Photosynthesis (light dependent stage) 0.0 / 5 ? BiologyHuman, animal and plant physiologyA2/A-levelCCEA Created by: Football03Created on: 07-03-22 16:56 Where does the light dependent stage take place? In the thylakoid membrane 1 of 21 The arrangement of the accessory pigments allows for...? Enough energy to pass to the reaction centre allowing electrons in chlorophyll a molecule to become excited in the process of PHOTOACTIVATION 2 of 21 What happens to the electrons in chlorophyll a ,if enough energy is available ? They are emitted and taken up by an electron acceptor 3 of 21 What does chlorophyll a become? A chlorophyll donor 4 of 21 What happens to the carriers as they take up and pass on electrons? They become progressively reduced&oxidised in a series of redox reactions 5 of 21 Electrons lose.... as they pass along the chain? Energy 6 of 21 What is photophosphorylation? When there is sufficient energy available to make ATP from ADP & Pi 7 of 21 How does the replacement of lost electrons from the reaction centre occur? Through photolysis; the splitting of water molecules 8 of 21 When water is split,the hydrogen dissociates into ..? Hydrogen ions(protons) and electrons 9 of 21 These electrons replace the electrons lost during...? Photoactivation 10 of 21 What is given off as a waste product during the light dependent reaction? Oxygen 11 of 21 What photosystem is used to emit electrons? Photosystem 2 (680nm) 12 of 21 What does the chlorophyll a molecule in photosystem 1 emit? Electrons if enough light energy reaches the antenna complex 13 of 21 What happens to these electrons? Trapped by another electron acceptor and passed onto NADP to form NADPH 14 of 21 How is NADP reduced by the hydrogen? The electrons combine with the hydrogen ions (form photolysis) 15 of 21 In photosystem 1 electrons are lost from the chlorophyll a and are replaced by...? Electrons passing down the electron chain (electrons originated in photosystem 2) 16 of 21 What are the end products of the light-dependent reaction? ATP and NADPH (BOTH USED IN LIGHT-INDEPENDENT REACTION) 17 of 21 The electron pathway and reactions in the light dependent stage are described as? The Z-scheme 18 of 21 What is the final electron acceptor in photosynthesis ? NADP is the final electron acceptor 19 of 21 The production of ATP is non cyclic due to ? Electrons passing through electron transport chain needing to be replaced 20 of 21 The production of ATP in the light dependent stage is known as ...? Non-cyclic photophosphorylation 21 of 21
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