Question
Biology Question on respiration in plants
What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?
A
Four
B
Six
C
Two
D
Eight
Answer
Two
Explanation
Solution
Two molecules of pyruvate are produced by each glucose molecule. During the partial oxidation of one glucose molecule to produce these two pyruvate molecules, four ATP molecules are generated. However, two ATPs are consumed during the preparatory phase of glycolysis. As a result, there is a net gain of two ATP molecules.