Yes, that is the main ingredient in gluten.
Here are other grains that contain gluten:
Wheat
barley
rye
oats
not sure
I think that wheat is in gluten so if something is wheat free, it is not necessarily gluten free. But if something is gluten free, it is wheat free.
All wheat contains gluten.
No. Gluten is a protein found in wheat and other wholegrains such as barley and rye.
NO
Gluten Free Teacake
Gluten-Free Double Chocolate Chip Cookies
Gluten-Free Blueberry Muffins
Gluten Free Baking