Question

Which is near to plasma membrane?

• A. Tonoplast
• B. Primary cell wall
• C. Middle lamella
• D. Secondary cell wall

Answer 1

The correct option is B Primary cell wall

A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mechanism. The membrane is composed of a phospholipid bilayer arranged back-to-back. The membrane is also covered in places with cholesterol molecules and proteins. The plasma membrane is selectively permeable and regulates which molecules are allowed to enter and exit the cell. It is present below the cell wall in plant cells.

So the correct option is 'primary cell wall'.