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Inner mitochondrial membrane folds
publish date: 2026/06/16 20:56:46.662071 UTC
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The inner membranes of the mitochondria have many inwardly directed folds that extend into a semifluid matrix. What are these folds called?
Correct Answer
cristae
Explanation
The inwardly directed folds of the inner mitochondrial membrane are called cristae. They extend into a semifluid matrix and greatly increase the surface area available for the energy-transfer enzyme systems that manufacture ATP. It is along the cristae and in the matrix where cellular respiration reactions occur.
Reference
Biology: A Self-Teaching Guide