Biology Cell MDCAT 2019
PMDC Verified Question 115 of 143
The finger like infoldings which are formed by inner membrane of mitochondria are called:
A
Cristae
B
Ribosomes
C
Matrix
D
Porins
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Cristae
Concept: Maximizing surface area is a common biological strategy to increase the efficiency of membrane-bound chemical reactions.

Solution: The inner mitochondrial membrane folds inward to form cristae. These finger-like infoldings vastly increase the surface area available for housing the electron transport chain and ATP synthase complexes.

Distractor Autopsy: The matrix is the fluid inside. Porins are channel proteins on the outer membrane. Ribosomes are the protein factories.

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