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

Carbohydrates

Biochemistry

1. Introduction to Biochemistry

Carbohydrates

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Multiple Choice

Why are carbohydrates and fats considered high-energy foods?

Because they contain many C–H bonds that can be oxidized to release energy.

Because they are insoluble in water and therefore store more energy.

Because they are composed primarily of nitrogen and sulfur atoms.

Because they are the only macromolecules that can be used to build cell membranes.

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Verified step by step guidance

Understand the concept of high-energy foods: High-energy foods are those that release a significant amount of energy when metabolized. This energy is stored in chemical bonds, particularly in C–H bonds, which are abundant in carbohydrates and fats.

Analyze the structure of carbohydrates and fats: Both macromolecules are composed primarily of carbon (C), hydrogen (H), and oxygen (O). The presence of numerous C–H bonds in their structure makes them ideal for energy storage and release during oxidation.

Explain the oxidation process: During cellular respiration, C–H bonds are broken down, and the electrons are transferred to oxygen molecules. This process releases energy, which is captured in the form of ATP (adenosine triphosphate), the energy currency of the cell.

Evaluate the incorrect options: The statement 'Because they are insoluble in water and therefore store more energy' is incorrect because solubility does not directly correlate with energy storage. The statement 'Because they are composed primarily of nitrogen and sulfur atoms' is incorrect because carbohydrates and fats are not primarily composed of these elements. The statement 'Because they are the only macromolecules that can be used to build cell membranes' is incorrect because proteins and lipids, not carbohydrates, are the primary components of cell membranes.

Conclude with the correct answer: Carbohydrates and fats are considered high-energy foods because they contain many C–H bonds that can be oxidized to release energy during metabolic processes.