PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Combine with another oxygen atom to produce oxygen gas
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Remains in the thylakoid space to be used during ETC
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To recover electron deficiency in photosystems
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Used as final electron acceptor
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Detailed explanation-1: -In this process of photolysis (“splitting by light”), H2O molecules are broken into hydrogen ions, electrons, and oxygen atoms. The electrons replace those originally lost from chlorophyll.
Detailed explanation-2: -As the electron passes along these proteins, energy from the electron fuels membrane pumps that actively move hydrogen ions against their concentration gradient from the stroma into the thylakoid space.
Detailed explanation-3: -The split water molecule generates H+ during the light reactions. What happens to the H+ atoms? A) They build up inside the thylakoid membranes until they pass through an ATP synthase proton pump where the released energy helps make ATP.
Detailed explanation-4: -Why do hydrogen ions flow from the thylakoid space to the stroma through ATP synthase? A. They are pumped actively through ATP synthase. This uses up ATP energy and causes the production of ADP and phosphate.