Lab with extra class

Hey
I have an opening for one extra class to take and I decided to take microbiology. How important do you think it is to take the lab with it according to the med schools?? It is not one of the common prereqs and a lab is not required but do you think that they would ask how come I didn't take the lab? This summer I am taking Orgo 1 and MicroBio and I think that the MicroBio lab will be a little too much so you think they will question why I didn't take the lab? Or if I don't take the lab should I not even take the class at all?? thanks