Which is a type of cellular work powered by ATP?

Which is a type of cellular work powered by ATP?

• A. Gravitational work
• B. Nuclear work
• C. Chemical work
• D. Thermal work

Answer: (C)

ATP energy drives endergonic chemical reactions in the cell, which is chemical work. When ATP is hydrolyzed to ADP and Pi, the released energy is used to power biosynthetic processes, activate substrates (such as by phosphorylation), and push reactions that would not occur spontaneously. This coupling keeps metabolic pathways moving and enables synthesis of macromolecules and other essential compounds. The other options don’t represent cellular processes typically powered directly by ATP: gravitational work involves macroscopic forces outside of metabolism; nuclear work isn’t a standard cellular energy-transduction category; and thermal work isn’t the term used for how cells utilize ATP.

ATP energy drives endergonic chemical reactions in the cell, which is chemical work. When ATP is hydrolyzed to ADP and Pi, the released energy is used to power biosynthetic processes, activate substrates (such as by phosphorylation), and push reactions that would not occur spontaneously. This coupling keeps metabolic pathways moving and enables synthesis of macromolecules and other essential compounds. The other options don’t represent cellular processes typically powered directly by ATP: gravitational work involves macroscopic forces outside of metabolism; nuclear work isn’t a standard cellular energy-transduction category; and thermal work isn’t the term used for how cells utilize ATP.