Does Enriched Flour Contain Yeast?

Does Enriched Flour Contain Yeast? Does enriched flour contain yeast? Rice, rice flour, rice pasta, rice cakes and rice cereals. Corn flour (non-wheat flours too, such as potato, spelt – any without gluten) Chicken (grilled or baked, breaded with alternative flours) Beef. Fish and seafood. Eggs, quiches. Cheese (no mouldy cheeses) Does flour contain yeast?