Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
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,A) If both Assertion and Reason are true and Reason is the correct explanation of the Assertion.
B) If both Assertion and Reason are true but the Reason is not the correct explanations of Assertion.
C) If Assertion is true, but Reason is false.
D) If both Assertion and Reason are false.
Correct Answer: B
Solution :
Cyclic pathway of photosynthesis appeared first in some eubacterial species for ATP production. Non-cyclic photophos- phorylation is the only natural process, which adds molecular oxygen to the atmosphere by the photolysis of water.
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