Assertion : Cyclic pathway of photosynthesis | vedclass

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(A) The cyclic pathway of photosynthesis is considered the most primitive form,appearing first in some eubacterial species. It is the earliest mechani

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The cyclic pathway of photosynthesis is considered the most primitive form,appearing first in some eubacterial species. It is the earliest mechanism for $ATP$ production using light energy.Non-cyclic photophosphorylation involves the photolysis of water,where water molecules are split into oxygen and hydrogen under the influence of light and chlorophyll. This process is the primary natural source of molecular oxygen in the atmosphere. Therefore,oxygen accumulation began only after the evolution of the non-cyclic pathway. Both statements are correct,and the Reason explains why oxygen accumulation is linked to the evolution of the non-cyclic pathway.

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.

Similar Questions

Which of the following is not required in the synthesis of carbohydrates?

Photosynthesis takes place in:

$A$: For every $CO_2$ molecule entering the $C_3$ cycle,three molecules of $ATP$ and two molecules of $NADPH$ are required.
$R$: Cyclic photophosphorylation takes place to meet the difference in the number of $ATP$ molecules.

Photosynthesis is:
$I.$ Endergonic process
$II.$ Exergonic process
$III.$ Chemical process
$IV.$ Physical process
Select the correct option.

During photosynthesis,which of the following processes occurs?

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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.