PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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photosynthesis:carbon dioxide, G3P, and electrons that are given to photosystem II.
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the Calvin cycle:carbon dioxide, G3P, and electrons that are given to photosystem II
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photolysis:oxygen, hydrogen ions (protons), and electrons that are given to photosystem II.
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chemiosmosis:oxygen, hydrogen ions (protons), glucose and electrons that are given to photosystem II.
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Detailed explanation-1: -The splitting of water molecules is called photolysis of water.
Detailed explanation-2: -In this process, PSII catalyzes the photolysis of water, producing O2 and releasing electrons into the photosynthetic electron transport (PET) chain, ultimately generating reduced ferredoxin that can be used by hydrogenase to reduce protons to hydrogen (Fig.
Detailed explanation-3: -A molecule of water splits to release an electron, which is needed to replace the one donated. Oxygen and hydrogen ions are also formed from the splitting of water. The replacing of the electron enables chlorophyll to respond to another photon.
Detailed explanation-4: -The enzyme NADP reductase then transfers electrons from ferrodoxin to NADP+, generating NADPH. The passage of electrons through photosystems I and II thus generates both ATP and NADPH, which are used by the Calvin cycle enzymes in the chloroplast stroma to convert CO2 to carbohydrates (see Figure 2.39).
Detailed explanation-5: -Photosynthesis: A light reaction that sets plants apart This absorption of light energy helps split water molecules into hydrogen and oxygen, generating free electrons.