Plant cells Flashcards
why is the cell wall rigid
water pressure
what is a straight chain of glucose
cellulose
cellulose is made up of bundles of
microfibrals
cellulose ____ branched, hemicellulose ___ branched
not, is
what is the function of hemicellulose
helps attach microfibrals to each other and forms the matrix that surrounds microfibrals
what makes hemicellulose
golgi aparatus
what is a glycoprotein
protein plus at least one carbohydrate
where is glycoprotein located
matrix
what is pectin
group of carbohydrates
pectin is a ____ that embeds ____ and hemicellulose
matrix, cellulose
what is the function of microfibrals
provide rigidity for pressure
when the cell wall grows it becomes
acidified
what hormone stimulates a decrease in pH
oxin
what happens when the pH drops
microfibrals become looser and the additional pressure causes them to stretch
microfibrals are not
elastic
because microfibrals are not elastic, when they stretch, and pH is reversed, it causes
permanent stretching
what is the space between two adjacent cells
middle lamella
the middle lamella function
to hold adjacent cells together
chromoplasts lack _____ so they are not green
chlorophyl
non polar molecules that are pigments in red/orange/yellow
caratinoids
leucoplasts are ____
colorless
stores starch
amyloplast
fats and oils
elioplasts
proteins
proteinoplast
not yet exposed to light
elioplasts
when elioplasts are exposed to light, the light signals the creation of
chlorophyl
pigment that is pH sensitive and causes color changes
amthocyanins
