ECM

Q. What is the function of the extracellular matrix

1. Selectively regulates the movement of substances in and out of cells.
2. protect cells from engulfment by eukaryotic cells
3. gives the cell rigidity and strength
4. provides structural and biochemical support to the surrounding cells.

Q. How many among the following are components of algal cell wall?
$\begin{array}{c}\text{Cellulose, galactans, pectin, mannans, calcium carbonate, N-acetyl glucosamine}\end{array}$

1. Two
   
2. Four
   
3. Three
   
4. Five