A) cutin
B) suberin
C) sporopollenin
D) callose
Correct Answer: C
Solution :
Exine of pollen grains is made up of highly resistant substance the sporopollenin Cutin is a heterogenous polymer. It is formed by ester bonds between hydroxyl groups and carboxyl groups of fatty acids. It forms component with waxes and pectin polysaccharides of plant cuticles. Suberin is a complex mixture of fatty acid oxidation and condensation products and occurs in the walls of cork and most endodermal cells. Suberized cell wall becomes impermeable to water. Callose is a branched polysaccharide. It is formed due to injury and may be deposited. So, that the activity of cell impaired or Finished
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