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

The substance on which the enzyme acts is called the _____.

cofactor

inhibitor

product

substrate

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Verified step by step guidance

Step 1: Understand the role of enzymes in biochemical reactions. Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Step 2: Learn the terminology associated with enzyme activity. The substance on which an enzyme acts is referred to as the 'substrate.' The enzyme binds to the substrate at its active site to form an enzyme-substrate complex.

Step 3: Differentiate between the given options: 'cofactor,' 'inhibitor,' 'product,' and 'substrate.' A cofactor is a non-protein molecule or ion that assists enzyme activity. An inhibitor is a molecule that decreases enzyme activity. A product is the result of the enzymatic reaction. The substrate is the molecule that the enzyme acts upon.

Step 4: Recall that the substrate is the starting material in an enzymatic reaction, which undergoes transformation into the product. This is a key concept in enzyme kinetics and biochemistry.

Step 5: Confirm that the correct answer to the question is 'substrate,' as it is the substance on which the enzyme acts during the reaction.