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

Which of the following is true about cell wall except

(1)determines shape of the cell

(2)prevent cell from bursting and collapsing

(3)selective permeable in nature

(4)provides strong structural support

Mesosomes extensions can be present in the form of

(1)vesicles

(2)tubules

(3)lamellae

(4)All of the above

Which of the following is true about chromatophores

(1)its’s a plasma membrane infolding

(2)site of photosynthesis

(3)contain pigments

(4)All of the above

Bacterial flagella is composed of

(1)basal body, Hook, filament

(2) basal body and filament

(3)  Hook and filament,

(4)Hook, filament and base