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Ch.12 Food as Fuel–An Overview of Metabolism
Chapter 8, Problem 11a

Identify the metabolic nucleotide described by the following:


a. exchanges energy when a phosphate bond is hydrolyzed

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1
Identify the metabolic nucleotide that is commonly involved in energy transfer within cells.
Consider the role of this nucleotide in cellular processes, particularly in the context of energy exchange.
Recall that this nucleotide is known for its ability to store and release energy through the hydrolysis of its phosphate bonds.
Recognize that the hydrolysis of a phosphate bond in this nucleotide releases energy that can be used by the cell for various functions.
Conclude that the nucleotide in question is adenosine triphosphate (ATP), which is known for its role in energy transfer through the hydrolysis of its phosphate bonds.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Phosphate Bond Hydrolysis

Phosphate bond hydrolysis refers to the chemical reaction where a phosphate group is removed from a nucleotide, releasing energy. This process is crucial in cellular metabolism, as it provides the energy needed for various biochemical reactions. The breaking of this bond typically occurs in nucleotides like ATP, which is often referred to as the energy currency of the cell.
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Acidic Hydrolysis Concept 1

Nucleotide Structure

Nucleotides are the building blocks of nucleic acids and consist of three components: a nitrogenous base, a five-carbon sugar, and one or more phosphate groups. The presence of phosphate groups is essential for the nucleotide's role in energy transfer and storage. Understanding the structure of nucleotides helps in comprehending how they function in metabolic processes.
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ATP (Adenosine Triphosphate)

ATP, or adenosine triphosphate, is a nucleotide that plays a central role in energy transfer within cells. It contains three phosphate groups, and when one of these phosphate bonds is hydrolyzed, it releases energy that can be used for cellular activities. ATP is vital for processes such as muscle contraction, nerve impulse propagation, and biochemical synthesis.
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Adenosine Triphosphate (ATP) Example 2