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In the context of cellular energetics and Gibbs free energy, ATP hydrolysis is often coupled to drive endergonic reactions. Which set of components correctly makes up an ATP (adenosine triphosphate) molecule?
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1. Introduction to Biochemistry
Gibbs Free Energy
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In living organisms, what is the primary function of ATP (adenosine triphosphate)?
A
To provide genetic information as the stable hereditary material in cells
B
To act as the primary long-term energy storage molecule in animals, stored in adipose tissue
C
To function as the enzyme that directly catalyzes glycolysis and the citric acid cycle
D
To serve as the main energy currency by coupling exergonic reactions (ATP hydrolysis) to drive endergonic cellular processes
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Understand that ATP (adenosine triphosphate) is a molecule used by cells to store and transfer energy.
Recognize that ATP contains high-energy phosphate bonds, especially the bond between the second and third phosphate groups, which can be broken to release energy.
Know that ATP hydrolysis (breaking down ATP into ADP and inorganic phosphate) is an exergonic reaction, meaning it releases energy.
Learn that this released energy is used to drive endergonic (energy-requiring) cellular processes, such as muscle contraction, active transport, and biosynthesis.
Conclude that ATP acts as the main energy currency in cells by coupling energy-releasing reactions to energy-consuming reactions, enabling the cell to perform work efficiently.
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