Question

Number of networks present in a plant cell wall is

• A. Three
• B. Two
• C. One
• D. Four

Answer 1

Answer: (A)

Three

• The three important cell wall networks in a plant cell are cellulosic, pectin and glycoprotein networks.
  

1. Cellulose is an important component of plant cell walls that make the plant stems, leaves and branches rigid, they are present in the form of cellulosic microfibrils (fibre-like strands) in the inner layer of primary wall.
   
2. Pectin is an essential polysaccharide present in the plant cell wall that allows the extension of a primary cell wall and in plant growth.
   
3. Hydroxyproline-rich glycoproteins form an important structural component of cell walls.
   

• So, the correct answer is 'Three'.