crafting personal statements that tailor to each program and asking three recommenders that can testify to your independent research abilities or general skills that a grad student needs to possess are keys to a great application. The rest will likely become footnotes if these two sections are top-notch. And of course, make sure you can live up to it in interviews.
Having a first-author publication will be the cherry on top.
Also, almost no biology or biomedical programs require GRE anymore. I will check with the specific programs tho