Question

Match the columns and find the correct option.

	I		II
(p)	Plasma membrane mainly contains	(i)	Hemicellulose
(q)	Middle lamella is mainly composed of	(ii)	Calcium pectate
		(iii)	Proteinaceous filaments
		(iv)	Proteins embedded m phospholipid bilayer

• A. p-ii, q-i
• B. p-i, q-ii
• C. p-iv, q-ii
• D. p-iii, q-iv

Answer 1

The correct option is C p-iv, q-ii

p) The cell membrane is a phospholipid bilayer that are selectively permeable membranes which separate the interior of the cells (cell organelles and cytoplasm) from the outside environment.

• It is made up of protein molecules are embedded in the phospholipid bilayer and some amount of carbohydrates are also present in the cell membrane.
  

q) The middle lamella is a layer rich in pectins (calcium pectate and magnesium pectate) which form plasmodesmata connections between adjacent cell walls.

• This layer cements the cell walls of two adjacent plant cells.
  
• It is the first formed outermost layer (cell plate formed during cell division forms the middle lamella or lamellum).
  
• So, the correct answer is 'p-iv, q-ii'.