Multiple Choice
In the context of chemical reactions, the breakdown of starch by digestive enzymes is best classified as which type of reaction?
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3. Energy & Cell Processes
Chemical Reactions
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An exergonic (spontaneous) reaction is a chemical reaction that __________.
A
occurs only when an enzyme or other catalyst is present
B
cannot occur outside of a living cell
C
is common in anabolic pathways
D
leads to a decrease in the entropy of the universe
E
releases energy when proceeding in the forward direction
Verified step by step guidance1
Understand the definition of an exergonic reaction: An exergonic reaction is a chemical reaction where the change in the free energy is negative, indicating that energy is released during the reaction.
Recognize that exergonic reactions are spontaneous, meaning they can occur without the input of additional energy.
Consider the role of enzymes: While enzymes can speed up reactions, exergonic reactions do not require them to occur; they simply lower the activation energy.
Analyze the options: An exergonic reaction does not need to occur within a living cell, is not typically associated with anabolic pathways (which are endergonic), and does not decrease the entropy of the universe.
Conclude that the defining characteristic of an exergonic reaction is that it releases energy when proceeding in the forward direction, aligning with the correct answer provided.
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