Question

Which of the following is correct statement?

• A. Starch is a polymer of $\beta$-D-glucose
• B. Amylose is a component of starch
• C. Proteins are biopolymers of only one type of amino acids
• D. Lactose is a disaccharide of $\alpha$-D-glucose and $\beta$-D-galactose

Hint:

Starch is composed of two main components: amylose (a linear polymer of $\alpha$-D-glucose) and amylopectin (a branched polymer of $\alpha$-D-glucose).

Answer 1

The Correct Option is B

Starch Composition Analysis

Starch is made up of two components: amylose and amylopectin. Amylose is a polysaccharide formed by long chains of α-D-glucose units, whereas amylopectin consists of α-D-glucose units linked through α-1,4 and α-1,6 glycosidic bonds. Therefore, amylose is indeed a component of starch.

The other options are incorrect because:

• Starch is a polymer of α-D-glucose, not β-D-glucose.
• Proteins are biopolymers made up of amino acids, but they are composed of more than one type of amino acid.
• Lactose is a disaccharide made up of β-D-glucose and β-D-galactose, not α-D-glucose.

Conclusion:

Amylose is a component of starch is the correct statement.