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

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

A fat (or triacylglycerol) would be formed as a result of a dehydration reaction between ________.

three fatty acids and one glycerol molecule

two fatty acids and one glucose molecule

three monosaccharides and one fatty acid

one fatty acid and three glycerol molecules

Previous problemNext problem

Verified step by step guidance

Understand the structure of a triacylglycerol (fat): A triacylglycerol is composed of one glycerol molecule and three fatty acid molecules. Glycerol is a three-carbon alcohol with hydroxyl (-OH) groups, while fatty acids are long hydrocarbon chains with a carboxyl (-COOH) group.

Recognize the type of reaction involved: A dehydration reaction (also called a condensation reaction) occurs when two molecules are joined together with the removal of a water molecule. In this case, the hydroxyl group from glycerol and the hydrogen from the carboxyl group of a fatty acid combine to form water.

Identify the correct reactants: To form a triacylglycerol, three fatty acids must react with one glycerol molecule. Each fatty acid attaches to one of the hydroxyl groups on glycerol through an ester bond, releasing three water molecules in total.

Eliminate incorrect options: Analyze the other choices provided. For example, two fatty acids and one glucose molecule cannot form a triacylglycerol because glucose is a carbohydrate, not a glycerol molecule. Similarly, three monosaccharides and one fatty acid are unrelated to fat formation, and one fatty acid with three glycerol molecules does not match the structure of a triacylglycerol.

Conclude the correct answer: Based on the structure and reaction mechanism, the correct answer is 'three fatty acids and one glycerol molecule.' This combination aligns with the biochemical process of triacylglycerol synthesis.