Question

The skin has an outer layer made up of .......... which is almost impermeable to germs.

• A. Keratin
• B. Lipid
• C. Fat
• D. Carbohydrate

Answer 1

The correct option is A Keratin

The skin is the largest organ of the body, with a surface area of 18 square feet. Its two main layers are the epidermis (outer layer) and dermis (inner layer). The epidermis has several strata (layers) that contain four cell types. Keratinocytes produce keratin, a protein that gives skin its strength and flexibility and waterproofs the skin surface.

So, the correct answer is option A.