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 class of biomolecules is primarily responsible for long-term energy storage in animals?

Triglycerides

Amino acids

Nucleotides

Monosaccharides

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Verified step by step guidance

Step 1: Begin by understanding the function of each biomolecule class mentioned in the problem. Triglycerides are lipids that serve as long-term energy storage molecules in animals. Amino acids are building blocks of proteins, primarily involved in structural and functional roles rather than energy storage. Nucleotides are the building blocks of nucleic acids like DNA and RNA, and are involved in genetic information storage and transfer. Monosaccharides are simple sugars that provide short-term energy.

Step 2: Recall that long-term energy storage in animals is typically achieved through molecules that are energy-dense and can be stored in large quantities without requiring water. Lipids, specifically triglycerides, fulfill this role because they are hydrophobic and pack tightly in adipose tissue.

Step 3: Compare the energy storage efficiency of triglycerides versus other biomolecules. Triglycerides provide more energy per gram compared to carbohydrates (monosaccharides) because they have a higher proportion of reduced carbon atoms, which release more energy upon oxidation.

Step 4: Eliminate the incorrect options based on their primary functions. Amino acids are not used for energy storage; they are used for protein synthesis. Nucleotides are involved in genetic information storage, not energy storage. Monosaccharides provide short-term energy, not long-term storage.

Step 5: Conclude that triglycerides are the correct answer because they are the primary biomolecules responsible for long-term energy storage in animals, stored in adipose tissue and mobilized during periods of energy demand.