Cell wall

Question 1

Cell wall observed by

Answer 1

Robert Hooke

Question 2

Presence of cell wall is a unique characteristic to plant cell

Answer 2

Theodore Schwann (1839)

Question 3

Kind of permeability - free or selective

Answer 3

Freely permeable - no permission required

Question 4

Formed by

Answer 4

Cell secretion

Question 5

Dead or living ?

Answer 5

Dead layer

Question 6

cell wall of algae includes:-

Answer 6

Cellulose, galactans, mannas and minerals like - calcium carbonate

Question 7

Cell wall of bacteria is made up of :-

Answer 7

Peptidoglycan (NAG-NAM)

Question 8

Cell wall of fungi is made up of :-

Answer 8

Chitin

Question 9

Cell wall of plant is made up of :-

Answer 9

Cellulose, hemi cellulose, pectins and proteins

Question 10

Matrix of plant cell wall includes ?

Answer 10

H2O, hemi cellulose, pectins and proteins

Question 11

What are fibrils?

Answer 11

Steel bars of cell wall

Question 12

What fibrils does plant cell wall and fungi cell wall contains

Answer 12

Plant- cellulosic fibrils ….
Fungi - chitin

Question 13

Deposition of lignin

Answer 13

Lignification

Question 14

Lignin is made up of

Answer 14

Carbohydrates

Question 15

After lignification, the cell becomes dead because

Answer 15

Because protoplasm dies due to impermeability of water and lost contact with external environment

Question 16

Examples of lignification

Answer 16

1. Sclerenchyma
2. Vessels
3. Tracheids

Question 17

Deposition of suberin

Answer 17

Suberisation

Question 18

Suberin is made up of

Answer 18

It is a waxy substance made up of lipids

Question 19

Examples of suberisation

Answer 19

Endodermis in root
👇
Casparian strips
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Made up of suberin

Question 20

Deposition of cutin

Answer 20

Cutinisation

Question 21

Cutin is made up of

Answer 21

Lipids

Question 22

Examples of cutinisation

Answer 22

Cuticle layer on leaf

Question 23

Universal layer

Answer 23

Primary cell wall

Question 24

Thin and elastic layer

Answer 24

Primary cell wall

Question 25

Primary cell wall is made up of

Answer 25

Cellulose, hemi cellulose, pectin and proteins

Question 26

Single layer is of

Answer 26

Primary cell wall

Question 27

Multi layered is

Answer 27

Secondary cell wall

Question 28

Secondary cell wall is made up of

Answer 28

Cellulose, hemi cellulose, pectin, protein And depositions like, lignin, suberin, etc. as well

Question 29

Which is the first formed layer during cell division

Answer 29

Middle lamella

Question 30

Middle lamella if formed by which method

Answer 30

Cell plate method

Question 31

Pieces of Golgi bodies and ER are called

Answer 31

Phragmoplast

Question 32

What does phragmoplast forms

Answer 32

Cell plate

Question 33

Cell plate grows in which manner to form middle lamella

Answer 33

Centrifugal manner

Question 34

Middle lamella is formed by

Answer 34

2 daughter cells during cell division

Question 35

How does it act as...between 2 daughter cells

Answer 35

It acts as a Cementing layer

Question 36

Middle lamella is made up of

Answer 36

Calcium and Magnesium pectate

Question 37

Softening of fruits is caused by

Answer 37

Dissolution of middle lamella

Question 38

Which enzyme causes dissolution of middle lamella

Answer 38

Enzyme - Pectinase

Question 39

Area where secondary cell wall is absent is called

Answer 39

Pits...which generally occur in pairs

Question 40

Which pits lie opposite to each other

Answer 40

Simple pits bordered pits

Question 41

Which pits are uniform in diameter

Answer 41

Simple pits

Question 42

Flask shaped pits are

Answer 42

Broad at base and narrow at top, i.e. bordered pits

Question 43

Transverse bridge between 2 plant cells

Answer 43

Plasmodesmata also called cytoplasmic connection

Question 44

What does plasmodesmata do

Answer 44

Connects cytoplasm of neighbouring cells and helps in communicating.

Question 45

What are desmotubules

Answer 45

Tube like structures

Question 46

What are desmotubules formed by

Answer 46

They are formed by E.R

Question 47

Plasmodesmata is lined by

Answer 47

Plasma membrane

Question 48

Tertiary cell wall is found in

Answer 48

Gymnosperms