Multiple Choice
Which of the following molecules are primarily used as energy sources by living organisms?
33. The Organic Chemistry of Metabolic Pathways
Intro to Metabolism
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Which of the following describes the role that enzymes play in the process of metabolism?
A
Enzymes provide energy for metabolic reactions by breaking down ATP.
B
Enzymes are permanently altered during metabolic reactions.
C
Enzymes are responsible for storing genetic information in metabolic pathways.
D
Enzymes act as catalysts to speed up metabolic reactions without being consumed.
Verified step by step guidance1
Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions in the body without being consumed in the process.
Recognize that enzymes do not provide energy themselves; instead, they lower the activation energy required for a reaction to occur, making the process faster.
Note that enzymes are not permanently altered during reactions. They can be reused multiple times for the same reaction type.
Clarify that enzymes do not store genetic information. This is the role of nucleic acids like DNA and RNA.
Conclude that the correct description of enzymes in metabolism is that they act as catalysts to speed up metabolic reactions without being consumed.
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