AP Biology: Enzyme Activity &
Kinetics Notes (Inhibition & Factors)
+ Practice Q&A
TABLE OF CONTENTS
Introduction
Structure of Enzymes
Lock-and-Key vs. Induced Fit Models
Factors Affecting Enzyme Activity
Enzyme Inhibition(Advanced Concept)
Importance of Enzymes
Common Student Mistakes
Practice Questions and Answers
, Introduction
Enzymes are specialized proteins that act as biological catalysts. They accelerate chemical
reactions within living organisms without being consumed or permanently altered in the process.
Without enzymes, vital metabolic reactions would occur far too slowly to sustain life. They
ensure that cellular processes happen instantly at normal body temperatures.
Structure of Enzymes
● Protein Nature: Most enzymes are globular proteins made of long chains of amino acids
folded into specific three-dimensional shapes.
● The Active Site: A unique, highly specific pocket or groove on the surface of the
enzyme where the catalytic reaction takes place.
● The Substrate: The specific reactant molecule that an enzyme binds to and acts upon.
● Enzyme-Substrate (ES) Complex: The temporary structure formed when the substrate
binds perfectly into the enzyme’s active site.
Kinetics Notes (Inhibition & Factors)
+ Practice Q&A
TABLE OF CONTENTS
Introduction
Structure of Enzymes
Lock-and-Key vs. Induced Fit Models
Factors Affecting Enzyme Activity
Enzyme Inhibition(Advanced Concept)
Importance of Enzymes
Common Student Mistakes
Practice Questions and Answers
, Introduction
Enzymes are specialized proteins that act as biological catalysts. They accelerate chemical
reactions within living organisms without being consumed or permanently altered in the process.
Without enzymes, vital metabolic reactions would occur far too slowly to sustain life. They
ensure that cellular processes happen instantly at normal body temperatures.
Structure of Enzymes
● Protein Nature: Most enzymes are globular proteins made of long chains of amino acids
folded into specific three-dimensional shapes.
● The Active Site: A unique, highly specific pocket or groove on the surface of the
enzyme where the catalytic reaction takes place.
● The Substrate: The specific reactant molecule that an enzyme binds to and acts upon.
● Enzyme-Substrate (ES) Complex: The temporary structure formed when the substrate
binds perfectly into the enzyme’s active site.
