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Which of the following is not included in light reactions or in the 'photochemical' phase?
- a)Water splitting
- b)Formation of high-energy NADPH
- c)Light absorption
- d)Release of ATP
Correct answer is option 'D'. Can you explain this answer?
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Which of the following is not included in light reactions or in the ph...
Light reaction is also called photochemical phase, which includes light absorption, water splitting oxygen release and formation of high energy chemical intermediates like ATP and NADPH.
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Which of the following is not included in light reactions or in the ph...
Release of ATP
Light reactions, also known as the photochemical phase, occur in the thylakoid membranes of the chloroplasts and are essential in converting light energy into chemical energy in the form of ATP and NADPH. The main components of light reactions include water splitting, light absorption, and the formation of high-energy NADPH.
Water splitting: During light reactions, water molecules are split into oxygen, protons, and electrons. This process, known as photolysis, provides electrons for the photosystems and releases oxygen as a byproduct.
Formation of high-energy NADPH: Through a series of electron transport reactions, the light energy absorbed by chlorophyll molecules is used to generate NADPH, a high-energy molecule that carries electrons for use in the Calvin cycle.
Light absorption: Chlorophyll and other pigments in the thylakoid membranes absorb light energy and transfer it to reaction centers, where it initiates the electron transport chain.
Release of ATP: The release of ATP is not a part of the light reactions. Instead, ATP is produced in the subsequent dark reactions (Calvin cycle) of photosynthesis, where it is used as an energy source for carbon fixation and the synthesis of carbohydrates.
In summary, while water splitting, formation of high-energy NADPH, and light absorption are all crucial components of light reactions, the release of ATP occurs in the Calvin cycle and is not directly involved in the photochemical phase of photosynthesis.
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Which of the following is not included in light reactions or in the photochemical phase?a)Water splittingb)Formation of high-energy NADPHc)Light absorptiond)Release of ATPCorrect answer is option 'D'. Can you explain this answer?
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