Matrix is the term for the fluid-filled interior of what structure, where most of the cell’s atp is made?

• Correct Answer: enzyme
• nucleus
• Golgi apparatus
• mitochondria

Explanation: As the Figure below (a) and (b) shows, a mitochondrion has two phospholipids membranes. The smooth outer membrane separates the mitochondrion from the cytosol. The inner membrane has many folds, called cristae . These cristae greatly increase the membrane surface area for integral proteins. Many proteins involved in cellular respiration are embedded in this inner membrane. The greater surface area allows more proteins to be located there, resulting in more cellular respiration reactions, and more ATP synthesis. ATP is produced by the enzyme ATP synthase, which is a membrane protein of the mitochondria inner membrane. The fluid-filled inside of the mitochondrian, called matrix , is where most of the cell’s ATP is made.

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