Ferredoxin is a component of which of the following?

In Photosystem-$I$ $(PS-I)$,the reaction center chlorophyll is ......... .

The mechanism of $ATP$ formation both in chloroplast and mitochondria is explained by

Which of the following is the initiating step in photosynthesis?

$PS-II$ is found only in which of the following?

$A$: Assimilatory power in photosynthesis is generated in $ETS$ occurring in the thylakoid membrane.
$R$: They are needed for $CO_2$ reduction and $RuBP$ regeneration.