NTA Abhyas NEET2020BotanyRespiration in PlantsPractice
Which of the following is correct regarding electron transport system of respiration ?
Options
- ANADH is directly oxidised by complex IV.
- BComplex V is a mobile electron carrier.
- CComplex IV causes the reduction of molecular oxygen.
- DComplex II contains two copper centres.
Correct answer
C. Complex IV causes the reduction of molecular oxygen.
Step-by-step solution
Energy obtained through the transfer of electrons (blue arrows) down the ETC is used to pump protons (red arrows) from the mitochondrial matrix into the intermembrane space, creating an electrochemical proton gradient across the mitochondrial inner membrane (IMM) called ΔΨ. This electrochemical proton gradient allows ATP synthase (ATP-ase) to use the flow of H+ through the enzyme back into the matrix to generate ATP from adenosine diphosphate (ADP) and inorganic phosphate. Complex I (NADH coenzyme Q reductase; labe