Skincare Skincare MCQ 5 — Questions and Answers
Question 1: Which acid is an alpha-hydroxy acid (AHA) derived from milk and is gentler than glycolic acid?
- Citric acid
- Lactic acid (Correct answer)
- Tartaric acid
- Malic acid
Correct answer: Lactic acid
Lactic acid is a mild AHA derived from milk that exfoliates the skin while also having humectant properties to hydrate.
Question 2: What is the 'skin barrier' primarily composed of?
- Collagen and elastin
- Ceramides, fatty acids, and cholesterol (Correct answer)
- Hyaluronic acid and water
- Melanin and keratin
Correct answer: Ceramides, fatty acids, and cholesterol
The skin barrier (stratum corneum) is primarily composed of ceramides, fatty acids, and cholesterol in a 'brick and mortar' structure.
Question 3: Which professional skin treatment uses a diamond-tipped wand or fine crystals to physically exfoliate the skin surface?
- Chemical peel
- Microdermabrasion (Correct answer)
- Microneedling
- Laser resurfacing
Correct answer: Microdermabrasion
Microdermabrasion uses abrasive crystals or a diamond-tipped wand to mechanically exfoliate and remove the outermost layer of dead skin cells.
Question 4: What skin concern does bakuchiol address as a natural alternative to retinol?
- Sunburn relief
- Anti-aging and fine line reduction (Correct answer)
- Acne spot treatment
- Deep pore cleansing
Correct answer: Anti-aging and fine line reduction
Bakuchiol is a plant-derived ingredient that mimics retinol's anti-aging effects, stimulating collagen and reducing fine lines with fewer side effects.
Question 5: What is 'slugging' as a skincare trend?
- Applying snail mucin serum before bed
- Layering multiple serums in quick succession
- Sealing the nighttime skincare routine with a thick occlusive like petroleum jelly (Correct answer)
- Using a jade roller to massage the face
Correct answer: Sealing the nighttime skincare routine with a thick occlusive like petroleum jelly
Slugging involves applying a generous layer of petroleum jelly (like Vaseline) as the last step of a nighttime routine to lock in moisture.
Question 6: Which UVA/UVB protection rating system is used in Japan and Asia to indicate protection against UVA rays?
- SPF rating
- PA+ system (Correct answer)
- IPD rating
- UVI index
Correct answer: PA+ system
The PA+ system (Protection Grade of UVA) is used primarily in Japan and Asia to indicate the level of UVA protection in sunscreens.
Question 7: What is the primary role of humectants in skincare formulations?
- To physically block UV radiation
- To dissolve and remove dead skin cells
- To draw moisture from the environment into the skin (Correct answer)
- To kill acne-causing bacteria
Correct answer: To draw moisture from the environment into the skin
Humectants like hyaluronic acid and glycerin work by attracting water molecules from the environment and deeper skin layers into the upper skin layers.
Skincare Skincare MCQ 5
Which acid is an alpha-hydroxy acid (AHA) derived from milk and is gentler than glycolic acid?