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 of the following best describes a triacylglycerol?

A carbohydrate consisting of three glucose units linked together

A lipid molecule composed of three fatty acids esterified to a glycerol backbone

A nucleic acid with three phosphate groups attached to a ribose sugar

A protein with three peptide chains joined by disulfide bonds

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Verified step by step guidance

Step 1: Understand the structure of a triacylglycerol. A triacylglycerol is a type of lipid molecule. It consists of a glycerol backbone (a three-carbon molecule) to which three fatty acid chains are attached via ester bonds.

Step 2: Analyze the options provided. Option A describes a carbohydrate, which is unrelated to lipids. Option C describes a nucleic acid, and Option D describes a protein. These do not match the structure of a triacylglycerol.

Step 3: Focus on the correct description. The correct description of a triacylglycerol is a lipid molecule composed of three fatty acids esterified to a glycerol backbone.

Step 4: Recall the esterification process. In triacylglycerols, each hydroxyl group (-OH) of the glycerol reacts with the carboxyl group (-COOH) of a fatty acid, forming an ester bond and releasing water (a dehydration reaction).

Step 5: Conclude that the correct answer is the option describing a lipid molecule composed of three fatty acids esterified to a glycerol backbone, as it matches the biochemical structure of a triacylglycerol.