Question

Which of these statements about ATP is true?

The bond joining ADP and the third phosphate is a high-energy bond.
The formation of ATP is coupled to energy-liberating reactions.
The conversion of ATP to ADP and Pi provides energy for biosynthesis, cell movement, and other cellular processes that require energy.
ATP is the "universal energy carrier" of cells.

Answer 1

The true statement about ATP is that the bond joining ADP and the third phosphate is a high-energy bond. ATP serves as the "universal energy carrier" in cells, with high-energy phosphoanhydride bonds that release energy when hydrolyzed.

Step-by-step explanation:

The correct statement about adenosine triphosphate (ATP) is: The bond joining ADP and the third phosphate is a high-energy bond. ATP is considered the "universal energy carrier" within cells and plays a crucial role in various cellular processes. ATP is composed of adenosine bound to three phosphate groups. The phosphoanhydride bonds that link these phosphate groups, especially the bond between the second and third (beta and gamma) phosphates, are high-energy because they release a significant amount of energy when broken, which is used by the cell for various functions (like muscle contraction, transportation across cell membrane, etc.). This process, known as ATP hydrolysis, can be represented by the reaction ATP + H₂O → ADP + Pi + free energy. Overall, ATP molecules are a nexus of energy transfer, continuously undergoing the process of energy storage when formed and energy release when consumed.