John Hopkins would truly facilitate my interest
It's Johns Hopkins, not John Hopkins. Misspelling the name of the school in your essay will not get you in, I guarantee it.
At John Hopkins, I wish to major in Biology with a concentration in Biochemistry at the Bloomberg School of Public
Again with Johns/John Hopkins. Also, the Bloomberg School of Public what?
Overall this essay is well written but you have some mistakes that make it look like you don't care enough to proofread. My advice is to get someone else to read it who hasn't been looking at it the whole time and see what they come up with. I think you get your point across very eloquently and your ideas are good, but the essay needs some serious proofreading.