e4. Chitin (Polysaccharide)

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What type of polysaccharide is chitin?

Structural

Where can chitin be found?

Exoskeletons of insects and in fungal cell walls

What molecule is chitin similar to?

Cellulose

What bond joins its β-glucose monomers?

β-1,4 glycosidic bonds

How does it allow hydrogen bonds to be formed?

Each adjacent monomer is inverted 180 degrees to allow hydrogen bonds to be formed between OH groups of parallel chitin chains

What does cross-linking of chitin chains allow?

Microfibrils to be formed

How is chitin different from cellulose?

Each monomer has a group derived from amino acid called acetylamine group added onto it