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

10. Lipids

Waxes

Biochemistry

10. Lipids

Waxes

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Multiple Choice

Which of the following best describes the primary biological role of waxes?

They act as primary energy storage molecules in animal cells.

They are the main structural components of cell membranes.

They function as enzymes that catalyze metabolic reactions.

They serve as protective coatings to prevent water loss in plants and animals.

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Verified step by step guidance

Understand the structure and properties of waxes: Waxes are esters formed from long-chain fatty acids and long-chain alcohols. Their hydrophobic nature makes them water-resistant.

Identify the biological role of waxes: Waxes are not involved in energy storage, membrane structure, or enzymatic activity. Instead, their primary function is related to their water-resistant properties.

Relate waxes to protective coatings: In plants, waxes are found in the cuticle layer, which prevents water loss and protects against environmental stress. In animals, waxes can be found in fur or feathers, providing similar protective functions.

Eliminate incorrect options: Waxes do not act as primary energy storage molecules (like glycogen or triglycerides), structural components of membranes (like phospholipids), or enzymes (which are proteins).

Conclude the correct biological role: Based on their hydrophobic and protective properties, waxes serve as protective coatings to prevent water loss in plants and animals.