question
Refer to the diagram of the citric acid cycle in Figure 12.11 to answer each of the following:
d. Name the reactions where secondary alcohols are oxidized to ketones.
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Textbook Question
How and where does sucrose undergo digestion in the body? Name the products.
Textbook Question
If glycolysis occurs in the cytoplasm and the citric acid cycle occurs in the mitochondrial matrix, how do the products of glycolysis get inside the mitochondrial matrix?