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In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.
Assertion(A): Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason(R): Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.
  • a)
    Both assertion and reason are true and reason is the correct explanation of assertion.
  • b)
    Both assertion and reason are true but reason is not the correct explanation of assertion.
  • c)
    Assertion is true but reason is false.
  • d)
    Both assertion and reason are false.
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In the following question, a statement of Assertion(A) is given follow...
Cyclic pathway of photosynthesis appeared for the first time 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, a substance of low energy value, is split 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.
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In the following question, a statement of Assertion(A) is given followed by a corresponding statement of Reason(R). Read the statements carefully, and mark the correct answer.Assertion(A): Cyclic pathway of photosynthesis first appeared in some eubacterial species.Reason(R): Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?
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