Question

mc how many atp can be made from all of the nadh made from the complete breakdown of 4 glucose molecules? a 90 b 2 c 60 d 20 e 8 f 10 g 4 h 30 i 120

Explanation:

Step1: Recall ATP - NADH conversion

During cellular respiration, 1 NADH can produce 2.5 ATP through the electron - transport chain.

Step2: Determine NADH production per glucose

The complete breakdown of 1 glucose molecule via glycolysis, pyruvate oxidation, and the citric acid cycle produces 10 NADH.

Step3: Calculate total NADH from 4 glucose molecules

If 1 glucose molecule produces 10 NADH, then 4 glucose molecules produce $4\times10 = 40$ NADH.

Step4: Calculate total ATP

Since 1 NADH produces 2.5 ATP, 40 NADH will produce $40\times2.5=100$ ATP. However, if we consider the older, less accurate ratio of 3 ATP per NADH:
For 40 NADH, the number of ATP is $40\times3 = 120$ ATP.

Answer:

I. 120