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Biology Question 96 – NEET-UG 2026

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Mitochondrial inner membrane encloses ______.

Recall the basic structure of a mitochondrion, including its membranes and compartments.

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Ninja Strategy•Biological Context Elimination

Quickly eliminate options that are clearly not related to cellular organelles or their internal compartments, leaving the correct biological term.

Step 1: Recall Mitochondrial Structure✦ Active

Mitochondria are double-membraned organelles. The outer membrane is smooth, while the inner membrane is folded into cristae.

💡 Teacher's Secret Hint

Remember that the folding of the inner membrane increases its surface area for cellular respiration.

Step 2: Identify the Compartments○ Expand

The space between the outer and inner membranes is called the intermembrane space. The space enclosed by the inner mitochondrial membrane is known as the mitochondrial matrix.

Step 3: Determine the Enclosed Substance○ Expand

Based on the structure, the mitochondrial inner membrane encloses the mitochondrial matrix.

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