A) \[C{{O}_{2}}\]
B) \[{{H}_{2}}O\]
C) phosphoglyceric acid
D) chlorophyll
Correct Answer: B
Solution :
Photosynthesis occurs in two phases-light reaction and dark reaction. In photosystem-II of light reaction photolysis of water takes place during, which oxygen is released. \[4\,{{H}_{2}}O4\,{{H}^{+}}+4\,O{{H}^{-}}\] \[4\,O{{H}^{-}}2\,{{H}_{2}}O+{{O}_{2}}+4\,{{e}^{-}}\] Chlorophyll is the reaction centre of the light reaction. During dark reaction of photosynthesis \[C{{O}_{2}}\]combined with RuBP to form phosphoglyceric acid (the first stable product in \[{{C}_{3}}\] cycle). The carboxylation process is catalysed by Rubisco enzyme.
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