Default [Q] Nexus 7 Root Question.

Hello guys! Just have a simple question here. Alright so, If I were to unlock the bootloader on a nexus 7 and just root it (no custom rom), would I have to unroot it for OTA updates? And if I do, would the bootloader need to be relocked? Normal recovery installed? I guess what my question really is here, is what needs to be stock before an OTA update for this device? Or is it okay to OTA update an unlocked rooted nexus 7? Thanks guy! Appreciate it! ^-^