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

Which of the following best describes an enzyme?

A structural protein that provides support to cellular membranes

A biological catalyst that speeds up chemical reactions without being consumed

A type of carbohydrate that stores energy in cells

A lipid molecule that forms the main component of cell membranes

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Verified step by step guidance

Step 1: Begin by understanding the definition of an enzyme. An enzyme is a type of protein that acts as a biological catalyst, meaning it speeds up chemical reactions without being consumed in the process.

Step 2: Compare the given options to the definition of an enzyme. Eliminate options that do not align with the characteristics of enzymes.

Step 3: Option A describes a structural protein, which is not a catalyst. Structural proteins provide support but do not facilitate chemical reactions.

Step 4: Option C describes a carbohydrate, which is primarily involved in energy storage, not catalysis. Option D describes a lipid, which forms cell membranes but does not act as a catalyst.

Step 5: Option B correctly identifies an enzyme as a biological catalyst that speeds up chemical reactions without being consumed. This matches the definition of an enzyme.