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

Enzymes are important in living organisms because they __________.

are consumed during the reactions they catalyze

increase the equilibrium constant of reactions

provide energy for cellular processes

lower the activation energy of biochemical reactions

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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.

Recall the concept of activation energy: Activation energy is the minimum energy required for a chemical reaction to occur. Enzymes work by lowering this energy barrier, making reactions proceed faster.

Eliminate incorrect options: Enzymes are not consumed during reactions, so the first option is incorrect. Enzymes do not change the equilibrium constant of reactions, as they only affect the rate, not the position of equilibrium. Enzymes do not directly provide energy for cellular processes; they facilitate reactions that release or utilize energy.

Focus on the correct function of enzymes: The correct answer is that enzymes lower the activation energy of biochemical reactions, enabling them to occur more efficiently under physiological conditions.

Summarize the importance of enzymes: Enzymes are crucial for maintaining life because they allow biochemical reactions to occur at rates necessary for cellular function, even at relatively low temperatures and mild conditions.