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Topic: Mitochondria, ribosomes, plastids, microbodies· Cell Structure and Function

Which of the following statements regarding mitochondria is incorrect ?

1. Outer membrane is permeable to monomers of carbohydrates, fats and proteins.

2. Enzymes of electron transport are embedded in outer membrane.

3. Inner membrane is convoluted with infoldings.

4. Mitochondrial matrix contains single circular DNA molecule and ribosomes.

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Answer: 2. Enzymes of electron transport are embedded in outer membrane.

The enzymes of the electron transport chain are in the inner mitochondrial membrane, not the outer. So statement 2 is incorrect.

The other statements are true: the outer membrane is porous, the inner membrane forms cristae, and the matrix has circular DNA and ribosomes.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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