Textbook Question
Where does the citric acid cycle occur in eukaryotes?a. in the cytosol of cellsb. in the intermembrane space of mitochondriac. in the inner membrane of mitochondriad. in the matrix of mitochondria
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Ch. 9 - Cellular Respiration and Fermentation
Freeman7th EditionBiological ScienceISBN: 9783584863285
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Table of contents
- Ch. 1 - Biology: The Study of Life11
- Ch. 2 - Water and Carbon: The Chemical Basis of Life10
- Ch.3 - Protein Structure and Function11
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells10
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation16
- Ch. 10 - Photosynthesis14
- Ch. 11 - Cell-Cell Interactions14
- Ch. 12 - The Cell Cycle12
- Ch. 13 - Meiosis13
- Ch. 14 - Mendel and the Gene32
- Ch. 15 - DNA and the Gene: Synthesis and Repair8
- Ch. 16 - How Genes Work35
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria19
- Ch. 19 - Control of Gene Expression in Eukaryotes17
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers23
- Ch. 21 - Genes, Development, and Evolution13
- Ch. 22 - Evolution by Natural Selection17
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea17
- Ch. 27 - Diversification of Eukaryotes19
- Ch. 28 - Green Algae and Land Plants18
- Ch. 29 - Fungi19
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals20
- Ch. 32 - Deuterostome Animals19
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function16
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development18
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology16
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology16
- Ch. 54 - Biodiversity and Conservation Ecology16
Chapter 9, Problem 1
Where does the citric acid cycle occur in eukaryotes? a. in the cytosol of cells b. in the intermembrane space of mitochondria c. in the inner membrane of mitochondria d. in the matrix of mitochondria
Verified step by step guidance1
Identify the location where the citric acid cycle occurs. The citric acid cycle, also known as the Krebs cycle, is a key metabolic pathway that generates energy through the oxidation of acetate derived from carbohydrates, fats, and proteins into carbon dioxide.
Understand the structure of mitochondria. Mitochondria have an outer membrane, an inner membrane, and two internal compartments: the intermembrane space and the matrix.
Recall that the citric acid cycle involves enzymes that catalyze the reactions of the cycle. These enzymes are located in a specific part of the mitochondria.
Eliminate incorrect options: The citric acid cycle does not occur in the cytosol (option a), the intermembrane space (option b), or the inner membrane (option c) of mitochondria.
Conclude that the correct answer is d. The citric acid cycle takes place in the matrix of mitochondria, where the necessary enzymes and conditions are present.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Citric Acid Cycle
The citric acid cycle, also known as the Krebs cycle, is a series of chemical reactions used by all aerobic organisms to generate energy. It plays a crucial role in cellular respiration by oxidizing acetyl-CoA to produce ATP, NADH, and FADH2, which are essential for energy production.
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Acids
Mitochondria
Mitochondria are membrane-bound organelles found in eukaryotic cells, often referred to as the 'powerhouses' of the cell. They are responsible for producing ATP through oxidative phosphorylation and are the site of the citric acid cycle, specifically within their inner compartments.
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Mitochondrial Matrix
The mitochondrial matrix is the innermost compartment of the mitochondria, enclosed by the inner membrane. It contains enzymes necessary for the citric acid cycle, as well as mitochondrial DNA and ribosomes, facilitating the production of proteins required for mitochondrial function.
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Related Practice
Textbook Question
What does the chemiosmotic hypothesis claim?
a. ATP is generated using phosphates taken from intermediates in the electron transport chain.
b. ATP is generated using a phosphate gradient produced by glycolysis and the citric acid cycle.
c. ATP is generated using a proton-motive force that is produced by the electron transport chain.
d. Water is generated using electrons taken from NADH and FADH2 and transported through the electron transport chain.
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Textbook Question
After glucose is fully oxidized by glycolysis, pyruvate processing, and the citric acid cycle, where is most of its energy stored?
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