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Electron Transport Video Lecture | Biology Class 11 - NEET
FAQs on Electron Transport Video Lecture - Biology Class 11 - NEET
| 1. What is electron transport? |  |
Ans. Electron transport refers to the process by which electrons are transferred from one molecule to another in a series of redox reactions. It occurs in the inner mitochondrial membrane during cellular respiration and plays a crucial role in generating ATP, the energy currency of the cell.
| 2. What are the components of the electron transport chain? | |
Ans. The electron transport chain is composed of a series of protein complexes, including NADH dehydrogenase (complex I), succinate dehydrogenase (complex II), cytochrome bc1 complex (complex III), cytochrome c, and cytochrome oxidase (complex IV). These complexes work together to transfer electrons and protons across the inner mitochondrial membrane.
| 3. How does electron transport generate ATP? | |
Ans. Electron transport generates ATP through a process called oxidative phosphorylation. As electrons are passed along the electron transport chain, protons are pumped across the inner mitochondrial membrane, creating a proton gradient. This gradient drives the ATP synthase enzyme to produce ATP from ADP and inorganic phosphate.
| 4. What is the role of oxygen in electron transport? | |
Ans. Oxygen serves as the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water, preventing the accumulation of excessive electrons and maintaining the flow of electrons through the chain. Without oxygen, electron transport would be halted, leading to a lack of ATP production.
| 5. How is electron transport regulated? | |
Ans. Electron transport is regulated through several mechanisms. One important regulatory mechanism is the availability of substrates, such as NADH and FADH2, which provide electrons to the electron transport chain. Additionally, the activity of the protein complexes in the chain can be modulated by feedback inhibition and the concentration of ADP and ATP. These regulatory mechanisms ensure that electron transport is tightly controlled and adapted to the energy needs of the cell.
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