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

1. Introduction to Biochemistry

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Lactase is an example of which type of macromolecule?

Protein

Carbohydrate

Lipid

Nucleic acid

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Verified step by step guidance

Step 1: Understand the question by identifying the macromolecule categories provided: Protein, Carbohydrate, Lipid, and Nucleic acid. These are the four major types of biological macromolecules.

Step 2: Recall that lactase is an enzyme. Enzymes are biological catalysts that speed up chemical reactions in living organisms.

Step 3: Learn that enzymes are composed of amino acids and are classified as proteins. Proteins are macromolecules made up of long chains of amino acids linked by peptide bonds.

Step 4: Eliminate the other options by understanding their definitions: Carbohydrates are sugars and starches, Lipids are fats and oils, and Nucleic acids are DNA and RNA. None of these categories describe enzymes like lactase.

Step 5: Conclude that lactase belongs to the protein category because it is an enzyme, and enzymes are proteins.