- Chlorophyll absorbs light energy from sunlight. - This light energy is used to split water molecules (photolysis of water) into oxygen, protons, and electrons. This is the oxidation of water. - The energy captured and the electrons/protons generated are then used to reduce carbon dioxide into glucose (a sugar). This is the reduction of carbon dioxide. Thus, chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.
Which one of the following statements about the process of photosynthesis is correct ?
Asked in UPSC CDS 2 2022 · UPSC NDA 2 2021 · Topic: Photosynthesis (Light-dependent reactions: Photosystems (PS I & PS II), electron transport chain)
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Answer: D. Chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.
More Biology questions
- Which of the following processes does not take place during photosynthesis ?
- फोटोͧसंथेͧसस एक प्रͩक्रया है जो ͩक हǐरत पादपों को उनके भोजन का ͧसंथेसाइज करने में मदद करती है। घटनाओं का सोपानी पात तथा के ͧमकल अͧभͩक्रयाएँ एक ͪवͧशष्ट अनुक्रम में होती हैं। उस घटना का चयन कीǔजए जो फोटोͧसंथेͧसस में नहीं होती है।
- Photosynthesis is a process that helps green plants synthesize their food. A cascade of events and chemical reactions take place in a specified sequential order. Choose an event that does not take place in photosynthesis.
- What is the principal function of the light- dependent reactions of photosynthesis ?
- Which one of the following is not a function of chlorophyll?
- In the photosynthesis, assimilatory power is generated during the following process :
- Which one of the following process occurs during photosynthesis? - (1) Reduction of carbohydrates into carbon dioxide. - (2) Conversion of light energy to chemical energy. - (3) Emission of light energy by chlorophyll. - (4) Conversion of hydrogen and oxygen into water.
- In which of the following processes, solar energy being converted into chemical energy?