Question

The graph illustrates the data obtained from reactions of an enzyme with its specific substrate at various temperatures and at pH 6.
Based on the data, what would be the result if the experiment is carried out at $5^{\circ }C$?

• A. No prediction would be valid.
• B. An amount of product equal to that at ${20}^{\circ }C$ would be formed.
• C. An amount of product equal to that at the optimum temperature would be formed.
• D. An amount of product equal to that at ${60}^{\circ }C$ would be formed.
• E. Little or no product would be formed.

Answer 1

The correct option is E Little or no product would be formed.

According to the given graph, reaction start at the temperature 10 degree and the reaction rate is increased as the temperature is increased from 10 degree to 40 degree. It may be result of increased kinetic energy of the reactant molecules which in turn increase the collisions. The reaction rate is decreased as the temperature is increased above 40 degree and come to a halt at 70 degree. It may be due to altered enzymatic structure as higher temperatures.

Hence, if the reaction is carried out at 5 degree, there will be little or no product formed.

Therefore, the correct answer is option E.