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Eukaryotes > Cell wall > Flashcards

Cell wall Flashcards

1
Q

Cell wall observed by

A

Robert Hooke

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2
Q

Presence of cell wall is a unique characteristic to plant cell

A

Theodore Schwann (1839)

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3
Q

Kind of permeability - free or selective

A

Freely permeable - no permission required

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4
Q

Formed by

A

Cell secretion

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5
Q

Dead or living ?

A

Dead layer

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6
Q

cell wall of algae includes:-

A

Cellulose, galactans, mannas and minerals like - calcium carbonate

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7
Q

Cell wall of bacteria is made up of :-

A

Peptidoglycan (NAG-NAM)

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8
Q

Cell wall of fungi is made up of :-

A

Chitin

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9
Q

Cell wall of plant is made up of :-

A

Cellulose, hemi cellulose, pectins and proteins

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10
Q

Matrix of plant cell wall includes ?

A

H2O, hemi cellulose, pectins and proteins

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11
Q

What are fibrils?

A

Steel bars of cell wall

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12
Q

What fibrils does plant cell wall and fungi cell wall contains

A

Plant- cellulosic fibrils ….
Fungi - chitin

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13
Q

Deposition of lignin

A

Lignification

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14
Q

Lignin is made up of

A

Carbohydrates

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15
Q

After lignification, the cell becomes dead because

A

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

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16
Q

Examples of lignification

A
  1. Sclerenchyma
  2. Vessels
  3. Tracheids
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17
Q

Deposition of suberin

A

Suberisation

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18
Q

Suberin is made up of

A

It is a waxy substance made up of lipids

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19
Q

Examples of suberisation

A

Endodermis in root
👇
Casparian strips
👇
Made up of suberin

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20
Q

Deposition of cutin

A

Cutinisation

21
Q

Cutin is made up of

A

Lipids

22
Q

Examples of cutinisation

A

Cuticle layer on leaf

23
Q

Universal layer

A

Primary cell wall

24
Q

Thin and elastic layer

A

Primary cell wall

25
Q

Primary cell wall is made up of

A

Cellulose, hemi cellulose, pectin and proteins

26
Q

Single layer is of

A

Primary cell wall

27
Q

Multi layered is

A

Secondary cell wall

28
Q

Secondary cell wall is made up of

A

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

29
Q

Which is the first formed layer during cell division

A

Middle lamella

30
Q

Middle lamella if formed by which method

A

Cell plate method

31
Q

Pieces of Golgi bodies and ER are called

A

Phragmoplast

32
Q

What does phragmoplast forms

A

Cell plate

33
Q

Cell plate grows in which manner to form middle lamella

A

Centrifugal manner

34
Q

Middle lamella is formed by

A

2 daughter cells during cell division

35
Q

How does it act as…between 2 daughter cells

A

It acts as a
Cementing layer

36
Q

Middle lamella is made up of

A

Calcium and Magnesium pectate

37
Q

Softening of fruits is caused by

A

Dissolution of middle lamella

38
Q

Which enzyme causes dissolution of middle lamella

A

Enzyme - Pectinase

39
Q

Area where secondary cell wall is absent is called

A

Pits…which generally occur in pairs

40
Q

Which pits lie opposite to each other

A

Simple pits bordered pits

41
Q

Which pits are uniform in diameter

A

Simple pits

42
Q

Flask shaped pits are

A

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

43
Q

Transverse bridge between 2 plant cells

A

Plasmodesmata also called cytoplasmic connection

44
Q

What does plasmodesmata do

A

Connects cytoplasm of neighbouring cells and helps in communicating.

45
Q

What are desmotubules

A

Tube like structures

46
Q

What are desmotubules formed by

A

They are formed by E.R

47
Q

Plasmodesmata is lined by

A

Plasma membrane

48
Q

Tertiary cell wall is found in

A

Gymnosperms

Eukaryotes (7 decks)

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