Inorganic Phosphate Translocase

The video tutorial explains the role of phosphate translocase and adenine nucleotide translocase in ATP synthesis within mitochondria. It describes the transport of phosphate into the mitochondrial matrix, necessary for ATP production, and the concept of energy coupling, where phosphate transport is coupled with proton transfer to make the process exergonic. The tutorial also distinguishes between coupling and uncoupling proteins, highlighting how uncoupling proteins move hydrogen ions without ATP synthesis. Finally, it outlines the pathway of phosphate from the cytosol to the matrix, emphasizing the importance of these translocases in ATP synthesis.

What is the primary role of the phosphate translocase in the mitochondria?

• To synthesize ATP directly

• To break down ADP

• To transport phosphate into the matrix

• To transport ATP out of the matrix

How does energy coupling facilitate phosphate movement into the mitochondrial matrix?

• By breaking down glucose

• By using ATP directly

• By coupling with hydrogen ion movement

• By using a separate energy source

What distinguishes an uncoupling protein from ATP synthase?

• It breaks down ATP

• It moves hydrogen ions without coupling to ATP synthesis

• It synthesizes ATP

• It transports ADP

What is the role of the inorganic phosphate translocase in the outer mitochondrial membrane?

• To transport ATP out of the mitochondria

• To transport phosphate from the cytosol to the inner membrane space

• To break down phosphate

• To synthesize ATP

Why is it important to transport ATP out of the mitochondrial matrix?

• To prevent ATP accumulation in the matrix

• Because ATP is only used within the matrix

• To convert ATP back to ADP

• To ensure ATP is available for cellular processes outside the matrix