Question

define cell wall ???????​

Answer 1

CELL WALL PRESENT IN PLANT CELL WORK AS AN OUTERCOVERING OF CELL MEMBRANE OF PLANT CELL

IT IS VERY TOUCH AND RIGID

AND ALSO FOUND IN SOME PROKARYOTES

MARK ME AS BRAINLIST

Answer 2

$\huge{\underline{\tt{\green{Answer-}}}}$

It is the outer rigid protective covering Or plant cells and some prokaryotes. Cell wall has a matrix of hemicellulose, pectin, glycoprotein and water in which are embedded microfibrils.

${\underline{\tt{\red{(I)\:Middle\:lamella}}}}$

It is the outermost region which functions as a cementing layer between two cells. It is never present on the outer free surface.

${\underline{\tt{\green{(II)\:Primary\:wall-}}}}$

It is thin ,elastic, first wall layer. It implant microfibrils oriented variously, it is almost form a loose network.

${\underline{\tt{\red{(III)\:Secondary\:wall-}}}}$

It is laid inner to primary wall. It is less hydrated I.e less hydrophilic in nature (30-40%) as compared to primary wall. Cellulose contain is high with long closely arranged straight and parallel microfibrils. Hemicellulose content is 25%.

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