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 feature that phospholipids and cholesterol have in common?

Both are classified as triglycerides

Both contain fatty acid tails attached to a glycerol backbone

Both function primarily as energy storage molecules

Both are major components of cell membranes

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Verified step by step guidance

Understand the structure and function of phospholipids: Phospholipids are amphipathic molecules composed of a glycerol backbone, two fatty acid tails (hydrophobic), and a phosphate group (hydrophilic). They are major components of cell membranes, forming the lipid bilayer.

Understand the structure and function of cholesterol: Cholesterol is a sterol, meaning it has a rigid ring structure with a hydroxyl group (-OH) and a hydrophobic tail. Cholesterol is also a major component of cell membranes, where it modulates fluidity and stability.

Compare the classification: Phospholipids are not triglycerides, as they contain a phosphate group instead of a third fatty acid. Cholesterol is not a triglyceride either; it belongs to the sterol class of lipids.

Compare the function: Neither phospholipids nor cholesterol primarily function as energy storage molecules. Triglycerides are the main energy storage lipids in the body, while phospholipids and cholesterol are structural components of membranes.

Conclude the shared feature: Both phospholipids and cholesterol are major components of cell membranes, contributing to their structure and function. This is the correct answer based on their biological roles.