Binds to the DNA strand at a specific sequence of the gene called a promoter; Unwinds and unlinks the two strands of DNA; Uses one of the DNA strands as a guide or template; Matches new nucleotides with their complements on the DNA strand (G with C, A with U -- remember that RNA has uracil (U) instead of thymine (T))
Carbohydrates contain three major categories of molecules: monosaccharides (or simple sugars), disaccharides, and polysaccharides. 1. Monosaccharides: This group, also known as simple sugars, is the simplest carbohydrate form.
Carbohydrates are used for structure and energy storage. Carbohydrates, such as cellulose, are made of sugars. Carbohydrates (KAHR-boh-HY-DRAYTS) provide the cell with energy. Simple carbohydrates are sugars made from atoms of carbon, oxygen, and hydrogen.Inside cells, sugar molecules are broken down. This process provides usable energy for the cell. Simple sugar molecules can also be linked into long chains to form more complex carbohydrates, such as starch, cellulose, and glycogen.imple carbohydrates are sugars made from atoms of carbon, oxygen, and hydrogen. Inside cells, sugar molecules are broken down. This process provides usable energy for the cell. Simple sugar molecules can also be linked into long chains to form more complex carbohydrates, such as starch, cellulose, and glycogen.