MCQ
The figure below shows the structure of a mitochondrion with its four parts labelled $(A), (B), (C)$ and $(D).$

Select the part correctly matched with its function.

  • A
    $Part (D):$ Outer membrane - Gives rise to inner membrane by splitting.
  • $Part (B):$ Inner membrane - Forms infoldings called cristae.
  • C
    $Part (C):$ Cristae - Possess single circular $DNA$ molecule and ribosomes.
  • D
    $Part (A):$ Matrix - Major site for respiratory chain enzymes.

Answer

Correct option: B.
$Part (B):$ Inner membrane - Forms infoldings called cristae.
b
The mitochondrial inner membrane forms infoldings known as cristae, which allow greater surface area for protein such as cytochrome to function properly and efficiently.

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