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 group of biomolecules is the most efficient for storing energy in living organisms?

Lipids

Nucleic acids

Carbohydrates

Proteins

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Verified step by step guidance

Understand the role of biomolecules in energy storage: Biomolecules such as lipids, carbohydrates, proteins, and nucleic acids serve different functions in living organisms. Energy storage is one of these functions, and the efficiency of storage depends on the molecular structure and energy density of the biomolecule.

Analyze the energy density of lipids: Lipids are composed of long hydrocarbon chains, which are highly reduced. This means they contain many C-H bonds that can release a significant amount of energy when oxidized during metabolism. Lipids are the most energy-dense biomolecules, providing approximately 9 kcal/g.

Compare lipids to carbohydrates: Carbohydrates, such as glucose and glycogen, are also used for energy storage but are less energy-dense than lipids. Carbohydrates provide approximately 4 kcal/g and are stored in a hydrated form, which makes them bulkier and less efficient for long-term energy storage.

Evaluate proteins and nucleic acids: Proteins primarily serve structural and functional roles (e.g., enzymes, signaling molecules) rather than energy storage. Nucleic acids, such as DNA and RNA, are involved in genetic information storage and transfer, not energy storage.

Conclude why lipids are the most efficient: Lipids are the most efficient biomolecules for energy storage due to their high energy density and compact storage form. They are stored in adipose tissue and can provide sustained energy over long periods, making them ideal for long-term energy reserves in living organisms.