Cells use the hydrolysis of adenosine triphosphate (ATP) as...

Cells use the hydrolysis of adenosine triphosphate (ATP) as a source of energy (Figure 19.19$)$. The conversion of ATP to ADP has a standard free-energy change of $-30.5 \mathrm{~kJ} / \mathrm{mol}$. If all the free energy from the metabolism of glucose, $$ \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}(s)+6 \mathrm{O}_{2}(g) \longrightarrow 6 \mathrm{CO}_{2}(g)+6 \mathrm{H}_{2} \mathrm{O}(l) $$ goes into the conversion of ADP to ATP, how many moles of ATP can be produced for each mole of glucose?

Cells use the hydrolysis of adenosine triphosphate (ATP) as a source of energy (Figure 19.19$)$. The conversion of ATP to ADP has a standard free-energy change of $-30.5 \mathrm{~kJ} / \mathrm{mol}$. If all the free energy from the metabolism of glucose,
$$
\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}(s)+6 \mathrm{O}_{2}(g) \longrightarrow 6 \mathrm{CO}_{2}(g)+6 \mathrm{H}_{2} \mathrm{O}(l)
$$
goes into the conversion of ADP to ATP, how many moles of ATP can be produced for each mole of glucose?

Key Concepts

Cellular Respiration and Metabolic Energy Conversion

Cellular respiration is the metabolic process by which cells oxidize nutrients, such as glucose, to generate energy. The energy released during this process is converted into ATP, highlighting the importance of efficient energy transformation mechanisms that support various cellular activities.

Energy Coupling

Energy coupling refers to the process by which cells harness the energy released from exergonic reactions, like ATP hydrolysis, to drive endergonic reactions that require energy input. This coupling is critical for maintaining cellular functions and overall metabolic efficiency in living organisms.

Adenosine Triphosphate (ATP) as an Energy Currency

ATP serves as a universal energy currency in biological systems, storing and providing energy through the hydrolysis of its high-energy phosphate bonds. This molecule is central to energy transfer within cells, powering processes ranging from muscle contraction to active transport across membranes.

Gibbs Free Energy

Gibbs free energy is a thermodynamic quantity that indicates the amount of reversible work obtainable from a chemical reaction at constant temperature and pressure. Understanding the standard free-energy changes associated with reactions, such as the hydrolysis of ATP, is essential for quantifying energy transfers in biological processes.

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