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

6. Enzymes and Enzyme Kinetics

Enzymes

Biochemistry

6. Enzymes and Enzyme Kinetics

Enzymes

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Multiple Choice

Which type of enzyme peel is most suitable for exfoliating dry skin?

Glycolic acid

Papain (from papaya)

Salicylic acid

Retinoic acid

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Verified step by step guidance

Understand the role of enzymes in exfoliation: Enzymes like papain (from papaya) are proteolytic enzymes that break down proteins in the outer layer of the skin, helping to remove dead skin cells gently. This makes them suitable for dry skin, which requires mild exfoliation without causing irritation.

Compare the options provided: Glycolic acid, salicylic acid, and retinoic acid are chemical exfoliants. They work by dissolving bonds between skin cells or promoting cell turnover, but they can be harsher and may cause dryness or irritation, especially for already dry skin.

Focus on papain: Papain is derived from papaya and is a natural enzyme that gently exfoliates by breaking down keratin proteins in the skin. It is less likely to cause irritation compared to chemical exfoliants, making it ideal for dry skin.

Consider the mechanism of action: Papain works enzymatically, targeting protein structures in the skin's outer layer. This process is effective for removing dead skin cells without stripping moisture, which is crucial for dry skin.

Conclude suitability: Based on the gentle nature of papain and its enzymatic action, it is the most suitable option for exfoliating dry skin compared to the other chemical exfoliants listed.