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

The primary role of the B vitamins is to:

act as coenzymes in metabolic reactions

function as hormones regulating gene expression

provide structural components for cell membranes

serve as a major energy source for cells

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Verified step by step guidance

Understand the role of B vitamins in the body: B vitamins are water-soluble vitamins that play a crucial role in various metabolic processes. They are not hormones, structural components, or energy sources, so we need to focus on their biochemical function.

Define the term 'coenzyme': A coenzyme is a non-protein compound that binds to an enzyme and assists in catalyzing a biochemical reaction. B vitamins often act as coenzymes or precursors to coenzymes in metabolic pathways.

Identify specific examples of B vitamins acting as coenzymes: For instance, Vitamin B1 (thiamine) is a precursor for thiamine pyrophosphate, which is a coenzyme in carbohydrate metabolism. Similarly, Vitamin B2 (riboflavin) forms FAD and FMN, which are coenzymes in redox reactions.

Eliminate incorrect options: B vitamins do not function as hormones regulating gene expression, nor do they provide structural components for cell membranes. They also do not serve as a major energy source for cells, as energy primarily comes from macronutrients like carbohydrates, fats, and proteins.

Conclude that the correct answer is 'act as coenzymes in metabolic reactions,' as this aligns with the biochemical role of B vitamins in facilitating enzymatic activity in metabolic pathways.