Yes, you can use a ohm meter to check for continuity.
With all the burners switches in the off position the switches should be open and have no continuity.
So with all of them off it should be easy to tell what one is shorted or closed with your ohm meter.
Here is the diagram for model MGR6772BDB
Also the part numbers I listed above are the correct ones for your model.
You can click on the part numbers or photos above to see the prices.