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Function of Mitochondrial Cristae. Before we can explain the functioning of the crista (plural = cristae), we need to revisit what a mitochondrion does. The mitochondrion is the cellular organelle where cellular respiration takes place.Cellular respiration is the process that creates chemical energy in the form of ATP from simple food molecules.ristae are folds of the inner mitochondrial membrane. The electron transport chain and chemiosmosis takes place on this membrane as part of cellular respiration to create ATP and can be seen in the diagram:
The function of cristae is to expand the surface area of the mitochondria. The cristae are the inner foldings of membrane within the mitochondria. On the cristae, there are â¦ sites where cellular respiration occurs. Cellular respiration breaks down sugars into energy to be used in the cell.he cristae are the inner foldings of membrane within the mitochondria. On the cristae, there are â¦ sites where cellular respiration occurs. Cellular respiration breaks down sugars into energy to be used in the cell.