OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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formed during hydrolysis
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produced by chlorophyll
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produced by ATP synthase
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formed from sunlight
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Detailed explanation-1: -Oxygen liberated during photosynthesis comes from the splitting or hydrolysis of water in the green plants. Cornelius van Niel experimentally proved for the first time that the oxygen liberated during photosynthesis comes from water and not from carbon dioxide.
Detailed explanation-2: -The correct option is A True. During photosynthesis, Carbon dioxide(CO2) gas is taken in through stomata from the atmosphere. Oxygen(O2) gas is released through stomata into the atmosphere as a by-product.
Detailed explanation-3: -Oxygen is produced during the first step of photosynthesis when water molecule undergoes hydrolysis to provide electrons and hydrogen ions needed for the photosynthesis. Oxygen itself is not necessary for the process, that is why it is simply released as a waste product.
Detailed explanation-4: -Oxygen (O2) is evolved during photosynthetic electron transport when water is split by the oxygen-evolving complex to provide protons and electrons to the chloroplastic electron chain, thereby generating ATP and NADPH-the energy source and reducing power for plant metabolism.