The infoldings of the inner mitochondrial membrane are called
Correct answer: A. cristae
- A. cristae
- B. matrix
- C. thylakoids
- D. grana
Explanation
Cristae greatly increase the area available for the electron transport chain and the ATP synthase particles, so cells with a high energy demand such as cardiac muscle have mitochondria packed with them. The matrix is the fluid enclosed by that membrane and holds the Krebs cycle enzymes. Thylakoids and grana are the equivalent membrane stacks inside a chloroplast, not a mitochondrion.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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