medical school

I'm writing fiction and I'm hoping some of you medical and research types can clarify something for me. What are the differences between the following: A PhD in biochemistry from a graduate school. A PhD in biochemistry from a medical school. An MD/PhD in biochemistry from a medical school. An...

First off, I should say that I worked for a probate attorney for a couple of decades & saw a upwards a thousand Wills during my tenure, but I can't recall a single instance where a whole body was directed to "science" by its owner. And we have a prominent medical school or two in the immediate...