Multiple Choice
Which substances are responsible for accelerating chemical reactions in cells?
15. Chemical Kinetics
Catalyst
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Which type of molecules primarily catalyze chemical reactions in biological systems?
A
Carbohydrates
B
Enzymes
C
Nucleic acids
D
Lipids
Verified step by step guidance1
Begin by understanding the role of catalysts in biological systems. Catalysts are substances that increase the rate of chemical reactions without being consumed in the process.
Recognize that in biological systems, enzymes are the primary catalysts. Enzymes are proteins that facilitate specific biochemical reactions, often with high specificity and efficiency.
Consider the structure and function of enzymes. They are composed of amino acids and have unique three-dimensional structures that allow them to bind to substrates and lower the activation energy of reactions.
Differentiate enzymes from other biological molecules such as carbohydrates, nucleic acids, and lipids. While these molecules have important roles in biological systems, they do not primarily function as catalysts.
Conclude that enzymes are the correct answer because they are specialized proteins that catalyze chemical reactions in biological systems, unlike carbohydrates, nucleic acids, or lipids.
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