Angel Flake Biscuits

5 cups flour
2 tsp. baking powder
1 tsp. soda
3 Tbsp. sugar
2 tsp. salt
1 pkg. yeast, dissolved in 1/4 cup warm water
2 cups buttermilk
1 cup shortening
Sift together flour, baking powder, salt and soda. Mix well. Then add the shortening to this. Add buttermilk and yeast mixture. Form into a ball and place on greased plastic bag. Pull together and seal tightly. Don't let rise. Put in refrigerator for 12 hours. Bake as needed. Don't let it rise before baking. When you want to bake, just pinch off or roll out dough, for as many biscuits as needed. Return remaining dough to refrigerator. Bake in 400 degree oven for 20 minutes.