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

6. Enzymes and Enzyme Kinetics

Enzymes

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzymes

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Multiple Choice

How many times can a single sucrase enzyme molecule catalyze the hydrolysis of sucrose?

Only once, after which the enzyme is consumed

Twice, after which it must be regenerated

Ten times before it becomes inactive

An unlimited number of times, as long as the enzyme is not denatured

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Verified step by step guidance

Understand the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions without being consumed or permanently altered in the process. This means they can catalyze reactions repeatedly as long as their structure remains intact.

Focus on sucrase: Sucrase is an enzyme that specifically catalyzes the hydrolysis of sucrose into glucose and fructose. It binds to sucrose at its active site, facilitating the reaction.

Clarify enzyme reuse: After catalyzing the reaction, sucrase releases the products (glucose and fructose) and is free to bind to another sucrose molecule. This cycle can repeat indefinitely as long as the enzyme remains functional.

Consider enzyme denaturation: Enzymes can lose their functionality if they are denatured, which occurs due to factors like extreme pH, high temperature, or chemical inhibitors. As long as sucrase is not denatured, it can catalyze the reaction an unlimited number of times.

Conclude the concept: The correct answer is that sucrase can catalyze the hydrolysis of sucrose an unlimited number of times, provided the enzyme remains intact and functional.