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 lipids in biological systems?

They provide genetic information for protein synthesis.

They catalyze biochemical reactions as enzymes.

They act as structural components of nucleic acids.

They serve as long-term energy storage molecules.

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Verified step by step guidance

Understand the role of lipids in biological systems: Lipids are a diverse group of biomolecules that include fats, oils, phospholipids, and steroids. Their primary functions include energy storage, structural roles in cell membranes, and signaling.

Eliminate incorrect options by analyzing their relevance to lipids: Lipids do not provide genetic information for protein synthesis (this is the role of nucleic acids like DNA and RNA). Lipids do not catalyze biochemical reactions as enzymes (this is the role of proteins). Lipids are not structural components of nucleic acids (nucleic acids are composed of nucleotides, not lipids).

Focus on the correct function: Lipids serve as long-term energy storage molecules. This is due to their high energy density, as they contain many carbon-hydrogen bonds that release energy upon oxidation.

Relate the correct function to biological systems: Lipids, such as triglycerides, are stored in adipose tissue and can be broken down into fatty acids and glycerol during periods of energy demand. This process provides ATP for cellular activities.

Conclude the reasoning: Based on the analysis, the correct answer is that lipids serve as long-term energy storage molecules, which is a primary function in biological systems.