paha. well, i've just been revised biological molecules today cause it's the only thing I didn't get in class.. but now I get it.. so I'm over that hurdle Taken up today but I think it was worth it.
If you're not too keen on immunity I'd suggest you spend a day just focusing on immunity.
hey... ive done all my biology revision, But theres a few bits that i need help on, can i PM u ?