Question

Read the assertion and reason carefully to mark the correct option in question.

Assertion: The inner membrance of mitochondria contains systems involving electron transport.

Reason: The mitochondrial matrix contains enzymes of Krebs' cycle.

• A. If assertion is true but the reason is false.
• B. If both assertion and reason are true and the reason is the correct explanation of the assertion.
• C. If both assertion and reason are false.
• D. If both assertion and reason are true but the reason is not the correct explanation of the assertion.

Answer 1

The correct option is D If both assertion and reason are true but the reason is not the correct explanation of the assertion.

Assertion - reason relation

The electron transport chain is a series of complexes made up of proteins and organic molecules in the inner membrane of the mitochondria.

The inner mitochondrial membrane has five complexes out of which four complexes are involved with transfer of electrons released from $NADH+H^{+}$ and $FAD{H}_2$ and complex V is involved with the synthesis of ATP.

All enzymes of the TCA cycle are located in the mitochondrial matrix except succinate dehydrogenase which is located in the inner mitochondrial membrane in eukaryotes and the cytosol in prokaryotes.

Hence, assertion and reason both are true but reason is not is the correct explanation for the assertion.