Which of the following is not true about cell wall

(1)protects cell from mechanical damage

(2)permeable to water

(3)It’s a living structure

(4)absent in animals

Galactans and mannans are the important component of cell wall of

(1)Plant

(2)Algae

(3)Fungi

(4)Bacteria

The common component between the cell wall of algae and plants is

(1)cellulose

(2)Hemicellulose

(3)Both A and B

(4)Mannans

Which of the following cell wall comes early and disappears gradually  in the life of plant?

(1)primary cell wall

(2)secondary cell wall

(3)tertiary cell wall

(4)Both A and B

Which of the following holds the neighbouring cells together

(1)calcium pectate

(2) sodium pectate

(3)Both A and B

(4)manganese pectate

Which of the following connects the cell wall of the neighbouring cells?

(1)plasmodesmata

(2)Desmosomes

(3)Gap junction

(4)Tight junction

How many layers are present in cell envelope of prokaryotes?

(1)4

(2)3

(3)2

(4)1

Which of the following is the part of cell envelope?

(1)glycocalyx

(2) cell wall and cell membrane

(3)Both A and B

(4)Glycocalyx and cell wall

If glycocalyx is loose then it is called as ____________and if it’s tough and thick then it is called as _________

(1)slime layer, capsule

(2)slime mould ,capsule

(3)capsule, slime layer

(4)capsule, slime mould

Mesosomes extensions can be present in the form of

(1)vesicles

(2)tubules

(3)lamellae

(4)All of the above