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MHT CET 202622 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
22 April
Shift
Morning Shift
Subject
Biology
Chapter
Respiration in Plants

MHT CET 2026 · 22 April · Morning Shift · Biology · Respiration in Plants

The protons released during the oxidation of NADH+H^+ and FAD H_2...

The protons released during the oxidation of NADH+H+NADH+H^+ and FADFADH_2inmitochondriafollowthepathsgivenbelowEXCEPT:in mitochondria follow the paths given below EXCEPT:

Options

  1. AProtons are released into intermembrane space.
  2. BThey are channelized into the inner chamber by F0\text{F}_0 part of oxysome present in the inner membrane.
  3. CThese protons react with reduced molecular oxygen to form water molecule.
  4. 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^+andFADH2and FADH_2 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 F_0 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 to form metabolic water.

The metabolic water formed is generally utilized within the cell for various biochemical processes and does not specifically evaporate through the stomata as its primary fate. Therefore, the statement about the water molecule evaporating through the stomata is the exception.

Answer: This water molecule evaporates through the stomata.
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