A) pectin
B) chitin
C) lignin
D) cellulose
Correct Answer: A
Solution :
Nick name of Spirogyra (green alga) is mermaids tresses. Cell wall of this alga is of two layered, the inner and outer. The inner layer is thin, structureless and is mainly cellulosic in nature. The outer layer has a substratum of cellulose impreg = nated with iron and pectic compounds. Later partly dissolve in water and form slime layer.
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