The figure given below is designed to show yeast respiration. In one of the tubes, there is yeast suspension in glucose solution. This solution was boiled before yeast was added to it. Which one of the following is the possible reason for boiling of sugar solution?

Options

A. To ensure aerobic fermentation.
B. To provide the initial warmth for the yeast to become active.
C. To remove the dissolved oxygen and carbon dioxide from the solution.
D. To remove dissolved carbon dioxide and trap the oxygen from the atmosphere.

Answer

C

Explanation

In yeast respiration experiment, glucose solution is boiled to sterilise it and to remove the traces of oxygen. It leaves behind the glucose needed for anaerobic respiration.