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

What is the primary effect of enzymes on chemical reactions?

They supply energy to drive the reaction forward.

They lower the activation energy required for the reaction.

They permanently change the products of the reaction.

They increase the equilibrium constant of the reaction.

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Verified step by step guidance

Understand the role of enzymes in biochemical reactions: Enzymes are biological catalysts that speed up chemical reactions without being consumed in the process.

Clarify the concept of activation energy: Activation energy is the minimum energy required for reactants to transform into products. Enzymes lower this energy barrier, making reactions occur more easily and quickly.

Analyze the incorrect options: Enzymes do not supply energy to drive the reaction forward; instead, they facilitate the reaction by lowering activation energy. They also do not permanently change the products of the reaction, as they only affect the rate of reaction, not the outcome. Additionally, enzymes do not alter the equilibrium constant of a reaction; they only help the system reach equilibrium faster.

Focus on the correct answer: The primary effect of enzymes is to lower the activation energy required for the reaction, enabling it to proceed more efficiently.

Summarize the key takeaway: Enzymes are essential for regulating the speed of biochemical reactions, ensuring that they occur under physiological conditions without altering the fundamental properties of the reaction.