4.3 Flashcards
Barbara Regina
What is the cell wall made out of?
Cellulose molecules
what are the monomer units in starch?
alpha glucose
what are the monomer units in cellulose?
beta glucose
what type of glycosidic bond is there in cellulose?
carbon 1 to carbon 4 glycosidic bonds.
the linking of beta glucose molecules means that the ________groups stick out on both sides of the molecule.
hydroxyl
what is cross-linking?
a hydrogen bond can be made between the partially positively charged hydrogen atoms of the hydroxyl groups and the partially negatively charged oxygen atoms in other areas of the glucose molecules.
what bond is made between the partially positively charged hydrogen atoms of the hydroxyl groups and the partially negatively charged oxygen atoms in other areas of the glucose molecules in a cellulose molecule.
hydrogen bond
is starch or cellulose being described: very long and straight chain
cellulose
what is the structure of starch?
1-4 and 1-6 glycosidic bonds between alpha glucose monomers (form a compact globular molecules that are useful for storage)
what is starch important for?
It is important for a store of energy in plants
when can’t animals digest cellulose?
When they don’t possess the enzymes needed to break the 1-4 glycosidic bonds between the molecules of beta glucose.
what do 24 cellulose molecules make?
a microfibril
what are microfibrils for?
to create considerable strength
