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Photosynthesis takes place in twp major stages:

1) the light-dependent stage converts light energy into chemical energy (ATP) and reducing power (NADPH); in this process water is broken down and oxygen is released

2) the light-independent stage uses the products of the light-dependent stage (ATP and NADPH) to reduce carbon dioxide to carbohydrate

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What is meant by light reaction of photosynthesis or light phrase of photosynthesis?

The biochemical reactions involving photolysis of water comes under light reaction. It is infect a chain of reactions commonly known as light phase.


Where do the hydrogen ions comes from for the photosystems of the light-dependent reactions?

splitting of water molecules


What kind of energy does photosynthesis start and end with?

Photosynthesis starts with the Light-Dependent reactions, which begins with radiant/light energy. By the time it has finished the Light-Independent Reactions, which comes after the dependent ones, it converts the light/radiant energy to glucose, or chemical energy.


The two major sets of reactions involved in photosynthesis are?

The two major sets of reactions involved in photosynthesis are the light-dependent reactions and the light-independent reactions (Calvin cycle). In the light-dependent reactions, light energy is used to produce ATP and NADPH, while in the Calvin cycle, ATP and NADPH are used to convert carbon dioxide into glucose.


Where does the energy come from to make NADPHin the light reactant?

The energy to make NADPH in the light reactions of photosynthesis comes from sunlight. Light energy is absorbed by chlorophyll molecules in the chloroplasts of plant cells, which triggers a series of reactions that ultimately produce NADPH.


Where does the energy for the light independent reactions of photosynthesis come from?

splitting of water molecules


Most of the light emitted by the sun comes from where?

Most of the light emitted by the Sun comes from its core, where nuclear fusion reactions occur. These reactions convert hydrogen into helium, releasing a tremendous amount of energy in the form of light and heat. This energy then travels outwards, eventually reaching the Sun's surface and being emitted into space as sunlight.


How are light dependent and independent reactions related?

The products of light-dependent reactions are used in light-independent reactions.


How do the light reactions and dark reactions work together?

The light reactions provide energy carriers for the dark reactions.


What are light light dependent reactions?

Light-dependent reactions are those that require light to proceed.


How are light reactions and dark reactions similar and different?

Differences: >light reactions occur in the thykaloid membranes, but dark occur in stroma >light reactions are light dependent, or they need light to take place, whereas dark reactions don't > dark reactions use the products of the light reactions >light reactions are the first step of photosynthesis and dark reactions are the second step Similarities: >both in photosynthesis Thats really the only similarity!!! hope this helps :)


Where does the heat of the sun come from?

The heat of the sun comes from nuclear fusion reactions in its core. These reactions convert hydrogen into helium, releasing enormous amounts of energy in the form of heat and light.