A solution of starch at room temperature does NOT readily decompose to form a solution of simple sugars because ________.
A) the starch solution has less free energy than the sugar solution
B) the hydrolysis of starch to sugar is endergonic
C) the activation energy barrier for this reaction cannot easily be surmounted at room temperature
D) starch cannot be hydrolyzed in the presence of so much water
E) starch hydrolysis is nonspontaneous

Question

Quizplus · Accepted Answer

The hydrolysis of starch into simple sugars is an exergonic process, but it requires an input of energy to overcome the activation barrier. Since the activation energy barrier cannot easily be surmounted at room temperature, starch does not readily decompose into simple sugars. Therefore, option C is the correct answer. Options A, B, D, and E are incorrect because they do not provide a valid explanation for the given phenomenon.

A Solution of Starch at Room Temperature Does NOT Readily