Podcast
Questions and Answers
What is the primary role of enzymes in biological reactions?
How does the induced fit model differ from the lock-and-key model?
What happens to enzymes at temperatures above their optimum level?
What effect does pH have on enzyme activity?
Signup and view all the answers
Which statement best describes how temperature affects enzyme-substrate complexes?
Signup and view all the answers
What happens when an enzyme denatures?
Signup and view all the answers
Which factor is NOT mentioned as affecting enzyme activity?
Signup and view all the answers
Why are the effects of low temperatures on enzymes typically reversible?
Signup and view all the answers
What is the primary effect of increasing substrate concentration in the presence of a competitive inhibitor?
Signup and view all the answers
How do non-competitive inhibitors affect the active site of an enzyme?
Signup and view all the answers
Which description accurately reflects the behavior of a non-competitive inhibitor?
Signup and view all the answers
What happens to the reaction rate in the presence of a non-competitive inhibitor when substrate concentration is increased?
Signup and view all the answers
In what way does increasing enzyme concentration influence the formation of enzyme-substrate complexes?
Signup and view all the answers
Study Notes
Enzyme Function
- Enzymes are proteins with specific tertiary structures
- Active site complements a specific substrate
- Biological catalysts lowering activation energy
- Intracellular or extracellular
- Determine cellular and organism structure and function
Induced Fit Model
- Replaced the lock-and-key model
- Lock-and-key: substrates and enzymes have exact complementary shapes; active sites don't change shape
- Induced fit: active site not fully complementary; slightly changes shape when substrate binds, forming enzyme-substrate complex; stresses/forms bonds in substrate, lowering activation energy
Temperature Effects
- Increased temperature: more kinetic energy, more successful collisions, more enzyme-substrate complexes form
- High temperature: enzyme denatures; breaks hydrogen/ionic bonds between amino acid R groups; active site shape changes preventing enzyme-substrate complex formation
- Low temperature: reversible; high temperature effects are not reversible
pH Effects
- Enzymes denature above/below optimum pH
- H+ (acidic) or OH- (alkali) ions interfere with hydrogen/ionic bonds in amino acid R groups; active site shape changes
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the essential concepts of enzyme function, focusing on their specific structures and catalytic abilities. Additionally, it explores the Induced Fit Model and temperature effects on enzyme activity. Test your understanding of these vital biological processes.
