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During photosynthesis, the oxygen in glucose comes from:
- a)Carbon dioxide only
- b)Water only
- c)Both carbon dioxide and water
- d)Neither carbon dioxide nor water
Correct answer is option 'A'. Can you explain this answer?
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During photosynthesis, the oxygen in glucose comes from:a)Carbon dioxi...
In the process of photosynthesis, the oxygen atoms found in glucose come from carbon dioxide. During the Calvin cycle, carbon dioxide is fixed and reduced to produce glucose, incorporating its oxygen atoms into the sugar molecule.
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During photosynthesis, the oxygen in glucose comes from:a)Carbon dioxi...
Explanation:
Carbon dioxide as the source of oxygen in glucose:
- During photosynthesis, plants use carbon dioxide from the atmosphere as a source of carbon to build glucose molecules.
- The carbon dioxide is taken in by the plant through small openings in the leaves called stomata.
- The carbon atoms in carbon dioxide are used to form the carbon backbone of glucose molecules.
Water as the source of hydrogen in glucose:
- Water is also a crucial component in photosynthesis as it provides the hydrogen atoms needed to complete the glucose molecule.
- The water is absorbed by the plant's roots from the soil and transported to the leaves through the xylem vessels.
- During the light-dependent reactions of photosynthesis, water molecules are split into oxygen, protons, and electrons.
- The oxygen released during this process is a byproduct of photosynthesis and is released into the atmosphere.
Conclusion:
- Therefore, the oxygen present in glucose molecules produced during photosynthesis comes from the water molecules that are split during the light-dependent reactions, not from the carbon dioxide taken in from the atmosphere.
Carbon dioxide as the source of oxygen in glucose:
- During photosynthesis, plants use carbon dioxide from the atmosphere as a source of carbon to build glucose molecules.
- The carbon dioxide is taken in by the plant through small openings in the leaves called stomata.
- The carbon atoms in carbon dioxide are used to form the carbon backbone of glucose molecules.
Water as the source of hydrogen in glucose:
- Water is also a crucial component in photosynthesis as it provides the hydrogen atoms needed to complete the glucose molecule.
- The water is absorbed by the plant's roots from the soil and transported to the leaves through the xylem vessels.
- During the light-dependent reactions of photosynthesis, water molecules are split into oxygen, protons, and electrons.
- The oxygen released during this process is a byproduct of photosynthesis and is released into the atmosphere.
Conclusion:
- Therefore, the oxygen present in glucose molecules produced during photosynthesis comes from the water molecules that are split during the light-dependent reactions, not from the carbon dioxide taken in from the atmosphere.
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During photosynthesis, the oxygen in glucose comes from:a)Carbon dioxide onlyb)Water onlyc)Both carbon dioxide and waterd)Neither carbon dioxide nor waterCorrect answer is option 'A'. Can you explain this answer?
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