Plant cells Flashcards

1
Q

why is the cell wall rigid

A

water pressure

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2
Q

what is a straight chain of glucose

A

cellulose

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3
Q

cellulose is made up of bundles of

A

microfibrals

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4
Q

cellulose ____ branched, hemicellulose ___ branched

A

not, is

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5
Q

what is the function of hemicellulose

A

helps attach microfibrals to each other and forms the matrix that surrounds microfibrals

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6
Q

what makes hemicellulose

A

golgi aparatus

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7
Q

what is a glycoprotein

A

protein plus at least one carbohydrate

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8
Q

where is glycoprotein located

A

matrix

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9
Q

what is pectin

A

group of carbohydrates

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10
Q

pectin is a ____ that embeds ____ and hemicellulose

A

matrix, cellulose

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11
Q

what is the function of microfibrals

A

provide rigidity for pressure

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12
Q

when the cell wall grows it becomes

A

acidified

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13
Q

what hormone stimulates a decrease in pH

A

oxin

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14
Q

what happens when the pH drops

A

microfibrals become looser and the additional pressure causes them to stretch

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15
Q

microfibrals are not

A

elastic

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16
Q

because microfibrals are not elastic, when they stretch, and pH is reversed, it causes

A

permanent stretching

17
Q

what is the space between two adjacent cells

A

middle lamella

18
Q

the middle lamella function

A

to hold adjacent cells together

19
Q

chromoplasts lack _____ so they are not green

A

chlorophyl

20
Q

non polar molecules that are pigments in red/orange/yellow

A

caratinoids

21
Q

leucoplasts are ____

A

colorless

22
Q

stores starch

A

amyloplast

23
Q

fats and oils

A

elioplasts

24
Q

proteins

A

proteinoplast

25
Q

not yet exposed to light

A

elioplasts

26
Q

when elioplasts are exposed to light, the light signals the creation of

A

chlorophyl

27
Q

pigment that is pH sensitive and causes color changes

A

amthocyanins