Ch. 7 - Enzyme Inhibition and Regulation WorksheetSee all chapters
All Chapters
Ch. 1 - Introduction to Biochemistry
Ch. 2 - Water
Ch. 3 - Amino Acids
Ch. 4 - Protein Structure
Ch. 5 - Protein Techniques
Ch. 6 - Enzymes and Enzyme Kinetics
Ch. 7 - Enzyme Inhibition and Regulation
Ch. 8 - Protein Function
Ch. 9 - Carbohydrates
Ch. 10 - Lipids
Ch. 11 - Biological Membranes and Transport
Ch. 12 - Biosignaling
Clutch Review 1: Nucleic Acids, Lipids, & Membranes
Clutch Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway
Clutch Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism
Clutch Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Sections
Enzyme Inhibition
Irreversible Inhibition
Reversible Inhibition
Inhibition Constant
Degree of Inhibition
Apparent Km and Vmax
Inhibition Effects on Reaction Rate
Competitive Inhibition
Uncompetitive Inhibition
Mixed Inhibition
Noncompetitive Inhibition
Recap of Reversible Inhibition
Allosteric Regulation
Allosteric Kinetics
Allosteric Enzyme Conformations
Allosteric Effectors
Concerted (MWC) Model
Sequential (KNF) Model
Negative Feedback
Positive Feedback
Post Translational Modification
Ubiquitination
Phosphorylation
Zymogens

Concept #1: Negative Feedback

Example #1: Feedback Regulation in Glycolysis

Practice: The scheme below represents a hypothetical metabolic pathway for the synthesis of compound Y. The pathway is regulated by feedback inhibition. If S → T is the rate-limiting step, circle what the most likely inhibitor is and indicate with an arrow where the inhibition most likely occurs:

S → T → U → V → W → X → Y

Practice: A metabolic pathway proceeds according to the following scheme: R → S → T → U → V → W. A regulatory enzyme, X, catalyzes the first reaction in the pathway. Which of the following is most likely correct for this pathway?

Practice: Which of the following is TRUE about feedback inhibition?