Assertion :Cyclic pathway of photophosphorylation first appeared in some eubacterial species. Reason: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.
Assertion :Cyclic pathway of photophosphorylation first appeared in some eubacterial species. Reason: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Cyclic pathway of photosynthesis appeared first in some eubacterial species. It is supposed to be the first evidence of the 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, a substance of low energy value, splits up into oxygen and hydrogen. Oxygen is used in the chloroplast. Non-cyclic photophosphorylation is the only natural process which adds molecular oxygen to the atmosphere.
Hence, the correct answer is 'Both Assertion and Reason are correct but the reason is not the correct explanation for assertion'.
Cyclic pathway of photosynthesis appeared first in some eubacterial species. It is supposed to be the first evidence of the 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, a substance of low energy value, splits up into oxygen and hydrogen. Oxygen is used in the chloroplast. Non-cyclic photophosphorylation is the only natural process which adds molecular oxygen to the atmosphere.
Hence, the correct answer is 'Both Assertion and Reason are correct but the reason is not the correct explanation for assertion'.
