If a photosynthesising plant releases than normal amount of 180, it is is concluded that the plan 1) C,H,o, containing 18 2) H,O containing 18 12 3) CO, containing 18 O 0Zone 125.The first step in photosynthesis is 1) Excitation of chlorophyll by light 2) Ionisation of water 9ATP Synthesis 4) Eduction of assimilatory power
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The correct answer is option (1)
The correct answer is option (1)
- The first stage of photosynthesis is the light reaction occurring in the thylakoid membrane, which involves excitation of chlorophyll by Sunlight followed by the photolysis of water, oxygen release and formation of high energy compounds.
- The process that converts light energy into chemical energy takes place in Light harvesting complexes containing a multi-protein system called a photosystem.
- Two types of photosystems are present in the thylakoid membrane: photosystem I and photosystem II which contain primary and accessory pigments.
- The pigments in PS I can absorb lights below wavelength of 680 nm. The pigments in PS II can absorb lights below wavelength of 700 nm.
- Each photosystem plays a key role in capturing the energy from sunlight by exciting electrons. These energized electrons are transported by energy carrier molecules, which power the light-independent or dark reactions.