1.2 PLANT CELL ARCHITECTURE Flashcards

Cell Wall, Cell Membrane

1
Q

principle scaffolding component of a cell wall

A

cellulose

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2
Q

reason for different patterns in layers of cell wall

A

depolymerization and repolymerization

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3
Q

type of cell wall- relatively thicker, stronger
-has lignin for strength, support, and protection
-required for terrestrial colonization and vertical growth

A

secondary cell wall

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4
Q

type of cell wall- characteristic in young/growing plants
offers physical support

A

primary cell wall

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5
Q

different compounds that compose a cell wall…

A

carbohydrates, structural proteins, aromatic, polymeric lipids

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6
Q

holds together cell wall of neighboring plant

A

middle lamella

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7
Q

process of separating middle lamella

A

maceration

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8
Q

types of carbohydrates in cell wall

A

cellulose, hemicellulose, pectins

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9
Q

carbohydrate:
cross-linking glycans
can coat microfibrils together with their Hydrogen bonds to the microfibrils

A

hemicellulose

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10
Q

carbohydrate:
-determines wall porosity
-provides charged surfaces that modulate pH/ ion balance
-regulate cell to cell adhesion at the middle lamella
- contains recognition molecules to alert

A

pectins

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11
Q

types of structural proteins in cell wall…

A

hydroxyproline, proline, glycine, arabinogalactan proteins

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12
Q

type of aromatic compounds in cell wall

A

hydroxycinnamates

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13
Q

polymeric lipids in cell wall

A

waxes, cutins, suberins

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14
Q

functions of a cell membrane in a eukaryotic cell:

A

-envelope genetic material
-delimit boundaries of other internal structures
-regulate fluxes of ions and metabolites

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15
Q

membrane protein- embedded in bilayer

A

integral protein

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16
Q

membrane protein- bound to bilayer by non covalent bonds

A

peripheral protein

17
Q

membrane protein- bound covalently to bilayer via lipid molecules

A

anchored protein

18
Q

what cell membrane is called
-same basic molecular organization
-lipid bilayer w/ embedded proteins

A

fluid mosaic membrane

19
Q

helps with selective traffic of solutes in cell membrane

A

embedded membrane proteins