BIOCHEMISTRY
ENZYMES AND METABOLISM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Its hydrolysis provides an input of free energy for exergonic reactions.
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It provides energy coupling between exergonic and endergonic reactions.
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Its terminal phosphate group contains a strong covalent bond that when hydrolyzed releases free energy.
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Its terminal phosphate bond has higher energy than the other two.
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Detailed explanation-1: -ATP provides the energy for both energy-consuming endergonic reactions and energy-releasing exergonic reactions, which require a small input of activation energy. When the chemical bonds within ATP are broken, energy is released and can be harnessed for cellular work.
Detailed explanation-2: -The exergonic process is the specific reaction in which energy is released by the system at the end of the reaction. This is why in the exergonic reactions, ATP is produced by the reaction at the end. The endergonic process is the reaction in which the ATP molecule is used for the specific reaction.
Detailed explanation-3: -ATP transfers a phosphate group to the reacting molecule of the endergonic reaction. The energy from the phosphate group drives the endergonic process. This way, ATP transfers energy from an exergonic to an endergonic reaction.
Detailed explanation-4: -Question 1: What’s the role of ATP in energy coupling? Answer: ATP is the molecule whose burst of energy is used to couple an exergonic reaction to power an endergonic reaction in energy coupling. ATP coupling provides that endergonic reaction with the potential to manifest now.
Detailed explanation-5: -ATP acts as a cell’s storehouse of energy. It enables cells to store energy safely in small packets and release the energy for use only as and when needed. In other words, ATP serves to close the gap between energy-releasing reactions such as food breakdown and energy-requiring actions such as synthesis.