Mintleaf, I sensed that your GPA is somewhere around 3.1 to 3.2, right? I have known quite a few people with that GPA from Berkeley who didn't apply in their junior year. Although Berkeley is competitive but many in BMB, Genetics and Immunology obtain GPA around 3.4-3.5 nonetheless, and if you are neurobiology, developmental biology, pulling a 3.7 is not too difficult. The odds are not too favorably, realistically speaking, that is, if you are not a URM.
You have four options: 1)attend the post-bacc programs like people said. 2)attend a MPH program at a reputable school. 3)apply to grad school first (but it is a gamble since god knows what can happen in grad school). 4)Get over 33 on your MCAT and go to Peace Corp for two years.
I know one guy who had a 3.45 GPA in MCB-BMB and a 31 MCAT with plenty of research and volunteer. He applied to med schools three to four times. The first time, in junior year, all to no avail. Second time in Senior year, all to no avail. Then he worked in a biotech company for three years and got a first author publication in a clinical journal, and he applied last year, and got a few interviews and got into a school in the Northeast. Now he is somewhere in the Caribean before school starts.