MHT CET Medical202622 April 2026Morning ShiftBiologyRespiration in PlantsActual
The protons released during the oxidation of NADH+H ^+ and FAD H₂ in mitochondria follow the paths given below EXCEPT:
Options
- AProtons are released into intermembrane space.
- BThey are channelized into the inner chamber by F ₀ part of oxysome present in the inner membrane.
- CThese protons react with reduced molecular oxygen to form water molecule.
- DThis water molecule evaporates through the stomata.
Correct answer
D. This water molecule evaporates through the stomata.
Step-by-step solution
During the electron transport chain in mitochondria, the oxidation of NADH+H ^+ and FADH₂ releases protons and electrons. The protons are pumped from the mitochondrial matrix into the intermembrane space, creating a proton gradient. These protons then move back into the inner chamber (matrix) through the F₀ channel of the ATP synthase (oxysome) present in the inner mitochondrial membrane, driving ATP synthesis. In the matrix, the protons combine with the terminal electron acceptor, molecular oxygen, and electrons t