Multiple choice

ATP is produced in mitochondria as a result of oxidative phosphorylation and transferred to the cytoplasm but inner membrane of mitochondria is impenetrable to charged species. Two transport systems are used for transferring Pi and ADP into the matrix. ATP is transferred to the cytosol.

Which of the following is the first transport system?

  1. Phosphate translocase

  2. Adenine nucleotide translocase

  3. Malate synthase

  4. Malate dehydrogenase

  5. Phosphopentose isomerase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adenine nucleotide translocase is the first transport system. It is combined in inner mitochondrial membrane. It is a membrane protein (antiporter) which is used for carrying Pi and ADP into matrix and ATP into cytosol.

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