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 a protein-based structure?

Ribosome

Phospholipid bilayer

Actin filament

Microtubule

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Verified step by step guidance

Step 1: Understand the question. The problem is asking which of the listed structures is protein-based. This requires knowledge of the composition of each structure.

Step 2: Analyze the options. Ribosome is a complex structure made of both RNA and proteins. Phospholipid bilayer is primarily composed of lipids, not proteins. Actin filament is a structure made of actin proteins. Microtubule is composed of tubulin proteins.

Step 3: Recall the definition of protein-based structures. Protein-based structures are primarily composed of proteins and perform various functions in the cell, such as providing structural support or enabling movement.

Step 4: Compare the options to the definition. Actin filament and microtubule are both protein-based structures, as they are composed of actin and tubulin proteins, respectively. Ribosome contains proteins but is not entirely protein-based, and the phospholipid bilayer is lipid-based.

Step 5: Conclude that the correct answer is Actin filament, as it is explicitly mentioned in the problem as the correct protein-based structure.