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

Lipids

Biochemistry

1. Introduction to Biochemistry

Lipids

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Multiple Choice

Which of the following is a primary function of fats (triacylglycerols) in biological systems?

Long-term energy storage

Encoding genetic information

Transporting oxygen in the blood

Catalyzing biochemical reactions

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Verified step by step guidance

Understand the structure and composition of fats (triacylglycerols): Fats are composed of glycerol and three fatty acid chains. They are hydrophobic molecules and are stored in adipose tissue in organisms.

Review the primary functions of fats in biological systems: Fats serve as a dense form of energy storage due to their high caloric content (9 kcal per gram compared to 4 kcal per gram for carbohydrates and proteins). They are used for long-term energy storage, especially in animals.

Eliminate incorrect options based on the roles of fats: Fats do not encode genetic information (this is the role of nucleic acids like DNA and RNA). Fats are not involved in transporting oxygen in the blood (this is the role of hemoglobin). Fats do not catalyze biochemical reactions (this is the role of enzymes, which are proteins).

Focus on the correct option: Long-term energy storage is the primary function of fats. They are broken down during periods of energy demand to provide ATP through processes like beta-oxidation and the citric acid cycle.

Conclude with the importance of fats: Fats are essential for energy storage, insulation, and protection of organs. They also play a role in cell membrane structure and signaling, but their primary function is long-term energy storage.