In the middle lamella of plant cell walls,one of the main elements is

Which of the following components are present in the plant cell wall?
$(1)$ Cellulose $(2)$ Protein $(3)$ Galactans $(4)$ Mannans $(5)$ Suberin
$(6)$ Pectin $(7)$ Hemicellulose $(8)$ Calcium carbonate

Match the following columns regarding cell wall composition:

Column-$I$	Column-$II$
$P$. Algae	$I$. Absent
$Q$. Fungi	$II$. Chitin
$R$. Plants	$III$. Cellulose,Hemicellulose,Pectins,Proteins
$S$. Animals	$IV$. Cellulose,Galactans,Mannans,$CaCO_3$

Which of the following substances is $NOT$ deposited in the secondary cell wall?

The synthesis of polymers in which of the following structures is catalyzed by membrane enzymes?

$P -$ Statement: The middle lamella is composed of cellulose plates.
$Q -$ Statement: During the formation of gametes,cell division occurs by mitosis.