The infoldings of the inner mitochondrial membrane are called: MCQ with Answer and Explanation

The infoldings of the inner mitochondrial membrane are called:
A. Cisternae
B. Cristae
C. Grana
D. Thylakoids
Answer: Option B
Solution (By JKSSB Mock Tests)
Cristae are the numerous infoldings of the inner mitochondrial membrane that increase surface area for oxidative phosphorylation and ATP synthesis. They contain ATP synthase complexes. Thylakoids are membrane structures in chloroplasts; grana are stacks of thylakoids. Cisternae are flattened membrane sacs of ER and Golgi. Cristae give the inner membrane its characteristic folded appearance.

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