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

Enzyme-Substrate Complex

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzyme-Substrate Complex

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Multiple Choice

What allows an enzyme to specifically recognize and bind to its substrate?

The presence of metal ions in the cytoplasm

The concentration of ATP in the cell

The overall charge of the enzyme molecule

The unique three-dimensional structure of the enzyme's active site

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Verified step by step guidance

Understand that enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Recognize that the specificity of an enzyme for its substrate is due to the unique three-dimensional structure of its active site, which is a specific region on the enzyme where the substrate binds.

Recall that the active site has a shape and chemical environment that is complementary to the substrate, allowing for a precise fit, often described by the 'lock and key' or 'induced fit' models.

Eliminate the incorrect options: (1) Metal ions in the cytoplasm may assist some enzymes but are not the primary reason for substrate specificity, (2) ATP concentration is unrelated to substrate recognition, and (3) the overall charge of the enzyme molecule does not determine substrate binding specificity.

Conclude that the correct answer is the unique three-dimensional structure of the enzyme's active site, which ensures specific recognition and binding of the substrate.