Question

The outermost layer of cheek cells and onion peel cells is

• A. Cell membrane, cell wall
• B. Cell wall, cell membrane
• C. Tonoplast, cell wall
• D. Cell wall, tonoplast

Answer 1

The correct option is A

Cell membrane, cell wall

The correct option is A:

Explanation of the correct option:

Plant cell

1. Cell wall is the protective outer covering seen in plants, fungi, some protists and prokaryotes.
2. It is a permeable outer covering.
3. Plant cell wall is made up of cellulose, which is a fibrous carbohydrate which cannot be digested by humans.
4. The outer membrane of vacuole is known as tonoplast.

Animal cell

1. Cheek cells are animal cells thus doesn’t have cell wall, but have cytoplasm, cell membrane and nucleus.
2. Thus, the outer membrane is the plasma membrane.

Thus, The outermost layer of cheek cells and onion peel cells is Cell membrane and Cell wall.