MDCAT Biology MCQ #972

Starch grains in a potato tuber consist of amylose and amylopectin. What is the mechanism for creating the straight-chain component?

MDCAT Biology MCQ #972

  1. Question 1

    Q1. Starch grains in a potato tuber consist of amylose and amylopectin. What is the mechanism for creating the straight-chain component?

    • A) Formation of alpha 1-6 glycosidic linkages
    • B) Formation of alpha 1-4 glycosidic linkages
    • C) Formation of beta 1-4 glycosidic linkages
    • D) Formation of phosphodiester linkages between sugars

    Answer: Formation of alpha 1-4 glycosidic linkages

    Explanation: Amylose is a linear polymer with alpha 1-4 bonds. Amylopectin is branched and contains both alpha 1-4 and 1-6 bonds.