Multiple Choice
Which enzyme works in the small intestine to cleave the peptide bonds next to specific amino acids?
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7. Energy and Metabolism
Enzymes
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Which of the following best describes enzymes?
A
Nucleic acids that carry genetic information
B
Lipids that store energy for cellular processes
C
Carbohydrates that provide structural support to cells
D
Proteins that act as biological catalysts to speed up chemical reactions
Verified step by step guidance1
Understand the role of enzymes in biological systems: Enzymes are specialized molecules that speed up chemical reactions without being consumed in the process. This property makes them biological catalysts.
Identify the molecular composition of enzymes: Enzymes are primarily composed of proteins, which are made up of chains of amino acids folded into specific three-dimensional structures.
Differentiate enzymes from other macromolecules: Nucleic acids (e.g., DNA and RNA) carry genetic information, lipids store energy, and carbohydrates provide structural support. Enzymes, however, are proteins with catalytic functions.
Recognize the importance of enzyme specificity: Enzymes are highly specific to the reactions they catalyze, meaning they bind to particular substrates and facilitate specific chemical transformations.
Conclude that enzymes are proteins acting as biological catalysts, which distinguishes them from other macromolecules like nucleic acids, lipids, and carbohydrates.
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