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What is Aerobic Respiration? Video Lecture | Science Class 7 (Old NCERT)

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1. What is aerobic respiration and how does it differ from anaerobic respiration?

Ans.Aerobic respiration is a biochemical process in which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water. It occurs in the presence of oxygen and involves several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation. In contrast, anaerobic respiration occurs in the absence of oxygen and typically results in less energy production, along with byproducts like lactic acid or ethanol.

2. What are the main stages of aerobic respiration?

Ans.The main stages of aerobic respiration include glycolysis, the Krebs cycle (also known as the citric acid cycle), and oxidative phosphorylation. Glycolysis occurs in the cytoplasm and breaks down glucose into pyruvate. The Krebs cycle takes place in the mitochondria and processes pyruvate to produce electron carriers. Finally, oxidative phosphorylation uses these carriers in the electron transport chain to generate ATP.

3. What is the role of oxygen in aerobic respiration?

Ans.Oxygen plays a crucial role in aerobic respiration as the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water, which is essential for maintaining the flow of electrons through the chain. This process allows for the efficient production of ATP, making aerobic respiration a more energy-yielding process compared to anaerobic respiration.

4. How much ATP is produced during aerobic respiration?

Ans.During aerobic respiration, a total of approximately 36 to 38 ATP molecules can be produced from one molecule of glucose, depending on the efficiency of the process and the type of cell. Glycolysis yields 2 ATP, the Krebs cycle produces 2 ATP, and oxidative phosphorylation generates about 32 to 34 ATP through the electron transport chain.

5. What are some examples of organisms that use aerobic respiration?

Ans.Examples of organisms that use aerobic respiration include humans and most animals, plants, and many types of fungi and bacteria. These organisms rely on oxygen to efficiently convert glucose into energy, which is essential for their growth, reproduction, and overall metabolic functions.

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	Science Class 7 (Old NCERT) 111 videos\|435 docs\|28 tests

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111 videos|435 docs|28 tests

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