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

Which of the following statements is true regarding sucrase?

Sucrase is a protease that digests peptide bonds in proteins.

Sucrase requires ATP hydrolysis to function.

Sucrase is responsible for breaking down lactose into glucose and galactose.

Sucrase catalyzes the hydrolysis of sucrose into glucose and fructose.

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Verified step by step guidance

Step 1: Begin by understanding the role of sucrase. Sucrase is an enzyme that catalyzes the hydrolysis of sucrose, a disaccharide, into its monosaccharide components: glucose and fructose.

Step 2: Evaluate the first statement: 'Sucrase is a protease that digests peptide bonds in proteins.' Proteases are enzymes that break down proteins, not carbohydrates. Sucrase specifically targets sucrose, a carbohydrate, so this statement is false.

Step 3: Evaluate the second statement: 'Sucrase requires ATP hydrolysis to function.' Most enzymes, including sucrase, do not require ATP hydrolysis to catalyze their reactions. Sucrase works by lowering the activation energy of the reaction without needing ATP, so this statement is false.

Step 4: Evaluate the third statement: 'Sucrase is responsible for breaking down lactose into glucose and galactose.' Lactose is broken down by lactase, not sucrase. Sucrase specifically hydrolyzes sucrose, so this statement is false.

Step 5: Evaluate the fourth statement: 'Sucrase catalyzes the hydrolysis of sucrose into glucose and fructose.' This is the correct statement because it accurately describes the function of sucrase in carbohydrate metabolism.