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What happens to the electron transport chain if oxygen is lacking? O More NADH would be formed. O The electrons would be recycled back to NAD+. O The protons would be released as hydrogen gas. O The proton gradient would disappear.

What happens to the electron transport chain if oxygen is lacking? O More NADH would be formed. O The electrons would be recycled back to NAD+. O The protons would be released as hydrogen gas. O The proton gradient would disappear.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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### Cellular Respiration and Electron Transport Chain #### Check Your Understanding 1. **What happens to the electron transport chain if oxygen is lacking?** - More NADH would be formed. - The electrons would be recycled back to NAD⁺. - The protons would be released as hydrogen gas. - The proton gradient would disappear. 2. **What is the primary function of the electron transport chain?** - to create carbon dioxide and water - to use available oxygen - to harvest the remaining energy available in a glucose molecule #### Detailed Diagrams and Processes The diagram provided illustrates the process of cellular respiration and the electron transport chain: - **Glucose Breakdown:** The process begins with glucose, which is represented as a hexagonal shape. - **Electron Carriers:** The glucose is processed and broken down, releasing energy carriers such as FADH₂ (Flavin Adenine Dinucleotide) and NADH (Nicotinamide Adenine Dinucleotide). - **Electron Transport:** These electron carriers transport electrons to the electron transport chain. - **Concentration Gradient:** The movement of electrons through the chain creates a concentration gradient (depicted by an increasing gradient image). - **ATP Production:** The proton gradient drives the production of ATP (Adenosine Triphosphate), the energy currency of the cell. This is shown by numerous ATP circles indicating the energy yield from the process. #### Check Your Understanding 3. **What is the overall purpose of cellular respiration?** - to break down glucose - to capture energy contained in the bonds of glucose in molecules of ATP - to make water and carbon dioxide - to convert the higher energy electrons into lower energy electrons to make ATP 4. **Where was the energy in the original glucose molecule?** - stored in the protons of a glucose molecule - stored in the oxygen atoms of a glucose molecule - stored in the bonds between the atoms of a glucose molecule - stored in the carbon atoms of a glucose molecule
Transcribed Image Text:### Cellular Respiration and Electron Transport Chain #### Check Your Understanding 1. **What happens to the electron transport chain if oxygen is lacking?** - More NADH would be formed. - The electrons would be recycled back to NAD⁺. - The protons would be released as hydrogen gas. - The proton gradient would disappear. 2. **What is the primary function of the electron transport chain?** - to create carbon dioxide and water - to use available oxygen - to harvest the remaining energy available in a glucose molecule #### Detailed Diagrams and Processes The diagram provided illustrates the process of cellular respiration and the electron transport chain: - **Glucose Breakdown:** The process begins with glucose, which is represented as a hexagonal shape. - **Electron Carriers:** The glucose is processed and broken down, releasing energy carriers such as FADH₂ (Flavin Adenine Dinucleotide) and NADH (Nicotinamide Adenine Dinucleotide). - **Electron Transport:** These electron carriers transport electrons to the electron transport chain. - **Concentration Gradient:** The movement of electrons through the chain creates a concentration gradient (depicted by an increasing gradient image). - **ATP Production:** The proton gradient drives the production of ATP (Adenosine Triphosphate), the energy currency of the cell. This is shown by numerous ATP circles indicating the energy yield from the process. #### Check Your Understanding 3. **What is the overall purpose of cellular respiration?** - to break down glucose - to capture energy contained in the bonds of glucose in molecules of ATP - to make water and carbon dioxide - to convert the higher energy electrons into lower energy electrons to make ATP 4. **Where was the energy in the original glucose molecule?** - stored in the protons of a glucose molecule - stored in the oxygen atoms of a glucose molecule - stored in the bonds between the atoms of a glucose molecule - stored in the carbon atoms of a glucose molecule
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