Question

Which of the following is a substance that belongs to the category of glucose, sucrose and maltose?

• A. Myoglobin
• B. Amino acid
• C. Starch
• D. Haemoglobin

Answer 1

The correct option is C Starch

Carbohydrates are chemically polyhydroxy aldehydes or ketones or the compounds which produce them on hydrolysis. Carbohydrates are sugars or substances that taste sweet and are collectively called as saccharides. They provide us with energy.

Carbohydrates can be classified as follows depending on the number of constituting sugar units obtained upon hydrolysis:

• monosaccharides (composed of one monomer unit only like glucose, fructose, etc.)
• disaccharide (composed of two monomer units like maltose which is made up of two units of glucose; sucrose made up of one unit of glucose and one unit of fructose)
• polysaccharide (made up of multiple monomer units example starch which is composed of multiple units of glucose).

Myoglobin and haemoglobin are protein molecules and protein molecules are polymers of amino acids.