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 main role of enzymes in the body?

They store genetic information.

They provide structural support to cells.

They act as biological catalysts to speed up chemical reactions.

They transport oxygen in the blood.

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Verified step by step guidance

Enzymes are specialized proteins that act as biological catalysts, meaning they speed up chemical reactions in the body without being consumed in the process.

To understand their role, recall that chemical reactions in the body often require activation energy to proceed. Enzymes lower this activation energy, making reactions occur more efficiently and at a faster rate.

Enzymes are highly specific to the reactions they catalyze. They bind to substrates (reactants) at their active site, forming an enzyme-substrate complex, which facilitates the conversion of substrates into products.

Enzymes do not store genetic information (this is the role of DNA and RNA), nor do they provide structural support (this is the role of structural proteins like collagen). They also do not transport oxygen (this is the role of hemoglobin).

The correct answer is: Enzymes act as biological catalysts to speed up chemical reactions, which is essential for maintaining life processes such as metabolism, digestion, and cellular respiration.