One molecule of glucose makes 30 molecules of ATP. How many molecules

of glucose are needed to make 6000 molecules of ATP in aerobic respiration?

A. 7200

B. 200

C. 100

D. 3600

Answer: B). 200

Explanation: During cellular respiration, glucose molecules are broken down in the presence of oxygen to generate ATP. Cellular respiration is divided into four stages: 1). the breakdown of glucose to two molecules of pyruvate in a process known as glycolysis,

2). the conversion of pyruvate to Acetyl CoA,

3). the oxidation of Acetyl CoA in the Krebs cycle and

4). further oxidation of NADPH and FADH2 to ATP in the electron transport chain.

30 molecules of ATP is produced in complete breakdown of one glucose molecules during cellular respiration. In order to produce 6000 molecules of ATP in aerobic respiration, the number of glucose needed is 6000/30 = 200 molecules of glucose.