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 incorrect regarding catalytic enzymes?

Enzymes are not consumed during the reactions they catalyze.

Enzymes increase the activation energy required for a reaction.

Enzymes can be regulated by inhibitors and activators.

Enzymes exhibit specificity for their substrates.

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Verified step by step guidance

Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up reactions by lowering the activation energy required for the reaction to proceed. They are not consumed during the reaction and remain unchanged after the reaction is complete.

Analyze the statement 'Enzymes increase the activation energy required for a reaction': This statement is incorrect because enzymes actually decrease the activation energy, making it easier for the reaction to occur. This is a fundamental property of enzymes.

Review the statement 'Enzymes can be regulated by inhibitors and activators': This is correct. Enzymes can be regulated by molecules that either inhibit their activity (inhibitors) or enhance their activity (activators). This regulation is crucial for maintaining metabolic balance.

Examine the statement 'Enzymes exhibit specificity for their substrates': This is correct. Enzymes are highly specific and typically bind to a particular substrate or group of substrates due to the precise shape and chemical properties of their active site.

Conclude that the incorrect statement is 'Enzymes increase the activation energy required for a reaction' because it contradicts the fundamental principle of enzyme function, which is to lower the activation energy.