The reaction centre in $PS$ $II$ has an absorption maxima at $............\,nm$.

Which of the following is the initiating step in photosynthesis?

Where is $NADP$ reductase enzyme located in the chloroplast? What is the role of this enzyme in proton gradient development?

If $E$ is the Emerson effect,$x$ is the rate of oxygen production in a mixed beam of light,$y$ is the rate of $O_2$ production in low wavelength light (short wavelength),and $z$ is the rate of $O_2$ evolution in high wavelength red light,what will be the value of $E$?

Pigment system-$I$ $(PS-I)$ conducts:

Herbicides prevent