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What is the primary energy molecule used in active transport within cells?
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7. Energy and Metabolism
ATP
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Where is the energy stored in an ATP molecule?
A
In the hydrogen atoms
B
In the phosphate bonds
C
In the adenine base
D
In the ribose sugar
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Understand the structure of an ATP (adenosine triphosphate) molecule, which consists of three main components: an adenine base, a ribose sugar, and three phosphate groups.
Recognize that the energy in an ATP molecule is stored in the bonds between the phosphate groups, specifically the high-energy bonds between the second and third phosphate groups.
Learn that when ATP is hydrolyzed (a phosphate group is removed), it releases energy that can be used by the cell for various processes.
Note that the breaking of the bond between the second and third phosphate group converts ATP into ADP (adenosine diphosphate) and an inorganic phosphate, releasing energy.
Remember that the energy stored in the phosphate bonds of ATP is crucial for cellular activities, such as muscle contraction, active transport, and biochemical reactions.
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