Answer:
where's the options for this question?
It means they may or may not have the same function but have similar structure depicting that the organisms may have had a common ancestor.
I choose the option (4) chemical bond.
Glucose is decomposed to 2 pyruvate, acetyl-CoA, and then entering the TCA cycle. All the energy such as ATP, NADH, and FADH2 is generated from braking the chemical bond.