PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these is NOT found in the ETC in non-cyclic photophosphorylation?
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Plastoquinone
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Ferredoxin
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Cytochrome complex
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NADH dehydrogenase
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Explanation:
Detailed explanation-1: -NADPH formation does not take place in cyclic photophosphorylation.
Detailed explanation-2: -The net result of non-cyclic phosphorylation is the formation of NADPH, oxygen and ATP molecules. Oxygen is produced as a waste product of photosynthesis.
Detailed explanation-3: -In cyclic photophosphorylation PS-I is involved and the excited electron follows a cyclic pathway. ATP is produced during this process. NADH and oxygen are not produced in the cycle.
Detailed explanation-4: -Therefore the electron acceptor in non-cyclic photophosphorylation is NADP+. In cyclic photophosphorylation excited electron does not pass on to NADP+ but is cycled back to the PS I complex through the electron transport chain.
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