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

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following statements about enzymes is correct?

Enzymes are permanently altered and used up during the reaction.

Enzymes act as reactants in biochemical reactions.

Enzymes are not consumed in the reactions they catalyze and can be used repeatedly.

Enzymes increase the activation energy required for a reaction.

Previous problemNext problem

Verified step by step guidance

Step 1: Begin by understanding 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.

Step 2: Clarify the concept of activation energy. Activation energy is the minimum energy required for reactants to transform into products. Enzymes decrease this energy barrier, making reactions occur more efficiently.

Step 3: Address the statement 'Enzymes are permanently altered and used up during the reaction.' This is incorrect because enzymes are not consumed or permanently altered during the reaction. They remain unchanged and can catalyze multiple reactions.

Step 4: Evaluate the statement 'Enzymes act as reactants in biochemical reactions.' This is also incorrect because enzymes are not reactants; they facilitate the reaction without being part of the reactants or products.

Step 5: Confirm the correct statement: 'Enzymes are not consumed in the reactions they catalyze and can be used repeatedly.' This is accurate because enzymes retain their structure and function after catalyzing a reaction, allowing them to be reused.