Roles of photosystems in photosynthesis ?

Hi could someone please help me make a distinction between:

The role of the PSII vs the role of the PSI in photosynthesis?

The role of the light dependant stage relative to the role of the light independent stage in photosynthesis?

I'm getting a little mixed because I know the mechanisms but when it comes to questions where, say the light dependant stage is compromised the effects it has on photosynthesis I get suck. So I just need someone to outline for me their roles....

Please

Reply 1

abitpissy

Whoops how do I get this moved?