Plant cell bio Flashcards

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1
Q

Function of cell wall

A

Tensile strength

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2
Q

How is the cell wall formed

A

Rosette shaped cellulose synthesizing complex

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3
Q

How does the rosette shaped complex work

A

Releases cellulose microfibrils outside plasma membrane

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4
Q

What happens to the cellulose microfibrils after they’re released

A

Polymerize + hydrogen bond to form cell wall

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5
Q

What does the cellulose microfibril deposition arrangement depend on

A

the arrangement of the microtubule

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6
Q

Microtubule function in plasma membrane

A

Determines pattern of cellulose microfibril formation

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7
Q

Cell wall components

A

Cellulose microfibrils, hemicellulose, pectin, lignin, soluble protein

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8
Q

Main component of secondary cell wall

A

Lignin

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9
Q

What happens to the cell when the secondary cell wall is added

A

It dies

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10
Q

Why does addition of lignin kill the cell

A

It prevents fusion of gas and water

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11
Q

Cell wall layers

A

Primary cell wall, middle lamella, secondary cell wall.

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12
Q

Which cell wall layer is closer to the plasma membrane

A

Secondary cell wall

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13
Q

Why is secondary cell wall closer to plasma membrane

A

Because they’re formed inside out

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14
Q

Which cell wall layer is the oldest

A

Primary/outermost

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15
Q

What replaces the extracellular matrix in plants

A

middle lamella

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16
Q

What is the middle lamella made of

A

Pectin

17
Q

Function of pectin

A

Forms gel in matrix to “glue” stuff together, links with calcium ions to create jelly like pectin network structure filling middle lamella

18
Q

What is cellulose made of

A

Beta glucose

19
Q

When might the secondary cell wall be formed

A

After expansion ceases

20
Q

What is the difference in composition and structure between primary and secondary cell wall

A

Cellulose microfibrils more parallel than in primary and higher proportion of cellulose in secondary

21
Q

How do animal cells expand

A

Organelle synthesis

22
Q

Plants expansion method

A

Water uptake

23
Q

What direction does a plant cell expand in

A

Perpendicular to the cellulose microfibrils