NEET BIOLOGY

Detailed explanation-1: -Mitochondria are involved in different cellular functions, but they are essentially responsible for cellular ATP production through the so-called oxidative phosphorylation (OXPHOS). This process occurs in the inner mitochondrial membrane (IMM) in specific dynamic membrane invaginations called cristae.

Detailed explanation-2: -Cristae are located on the inner membrane of mitochondria and mitochondria are located in the cell cytoplasm, not the nucleus.

Detailed explanation-3: -A crista (/ˈkrɪstə/; plural cristae) is a fold in the inner membrane of a mitochondrion. The name is from the Latin for crest or plume, and it gives the inner membrane its characteristic wrinkled shape, providing a large amount of surface area for chemical reactions to occur on.

Detailed explanation-4: -The cristae define the third mitochondrial compartment, the crista lumen. The crista membranes contain most, if not all, of the fully assembled complexes of the electron transport chain and the ATP synthase (Fig. 2). The crista lumen contains large amounts of the small soluble electron carrier protein cytochrome c.

Detailed explanation-5: -Cristae are infoldings that are found in the inner membrane of mitochondria.