UCAS grades help-Please read

On my reference, my school will put down what I achieved at AS right at the top.

I.e

Grades achieved- Geography 85% (A), Chemistry 95% (A), Biology 22% (U)

I am just wondering, do I need to put down my unit grades on the UCAS form or can I leave them all pending (they are not cashed in)? Similarly, do you think it's a good idea to get my teachers to mention marks above 90% or will it no longer matter because of the above?

What went wrong in biology?!!