Answer:
Cyclic forms
Explanation:
The hydrates of carbon are called carbohydrates. Carbohydrates are known as saccharides. The simplest carbohydrates are the monosaccharides such as glucose, fructose. Monosaccharides are the units of polysaccharides such as starch, cellulose. Polysaccharides are long chains of monosaccharides joined by glycosidic bonds in cyclic form. The glucose molecules in polysaccharides are linked in the cyclic form. It is formed when the hydroxyl group on carbon 5 linked to the aldehyde carbon 1 .
D) long chains of amino acids used for building, repair and maintenance
