BCH

Question 1

Describe chitin

Answer 1

Chitin is a structural homoglycan found in the exoskeletons of insects and crustaceans and also the cell wall of most fungi/algae

Question 2

Cotton fibres are almost entirely________ Wood is about half_________. It’s a component of synthetic materials e.g fabric, crayon and cellophone.
Humans and other mammals can metabolise starch, ____________ lactose, and sucrose.
Mammals cannot metabolise _____________because they lack enzymes catalyzing the hydrolysis of ß glycosidic linkages.

Answer 2

Cellulose,
Cellulose,
Glycogen,
Cellulose.

Question 3

Ruminants such as cows and sheep have ______________ in their rumen that produce ____________ so they can obtain glucose from plants rich in cellulose.

Answer 3

Microorganisms,

ã-glycosidases

Question 4

_____________can also obtain glucose from dietary cellulose because they have cellulose producing bacteria in their digestive tracts.

Answer 4

Termites

Question 5

_________ are not heteroglycans

Answer 5

Glycoconjugates

Question 6

Glycoconjgates consist of

Answer 6

Polysaccharides linked to proteins or peptides.

Question 7

Types of heteroglycans

Answer 7

√Proteoglycans
√Peptidoglyans
√Glycoproteins

Question 8

Proteoglycans are

Answer 8

Complexes of proteins and a class of polysaccharides called glycosamino glycans