Does it matter where you earn your pre-reqs?
I think the general rule of thumb is...
1. CC courses are acceptable if you transfer to a 4-year degree program after doing 2 years at a CC.
2. CC courses taken while in a 4-year degree program at a University are frowned upon, and some places may figure you took the CC courses to avoid similarly "harder" versions of the same class at your 4-year program. Basically, if you are at a university, take the rest of your course there and don't jump around to a CC.
3. If you are a post-bacc and you already attended a 4-year degree program, going back to a CC program to do prereqs or to boost your GPA is frowned upon. Goto another university instead of a CC.
In the end, it's up to what each particular medical school wants. In general, they will favor identical applicant's GPAs to those that went to what they cosider a more "challenging" and "competetive school" (4 year programs vs. CC)
Remember, adcoms aren't interested in anything other than whether they think you can make it through 4 years of medical school and pass the boards. From what I've heard, graduate-level coursework doesn't make up for low undergrad grades as, paradoxically, they think that high grades in graduate school are the norm and not representative of competition with other students.
Post-bacc undergraduate work grades are much more important, and as mentioned the MCAT to show your national-level competitiveness.
Graduate school grades can't make up for undergrad grades because they are counted seperately by AMCAS. DO schools combine both. Be careful with your wording. Graduate level courses CAN actually make up for low undergrad grades. Case in point, students who do well in SMPs. True, they take med school level courses, BUT, as defined by AMCAS, these courses still fall under the graduate level classification. So it really all depends on ones situation.
Lastly, I wouldn't call the MCAT's purpose as to show ones national-level competativeness. You certainly can derive that from your score based on your percentile. Really, you can rank everyone by GPA and still get a percentile of where you rank up among the thousands of applicants. For whatever its worth, MCAT is probably more of a way to standardize the courses you took (e.g., OChem, GChem, Bio, Physics). There is so much variability among undergrad courses at different schools that its hard to say if one A was easier to get than another A. Additionally, a good MCAT score shows correlation with how well you do on USMLE Step I.
Ultimately, despite all the arm waving about undergrad GPA and MCAT being very important (and they are), but in the end, most schools look at the whole application. I'm sure ScottishChap, or some of the other non-trads can say that grad school grades and GPA can play a pivotal role in getting into med school. But nobody can really make a definative assertion to that, since there are SO many variables involved. I would tend to agree with ScottishChap, but at the very least, having a good grad GPA still helps. To what extent, I can't say.
Correct, but adcoms on SDN have said that undergrad grades are looked at more than graduate school grades because they reflect more competition between your peers (i.e. harder to get that "prized" A) and they require you to learn lots and lots of information compared to a very focused graduate course. It's not that graduate grades are worthless, it's that they aren't looked at as much as undergraduate grades. This is just what I have heard from reading adcom posts on SDN.
Yes; schools do look at the whole application. But with such a large pool of students with high GPA and high MCAT scores, they can't help but select those with good "whole applications" that also have high GPA and MCAT scores. It's just inevitable. Frankly, I think they way they do it is (and this is just my opinion)...