I was wondering about that, too. I think our Kaplan instructor said you could, but I'm not 100% sure. I also wanted to know if we could use the numeric pad on the keyboard to enter numbers in the calculator.
I know the keyboard is functional because I used up/down to scroll my passage, so probably you could...but I didn't try to select my answers with this method so no promises.
The keyboard is pretty useless, you only use the mouse. It is probably best to push the keyboard out of the way as to clear room for your markers and erase board