Which process in respiration happens last?
a. glycolysis
b. the electron transport chain
c. pyruvate processing
d. the krebs cycle

Option B, The electron transport chain

Explanation:

The process of respiration involves four major steps in the following order –

a)Glycolysis

b)Pyruvate processing

c)  Krebs cycle

d)Electron Transport chain

In the glycolysis stage, glucose is broken down into pyruvate. In the next stage, pyruvate is processed to release CO2 and acetyl CoA. In the third stage i.e Krebs cycle acetyl CoA is oxidized to produce CO2, ATP, NADH and FAD is reduced to FADH2 and in the last stage electrons released from NADH and FADH2 flows across the membrane to make ATP.  

the correct answer is b