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 correctly describes the sequence of events in the catalytic action of an enzyme?

Substrate is released → Enzyme-substrate complex forms → Product binds

Substrate binds to active site → Enzyme-substrate complex forms → Product is released

Product binds to active site → Enzyme-product complex forms → Substrate is released

Enzyme is denatured → Substrate binds → Product is released

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Verified step by step guidance

Step 1: Understand the role of enzymes in catalysis. Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy. They achieve this by binding to substrates at their active site.

Step 2: Recall the sequence of events in enzyme catalysis. The process typically begins with the substrate binding to the enzyme's active site, forming an enzyme-substrate complex. This is a key intermediate step.

Step 3: After the enzyme-substrate complex forms, the enzyme facilitates the conversion of the substrate into the product. This involves breaking and forming chemical bonds, depending on the reaction.

Step 4: Once the product is formed, it is released from the enzyme's active site, leaving the enzyme free to catalyze another reaction. The enzyme itself remains unchanged and can be reused.

Step 5: Evaluate the options provided in the problem. The correct sequence should align with the typical catalytic mechanism: Substrate binds to active site → Enzyme-substrate complex forms → Product is released.