Question

Simple carbohydrates, also referred to as sugars, include monosaccharides and disaccharides. Monosaccharides consist of a single sugar molecule, and disaccharides consist of two molecules of sugar joined together. Complex carbohydrates are larger molecules with many sugar molecules. Choose the correct statement about simple or complex carbohydrates. a) Lactose is a five-carbon monosaccharide found in ribonucleic acid (RNA). b) Sucrose is composed of one glucose molecule and one maltose molecule. c) Glucose, fructose, and galactose each contain 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. d) Carbohydrates contain carbon, hydrogen, and nitrogen. e) Oligosaccharides and polysaccharides are classified as simple carbohydrates.

Answer 1

Answer:

C is correct

Explanation:

A is wrong.

Lactose is a double sugar or disaccharide.

B. is wrong.

Sucrose is a double sugar as well as maltose . A double sugar is expected to contain 2 simple sugars. Sucrose contain glucose and fructose. Maltose itself is a double sugar.

C.is right

The three are simple sugar and they contain the exact atoms and numbers. In fact they are all isomers and essentially would have the same molecular formula. While glucose and fructose are functional group isomers, glucose and galactose are diastereoisomers.

D. is wrong.

Carbohydrates do not contain nitrogen

E. is wrong.

They are not simple carbohydrates but are polymers.