Question

Choose the correct answers from the alternatives given :
In the last stage of aerobic respiration is the final acceptor of electrons that originally resided in glucose.

• A. NADH
• B. hydrogen
• C. oxygen
• D. water

Answer 1

The correct option is C oxygen

Aerobic respiration is the complete oxidation of organic foods which has three steps :

1. Glycolysis - Glucose molecule is broken down into two molecules of pyruvate. Glucose is a sugar molecule that is made of CHO (Carbon, Hydrogen, Oxygen).
2. Krebs cycle is the middle of the initial and final stage of respiration.
3. Terminal oxidation - Electron transport system has a series of cytochromes and coenzymes that help in the transport of electrons. Cytochrome transport electron to oxygen which is the final acceptor of the electron. This oxygen is the one which constitutes the composition of glucose.

So, the correct option is ' oxygen'.