PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The L-D reactions need CO2 and light energy, and the L-IND reactions needs water and O2.
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The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH, and CO2.
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The L-D reactions can only occur during daylight, and the L-IND reactions can only occur during the night.
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The L-D reactions need water and CO2, and the L-IND reactions need CO2 and light.
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Detailed explanation-1: -Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis? The L-D reactions need CO2 and light energy, and the L-IND reactions needs water and O2.
Detailed explanation-2: -The light dependent reactions are the reactions in which utilize sunlight to split water, to produce ATP and NADPH. The light independent reactions are the reactions that utilize ATP and NADPH, to utilize carbon fixation of carbon dioxide, to create a three carbon sugar called glyceraldehyde 3 phosphate.
Detailed explanation-3: -What is the difference between light and dark reaction? The light reaction is the initial stage of photosynthesis which traps light energy to produce ATP and NADPH, whereas dark reaction is the second step of photosynthesis which utilizes the energy from ATP and NADPH to produce glucose.
Detailed explanation-4: -In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In the light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.
Detailed explanation-5: -The light reactions of photosynthesis involve light-driven electron and proton transfers, which occur in the thylakoid membrane, whereas the dark reactions involve the fixation of CO2 into carbohydrate, via the Calvin–Benson cycle, which occurs in the stroma (Figure 3).