Question

Amount of energy liberated during hydrolysis of ATP to ADP is

• A. $686000$ $cal/mol$
• B. $73000$ $cal/mol$
• C. $8000$ $cal/mol$
• D. $7300$ $cal/mol$

Answer 1

The correct option is D $7300$ $cal/mol$

ATP is known as energy currency of the cell and it is a nucleotide formed by combination of adenine as nitrogenous base, ribose sugar and triphosphate. It is found in free cells which breaks to form energy by breaking its high energy phosphate bonds. The high energy phosphate bonds breaks to form ADP and AMP. It is a hydrolysis reaction which occurs at extreme pH. It dephosphorylates to provide energy for metabolic function.

ATP has three phosphate out of which one is directly attached to the ribose with phosphate ester bond and it is low energy bond. The bond between two phosphate groups is a phosphoanhydride bond which is considered as high energy bond. So ATP has only two high energy bond phosphoanhydride bond. The energy released is 7300 cal/mol.

So, the correct answer is option D.