The first electron acceptor in Photosystem-$I$ $(PS-I)$ is:

Assertion $(A) : H^+$ gradient across the thylakoid membrane is essential for the formation of $\text{ATP}$.
Reason $(R) :$ Breakdown of $H^+$ gradient due to the movement of protons through $F_0$ of $\text{ATP}$ synthase releases enough energy to activate $\text{ATP}$ synthase enzyme that catalyses the formation of $\text{ATP}$.

Which pigment acts as the reaction center during photosynthesis?

During the formation of glucose,which of the following is obtained from water?

Which cofactor is essential for the photolysis of water?

Which of the following is associated with the transfer of electrons in photosynthesis?