Question
Assertion : Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved
✓
Answer
b
Cyclic pathway of photosynthesis is appeared first in some eubacterial species. It is supposed to be the first evidence of production of $ATP$ in the presence of light. During non-cyclic photophosphorylation photolysis of water takes place. Under the influence of light energy and the catalytic action of chlorophyll, water is split up into oxygen and hydrogen. Non-cyclic photophosphorylation is the only natural process which adds molecular oxygen to the atmosphere.
Cyclic pathway of photosynthesis is appeared first in some eubacterial species. It is supposed to be the first evidence of production of $ATP$ in the presence of light. During non-cyclic photophosphorylation photolysis of water takes place. Under the influence of light energy and the catalytic action of chlorophyll, water is split up into oxygen and hydrogen. Non-cyclic photophosphorylation is the only natural process which adds molecular oxygen to the atmosphere.
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