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

Triacylglycerols

Biochemistry

10. Lipids

Triacylglycerols

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Multiple Choice

Which statement is true regarding triacylglycerols?

They are directly involved in catalyzing metabolic reactions.

They are composed of three fatty acids esterified to a glycerol backbone.

They are amphipathic molecules with both hydrophilic and hydrophobic regions.

They are major components of cell membranes.

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Verified step by step guidance

Understand the structure of triacylglycerols: Triacylglycerols are composed of three fatty acid molecules esterified to a glycerol backbone. This means that each hydroxyl group (-OH) of the glycerol molecule reacts with the carboxyl group (-COOH) of a fatty acid to form an ester bond.

Clarify the function of triacylglycerols: Triacylglycerols primarily serve as energy storage molecules in organisms. They are not directly involved in catalyzing metabolic reactions, as enzymes are responsible for catalysis.

Examine the amphipathic nature: Amphipathic molecules have both hydrophilic (water-attracting) and hydrophobic (water-repelling) regions. Triacylglycerols are hydrophobic molecules and lack amphipathic properties because their fatty acid chains are nonpolar and do not interact with water.

Analyze their role in cell membranes: Triacylglycerols are not major components of cell membranes. Instead, phospholipids, which are amphipathic, are the primary structural components of cell membranes.

Conclude the correct statement: Based on the analysis, the correct statement is that triacylglycerols are composed of three fatty acids esterified to a glycerol backbone.