Which statement accurately describes carbohydrates and their classifications?
1) Carbohydrates are composed of three elements: carbon, hydrogen, and oxygen.
2) The term saccharide is derived from the Latin word saccharum, which means sugar.
3) Carbohydrates are classified according to the number of saccharide units in each structure.
4) Polysaccharides are large, complex compounds made up of many saccharide units in long chains.
5) Monosaccharides are classified as simple carbohydrates, whereas disaccharides and polysaccharides are considered complex carbohydrates.