How many calories in 1 cup of rice flour?

None.

Cake flour is mad from soft wheat - a biennial. Bread flour is made from hard wheat - an annual. General purpose flour is a mixture of cake and bread flours.

Graham flour is a whole-kernel flour. Cake flour, bread flour and general purpose flour are made from kernels from which the gem has been removed.

Most other flours aren't made from wheat. Rice flour is made from rice, rye flour is made from rye, corn flour is made from corn. Generally speaking, any grain can be milled in a flour - you may have seen amaranth, spelt, etc., but if it doesn't say otherwise, flour means wheat flour, and most likely general purpose white wheat flour.

The primary difference between cake flour and bread flour is that bread flour contains more protein, and most of that protein is gluten. When you knead dough, the gluten forms a tough structure, and when the yeast produces carbon dioxide, the gluten traps it in the dough. That gives you a lighter, high-rising loaf of bread. With less gluten, the dough remains tender, which is what you probably want for cakes and cookies.