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

Cholesterol is a steroid that has which additional functional group attached to its structure?

Hydroxyl group (–OH)

Amino group (–NH_2)

Carboxyl group (–COOH)

Aldehyde group (–CHO)

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Verified step by step guidance

Step 1: Understand the structure of cholesterol. Cholesterol is a steroid molecule, which means it has a characteristic four-ring structure known as the steroid nucleus.

Step 2: Recall the functional groups listed in the question: Hydroxyl group (–OH), Amino group (–NH₂), Carboxyl group (–COOH), and Aldehyde group (–CHO). Each of these groups has distinct chemical properties and roles in biochemistry.

Step 3: Identify the functional group attached to cholesterol. Cholesterol has a hydroxyl group (–OH) attached to the carbon at position 3 of the steroid nucleus. This hydroxyl group is responsible for cholesterol's amphipathic nature, making it partially hydrophilic.

Step 4: Eliminate the other options. Cholesterol does not contain an amino group (–NH₂), carboxyl group (–COOH), or aldehyde group (–CHO) in its structure. These groups are not part of the cholesterol molecule.

Step 5: Conclude that the correct functional group attached to cholesterol is the hydroxyl group (–OH), which plays a key role in its biological function and interaction with other molecules.