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

Unlike other catalysts, enzymes do not get used up in the reaction; they are ___.

consumed as reactants

permanently altered by the substrate

converted into products

regenerated after each 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 reactions by lowering the activation energy required for the reaction to proceed.

Recognize that enzymes are not consumed during the reaction: Unlike reactants, enzymes remain unchanged after facilitating the reaction. This is a key characteristic of catalysts.

Clarify the concept of enzyme regeneration: After the reaction, enzymes return to their original state, ready to catalyze another reaction. This is why they are described as being 'regenerated' rather than consumed or permanently altered.

Eliminate incorrect options: 'Consumed as reactants' is incorrect because enzymes are not used up like reactants. 'Permanently altered by the substrate' is incorrect because enzymes retain their structure and function after the reaction. 'Converted into products' is incorrect because enzymes are not transformed into products; they facilitate the formation of products.

Conclude that the correct answer is 'regenerated after each reaction,' as this aligns with the fundamental property of enzymes being reusable catalysts in biochemical processes.