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

Functional Groups

Biochemistry

1. Introduction to Biochemistry

Functional Groups

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Multiple Choice

Which three elements are found in all biological macromolecules?

Iron, magnesium, and chlorine

Carbon, hydrogen, and oxygen

Calcium, potassium, and sodium

Nitrogen, phosphorus, and sulfur

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Verified step by step guidance

Step 1: Understand the concept of biological macromolecules. Biological macromolecules are large molecules essential for life, including carbohydrates, lipids, proteins, and nucleic acids. These molecules are primarily composed of certain key elements.

Step 2: Recall the primary elements found in biological macromolecules. Carbon (C), hydrogen (H), and oxygen (O) are the foundational elements present in all macromolecules because they form the backbone of organic chemistry and are involved in the structure and function of these molecules.

Step 3: Analyze the options provided. Iron, magnesium, and chlorine are trace elements and not universally found in all macromolecules. Calcium, potassium, and sodium are important for cellular functions but are not structural components of macromolecules. Nitrogen, phosphorus, and sulfur are found in specific macromolecules (e.g., proteins and nucleic acids) but not universally in all.

Step 4: Recognize that carbon, hydrogen, and oxygen are the correct answer because they are universally present in carbohydrates, lipids, proteins, and nucleic acids, forming the structural framework of these molecules.

Step 5: Conclude that understanding the universal presence of carbon, hydrogen, and oxygen in biological macromolecules is essential for grasping the basics of biochemistry and molecular biology.