Question

ATP is known as energy currency of a cell. ATP is synthesized from ADP and Pi. The reaction is catalyzed by an enzyme called as ATP synthase. When the enzyme and substrate (ADP) are distant inside the cell, the reaction cannot take place spontaneously. Which of the following statements best explains the cause for the ATP synthase and ADP to interact?

• A. Electronegativity of ADP attracts ATP synthase
• B. ADP will be actively pumped to ATP synthase
• C. Random movements will bring ADP to ATP synthase
• D. ADP and ATP synthase always remain bound to oxysomes

Answer 1

The correct option is C Random movements will bring ADP to ATP synthase

There are intermembranous proteins which allow the ADP and ATP to pass through them freely. The ATP synthase molecule required the ADP and inorganic phosphate in order to produce the ATP after the process of chemiosmosis coupling. These ADP molecules are made available to the ATP synthase by the random movements.

Thus, the correct answer is option C.