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 molecules is primarily used for long-term energy storage in animals?

Nucleotides

Triglycerides

Amino acids

Glycogen

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Understand the role of each molecule listed in the question: Nucleotides are primarily involved in genetic information storage and energy transfer (e.g., ATP), not long-term energy storage. Amino acids are building blocks of proteins and are not used for long-term energy storage. Glycogen is a short-term energy storage molecule in animals, primarily stored in the liver and muscles.

Recognize that triglycerides are the primary molecules used for long-term energy storage in animals. They are stored in adipose tissue and consist of three fatty acids attached to a glycerol backbone.

Recall the biochemical properties of triglycerides: They are hydrophobic and energy-dense, making them ideal for long-term storage. Their breakdown through β-oxidation yields a significant amount of ATP.

Compare the energy storage roles of glycogen and triglycerides: Glycogen is used for short-term energy needs and is quickly mobilized, while triglycerides are used for long-term energy storage due to their higher energy yield per gram.

Conclude that the correct answer is triglycerides, as they are specifically adapted for long-term energy storage in animals, unlike the other molecules listed.