Light response definition
“It is a simple process of photosynthesis and that converts energy from the sun light into chemical energy in the form of NADPH(nicotinamide adenine dinucleotide phosphate) and ATP.” Where does light reaction take place.
What is Light Reaction?(Where does light reaction take place)
The reaction of light is also known as photolysis reaction and occurs in the presence of light. It usually occurs in the granoplast gran.
Photosystems contain pigment molecules. In plants, chlorophyll is one of the primary dyes that actively participate in the process of light reactions such as photosynthesis. Secondary pigments include carotenoids. Energy derive from the sun is absorbe by the chlorophyll into the thylakoid membrane of the chloroplast. The energy is then transferr-ed to ATP and NADPH which is generat-ed by two-electron transport chains. In this process water is use and oxygen is releas-ed .
Let us overview the mechanism involved in light response and light response.
Light reaction process(Where does light reaction take place)
The light reaction is the first phase of the photosynthesis process in which solar energy is convert-ed into chemical energy in the form of ATP and NADPH. Protein complexes and pigment molecules help in the production of NADPH and ATP.
The process of light reaction given below-
In this light reactions, energy from sunlight is get absorb-ed by the pigment chlorophyll and is convert-ed into chemical energy in the form of electron charge carrier molecules such as NADPH and ATP.
Light energy is use in both photosystems I and II present inside the thylakoid membrane of the chloroplast.
Carbohydrate molecules are obtaine from carbon dioxide using chemical energy collected during reactions.
The light energy is divide into water and subsequently ejects electrons from the light system II; The electrons then move from PSII to b6f (cytochrome) to photosystem I (PSI) and decrease as energy.
Electrons are reactivat-ed in photosystem I and high-energy electrons reduce NADP + to NADPH.
In the process of non-cyclic photophosphorylation, the cytochrome uses electron energy from photosystem II that pumps ions of hydrogen from the lumen to the stroma; Later, this energy allows ATP synthase to bind the ADP molecule to the third phosphate group, which then forms ATP.
In the process of cyclic photophosphorylation, cytochrome b6f uses electron energy from both photosystems I and II to form a number of ATP and stops producing NADPH, thus retaining the correct amounts of ATP and NADPH.
Thus, the light reaction uses light energy to drive the transport of electrons and the pumping of protons, producing a useful source for converting energy into a biologically useful form ATP and reducing NADPH .
What are the 4 steps of light reactions?
Light absorption in PSII
Light absorption in PSI
What is the light reaction called?
Light reactions, is generally known as photolysis reactions, it converts energy from the sun into chemical energy in the form of NADPH and ATP. These reactions must occur in light and in the chloroplasts of plants.
What is the equation of light reaction?
By using chemical symbols, the equation can be represent as : 6CO2 + 6H2O → C6H12O6 + 6O2. While this equation may not seem so complex, photosynthesis is a series of chemical reactions divide into two phases, the light reactions and the calcined cycle.
What is the purpose of light response?
The overall purpose of light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be use to fuel the combination of sugar molecules by the Calvin cycle. Light-dependent reactions begin in the agglomeration of pigment molecules and proteins called a light system.
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What is required for light reaction?(Where does light reaction take place)
CO2, water, chlorophyll and sunshine are four important requirements for this process. The photosynthesis process takes place in two stages: i.e- light reaction and dark reaction.
This is all about- Where does light reaction take place?
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