Question

Define Cell Wall??????????????​

Answer 1

Answer:

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

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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Answer 2

$\Large {\textsf{\textbf \red{Answér :-}}}$

• 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.