Question

The endodermal cells show Casparian strips made up of ______________.

• A. cellulose
• B. cutin
• C. suberin
• D. pectin

Hint:

Casparian strip ensures controlled uptake of minerals into vascular tissue.

Answer 1

The Correct Option is C

Step 1: Understanding Casparian strips.
Casparian strips are specialized bands present in the radial and transverse walls of endodermal cells in roots.
Step 2: Chemical composition.
These strips are made of suberin, a waxy and hydrophobic substance.
Step 3: Functional significance.
Suberin blocks apoplastic movement of water, forcing selective absorption through cell membranes.
Step 4: Conclusion.
Hence, Casparian strips are made up of suberin.