Multiple Choice
In a typical enzyme-catalyzed reaction where the enzyme remains chemically unchanged, how many times can a single enzyme molecule be used to catalyze the conversion of substrate to product?
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6. Enzymes and Enzyme Kinetics
Enzymes
Multiple Choice
In the context of enzymes, which term best describes a protein that speeds up chemical reactions by lowering the activation energy?
A
Substrate
B
Denaturant
C
Enzyme (biological catalyst)
D
Cofactor
Verified step by step guidance1
Understand the role of proteins in biochemical reactions: Proteins can have various functions, including structural roles, signaling, and catalysis.
Define the term 'substrate': It is the molecule upon which an enzyme acts during a chemical reaction.
Define the term 'denaturant': It is a chemical agent that disrupts the native structure of proteins, often leading to loss of function.
Define the term 'cofactor': It is a non-protein chemical compound or metallic ion required for an enzyme's activity.
Recognize that an 'enzyme' is a protein that acts as a biological catalyst by speeding up chemical reactions through lowering the activation energy barrier, making it the correct term for the description.
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