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

Characteristics of Life

Biochemistry

1. Introduction to Biochemistry

Characteristics of Life

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Multiple Choice

Vitamin D and vitamin K share which of the following characteristics?

Both are stored in significant amounts in the body's water compartments.

Both are synthesized exclusively by plants.

Both are fat-soluble vitamins.

Both function primarily as coenzymes in carbohydrate metabolism.

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Verified step by step guidance

Step 1: Begin by identifying the key characteristics of vitamins D and K. Both are classified as fat-soluble vitamins, meaning they dissolve in fats and oils and are stored in the body's fatty tissues and liver.

Step 2: Understand the storage mechanism of fat-soluble vitamins. Unlike water-soluble vitamins, fat-soluble vitamins are not stored in the body's water compartments but rather in lipid-rich areas.

Step 3: Examine the synthesis of these vitamins. Vitamin D can be synthesized in the human body through exposure to sunlight, while vitamin K is partially synthesized by gut bacteria. Neither is synthesized exclusively by plants.

Step 4: Analyze their primary functions. Vitamin D plays a role in calcium and phosphorus metabolism, supporting bone health, while vitamin K is essential for blood clotting and bone metabolism. Neither primarily functions as coenzymes in carbohydrate metabolism.

Step 5: Conclude that the correct shared characteristic is that both are fat-soluble vitamins, as this aligns with their biochemical properties and functions.