In amylose, the most stable structure is a _____, which is stabilized by _____.
A) coiled helix; interchain hydrogen bonds
B) coiled helix; interchain covalent branching
C) coiled helix; hydrogen bonds to surrounding water molecules
D) straight, extended chain; interchain hydrogen bonds
E) straight, extended chain; hydrogen bonds to surrounding water molecules

Question

Quizplus · Accepted Answer

Amylose is a type of starch that is composed of linear chains of glucose molecules linked together through alpha-1,4 glycosidic bonds. The most stable structure of amylose is a coiled helix, which is stabilized by interchain hydrogen bonds. These hydrogen bonds form between the oxygen atom of the sixth carbon in one glucose molecule and the hydrogen atom attached to the third carbon in the next glucose molecule, creating a stable helical structure. There is no interchain covalent branching in amylose. The straight, extended chain structure is less stable than the coiled helix because it exposes more hydrophilic hydroxyl groups to water, reducing the overall stability of the molecule. Therefore, option A is the correct answer.

In Amylose, the Most Stable Structure Is a _____, Which