Buckwheat is a grain by itself, has a very distinct flavor. Multi-grain is probably largely wheat with several different grains added. What and how many will vary.
Pancakes made with buckwheat flour. Buckwheat is a misnomer, it is an ancient grain ( sometimes called kasha) and not related to grasses, cereals, or wheat. The flour made from buckwheat is grain and gluten free.
All-purpose flour is made from wheat. Arrowroot is a different plant. Arrowroot flour is a starch which is primarily used as a thickener. Unlike all-purpose (wheat) flour, arrowroot is gluten free. Arrowroot also thickens at a lower temperature than wheat flour or corn starch.
Most people use an all-purpose white flour made from wheat, but I've seen recipes that called for whole wheat, rice, or buckwheat flours as well
There are several types of flour used in making noodles. The easiest and most accessible is AP (all purpose) flour, which is a wheat flour. Some people chose to use whole wheat flour. Just about any wheat flour can be used, though the results will be different with all. For example, self rising flour may result in the noodles coming out fluffier than they wou,ld normally, but they would still be fine. Another common flour used in noodles is buckwheat flour. This, along with rice flour, is what is normally used in Asian cooking, for things like soba and udon. Despite the misleading name, buckwheat flour is not actually a wheat flour.
Pancakes can be made with a variety of different flours. The most commonly used flour probably is all-purpose white wheat flour, but whole wheat, unbleached white, buckwheat, corn meal and even rye flour can produce very tasty pancakes.
Soda noodles are made from buckwheat.
A blini is a small pancake, of Russian origin, made from buckwheat flour, traditionally served with melted butter, sour cream and caviar or smoked salmon.
Flour is made from grains. The most commonly used flour in the developed world is wheat flour. Cornflour, rice flour, buckwheat flour, and flours made from other grains are also used widely.
Not all flour comes from wheat. Flour is also made from tapioca, rice, corn, buckwheat, and quite a variety of beans. Most likely there are other flours I haven't named, as well.
all purpose flour has bleach in it, therefore when you eat anything made with all purpose flour you are eating bleach.
Cavatellinis a pasta made from flour, eggs, and ricotta and gnocchi is made from potatoes
Egg noodles are made of flour and rice noodles are made from rice.