UC to UC TAU Question

Hello, I applied to transfer to UC Irvine as a current student at UC Riverside for next year for a Business Admin. major. This past Fall Quarter, I had to take a Microbiology course to fill a general education requirement, and I made the grading for the class pass/fail. I was wondering how you think I should explain that in my TAU, please let me know. Any input and advice is greatly appreciated.