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

How many isoprenoid units are present in the structure of β-carotene?

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Verified step by step guidance

Understand the structure of β-carotene: β-carotene is a carotenoid composed of a long chain of conjugated double bonds and is derived from isoprenoid units.

Recall the definition of an isoprenoid unit: An isoprenoid unit is a five-carbon structure based on isoprene (C₅H₈). These units are the building blocks of many natural compounds.

Analyze the molecular structure of β-carotene: β-carotene consists of 40 carbon atoms. Since each isoprenoid unit contributes 5 carbon atoms, divide the total number of carbon atoms by 5 to determine the number of isoprenoid units.

Set up the calculation: Use the formula \( \text{Number of isoprenoid units} = \frac{\text{Total carbon atoms}}{5} \). For β-carotene, this would be \( \frac{40}{5} \).

Interpret the result: The calculation will yield the number of isoprenoid units present in β-carotene, which corresponds to the correct answer provided in the problem.