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

If you add sucrose to a reaction mixture containing catalase when testing for reactivity, what is the most likely outcome?

Oxygen gas will be produced from the breakdown of sucrose.

There will be no reaction because sucrose is not a substrate for catalase.

Catalase will hydrolyze sucrose into glucose and fructose.

The reaction rate will increase due to competitive inhibition.

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Verified step by step guidance

Step 1: Understand the role of catalase. Catalase is an enzyme that specifically catalyzes the decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen gas (O₂). It does not act on other substrates like sucrose.

Step 2: Analyze the substrate specificity of enzymes. Enzymes are highly specific to their substrates due to the precise fit required between the enzyme's active site and the substrate. Sucrose is a disaccharide composed of glucose and fructose, but it is not a substrate for catalase.

Step 3: Evaluate the possibility of competitive inhibition. Competitive inhibition occurs when a molecule similar in structure to the substrate competes for binding at the enzyme's active site. Since sucrose does not resemble hydrogen peroxide structurally, it is unlikely to act as a competitive inhibitor for catalase.

Step 4: Consider the chemical reaction. If sucrose is added to a reaction mixture containing catalase, no reaction will occur because catalase cannot hydrolyze sucrose or break it down into glucose and fructose. Catalase is specific to hydrogen peroxide.

Step 5: Conclude the outcome. The most likely outcome is that there will be no reaction because sucrose is not a substrate for catalase, and it does not interfere with the enzyme's activity on hydrogen peroxide.