Which Came First, the Galaxy or the Black Hole?

Every Wednesday Michio Kaku will be answering reader questions about physics and futuristic science on his blog at Big Think.  If you have a question for Dr. Kaku, just post it in the comment section on his blog; Dr. Kaku’s Universe and check back on Wednesdays to see if he answers it. Today, Dr. Kaku addresses a question posed by Andy Speight: Are the supermassive black holes at the center of galaxies involved in the formation of those galaxies?