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

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

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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 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.

Column-$I$	Column-$II$
$A$. $PGA$	$P$. Act as oxygenase enzyme
$B$. $OAA$	$Q$. Primary acceptor of $CO_2$
$C$. RuBisCO	$R$. First product of $C_4$ pathway
$D$. RuBP	$S$. First product of $C_3$ pathway

Column-$I$	Column-$II$
$a.$ $OEC$	$(i)$ Primary e-acceptor
$b.$ $NADP$ reductase	$(ii)$ Photolysis of $H_2O$
$c.$ Succinyl $CoA$	$(iii)$ Outer surface of thylakoid membrane
$d.$ Phaeophytin	$(iv)$ Chlorophyll synthesis

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

Match the following columns:
Column-$I$ Column-$II$
$A$. $PGA$ $P$. Act as oxygenase enzyme
$B$. $OAA$ $Q$. Primary acceptor of $CO_2$
$C$. RuBisCO $R$. First product of $C_4$ pathway
$D$. RuBP $S$. First product of $C_3$ pathway

What is the quantum yield of photosynthesis (in $\%$)?

Photosynthesis is a $..............$ process.

Select the correct match.
Column-$I$ Column-$II$
$a.$ $OEC$ $(i)$ Primary e-acceptor
$b.$ $NADP$ reductase $(ii)$ Photolysis of $H_2O$
$c.$ Succinyl $CoA$ $(iii)$ Outer surface of thylakoid membrane
$d.$ Phaeophytin $(iv)$ Chlorophyll synthesis

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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.