Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

7. Enzyme Inhibition and Regulation

Enzyme Inhibition

Biochemistry

7. Enzyme Inhibition and Regulation

Enzyme Inhibition

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Multiple Choice

Which of the following mechanisms does NOT regulate the activity of an enzyme?

Denaturation by extreme heat

Covalent modification

Allosteric modulation

Competitive inhibition

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Verified step by step guidance

Understand the question: The problem is asking which mechanism does NOT regulate enzyme activity. To solve this, we need to analyze each option and determine whether it is a regulatory mechanism or not.

Step 1: Recall the concept of enzyme regulation. Enzymes are regulated through mechanisms such as covalent modification (e.g., phosphorylation), allosteric modulation (binding of molecules at sites other than the active site), and competitive inhibition (binding of inhibitors at the active site). These mechanisms alter enzyme activity in a controlled manner.

Step 2: Analyze 'Denaturation by extreme heat.' Denaturation refers to the irreversible loss of enzyme structure and function due to factors like extreme heat. This is not a regulatory mechanism because it permanently damages the enzyme rather than modulating its activity.

Step 3: Analyze 'Covalent modification.' Covalent modification involves chemical changes to the enzyme, such as phosphorylation or acetylation, which can activate or deactivate the enzyme. This is a regulatory mechanism.

Step 4: Analyze 'Allosteric modulation.' Allosteric modulation occurs when molecules bind to sites other than the active site, causing conformational changes that regulate enzyme activity. This is a regulatory mechanism.

Step 5: Analyze 'Competitive inhibition.' Competitive inhibition occurs when a molecule competes with the substrate for binding at the active site, temporarily reducing enzyme activity. This is a regulatory mechanism.