what is the relationship between light intensity and atp production?
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With greater light intensity, more thylakoid membranes are able to perform photosynthesis as there is more light available to provide the electrons with energy necessary for this process.
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Intensity of light is proportional to energy of light, which is proportional to frequency of light (and number of photons). Frequency of light is inversely proportional to wavelength of light. Thus, intensity is inversely proportional to wavelength, if other variables are held constant.
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Summary. The light reactions capture energy from sunlight, which they change to chemical energy that is stored in molecules of NADPH and ATP. The light reactions also release oxygen gas as a waste product.
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The longer duration of light brought about increased biomass of C. vulgaris (Fig. 2). However, light intensity showed different effects on biomass; increase in light intensity from 37.5 to 62.5 μmol photons m−2 s−1 resulted in increased biomass, but at 100 μmol photons m−2 s−1, biomass decreased.
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Generating an Energy Carrier: ATP In the light-dependent reactions, energy absorbed by sunlight is stored by two types of energy-carrier molecules: ATP and NADPH. The energy that these molecules carry is stored in a bond that holds a single atom to the molecule.
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Under certain conditions, the photoexcited electrons take an alternative path called cyclic electron flow, which uses photosystem I (P700) but not photosystem II (P680). This process produces no NADPH and no O2, but it does make ATP. This is called cyclic photophosphorylation.
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The light reactions provide the Calvin cycle with oxygen for carbon fixation, and the Calvin cycle provides the light reactions with sugars to produce ATP. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the Calvin cycle provides water and electrons to the light reactions.
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The light reactions use light energy to produce ATP and NADPH. The molecules that function in the light reactions are built into the thylakoid membrane. This equipment includes two complexes called photosystem I (PSI) and photosystem II (PSII). ... Together, PSI and PSII move electrons from water to NADP+, forming NADPH.
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Light intensity Without enough light, a plant cannot photosynthesise very quickly - even if there is plenty of water and carbon dioxide and a suitable temperature. Increasing the light intensity increases the rate of photosynthesis, until some other factor - a limiting factor - becomes in short supply.
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The two are linked together and controlled by enzymes. The light-dependent reaction is a photochemical reaction taking place in the thylakoid membranes of chloroplasts, where light energy is transformed into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH).
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The ATP and NADPH from the light-dependent reactions are used to make sugars in the next stage of photosynthesis, the Calvin cycle. In another form of the light reactions, called cyclic photophosphorylation, electrons follow a different, circular path and only ATP (no NADPH) is produced.
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Intensity is the power per square meter. Power is energy per second. ... Greater energy in a single photon means higher frequency and shorter wavelength. Intensity means a greater number of photons per second per square meter.
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Briefly describe the 2 phases of photosynthesis. Light-dependent reactions: light energy is absorbed and then converted into chemical energy, in the form of ATP and NADPH. Light-independent reactions: with the ATP and NADPH that were formed in light-dependent reactions is used to make glucose.
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ATP and NADPH are the main product of the Light reactions of photosynthesis. ... ATP provides the free energy to power the Calvin Cycle (a.k.a. the Dark reactions). NADPH is the key electron donor (reducing agent). This provides the hydrogen and electrons needed to combine carbon dioxide into carbohydrate molecules.
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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.
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The overall equation for the light-dependent reactions under the conditions of non-cyclic electron flow in green plants is: 2 H2O + 2 NADP+ + 3 ADP + 3 Pi + light → 2 NADPH + 2 H+ + 3 ATP + O. Not all wavelengths of light can support photosynthesis.
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Beginning with the absorption of light by chlorophyll, the light reactions convert light energy into chemical energy in the form of ATP and NADPH. The ATP provides the energy, and the NADPH supplies the electrons for the Calvin cycle, which converts carbon dioxide to sugar.