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

Proteins

Biochemistry

1. Introduction to Biochemistry

Proteins

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Multiple Choice

Which of the following is NOT a protein found in the human body?

Cellulose

Hemoglobin

Insulin

Collagen

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Verified step by step guidance

Step 1: Understand the question. The problem asks to identify which of the given options is NOT a protein found in the human body. This requires knowledge of the structure and function of proteins and other biomolecules.

Step 2: Review the options provided. Hemoglobin, insulin, and collagen are all proteins, while cellulose is a carbohydrate. Proteins are composed of amino acids, whereas carbohydrates like cellulose are composed of sugar units.

Step 3: Recall the function of each option. Hemoglobin is a protein responsible for oxygen transport in the blood. Insulin is a protein hormone that regulates blood sugar levels. Collagen is a structural protein found in connective tissues. Cellulose, on the other hand, is a polysaccharide found in plant cell walls and is not synthesized by the human body.

Step 4: Compare the molecular composition. Proteins are made of amino acids linked by peptide bonds, while cellulose is made of glucose units linked by β-1,4-glycosidic bonds. This difference in composition confirms that cellulose is not a protein.

Step 5: Conclude that cellulose is the correct answer because it is not a protein and is not found in the human body, unlike hemoglobin, insulin, and collagen.