PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hydrolyse NADP+ at the end of the electron transport chain.
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Involve directly in the production of ATP.
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Replace the excited electron of reaction centre molecule in photosystem II.
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Involve directly in Calvin cycle.
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Detailed explanation-1: -Oxygen and hydrogen ions are also formed from the splitting of water. To replace the electron in the reaction center, a molecule of water is split. This splitting releases an electron and results in the formation of oxygen (O2) and hydrogen ions (H+) in the thylakoid space.
Detailed explanation-2: -Water is used to provide hydrogen ions and electrons but also produces oxygen. The electrons and protons are used to produce NADPH (the reduced form of nicotine adenine dinucleotide phosphoric acid) and ATP (adenosine triphosphate). ATP and NADPH are energy storage and electron carrier/donor molecule.
Detailed explanation-3: -Photosystem II is the first link in the chain of photosynthesis. It captures photons and uses the energy to extract electrons from water molecules.
Detailed explanation-4: -The light dependent process occurs in the thylakoid membranes of the chloroplast. The process, illustrated below, begins when light strikes a molecule of chlorophyll and excites electrons to a higher energy state. Water is split to replace the electrons, releasing oxygen as a by-product.