The chitinous exoskeleton of arthropods is formed by the polymerisation of :
D - glucosamine
N - acetyl glucosamine
lipoglycans
keratin sulphate and chondroitin sulphate
As discussed in
Exoskeleton of cockroach -
The body of cockroach is covered by thick hard chitinous cuticle, which is secreted by epidermis, forming the exoskeleton.
- wherein
Each segment of exoskeleton contains 4 layers called sclerites, the dorsal sclerites is called sternum or sternite; two lateral sclerites are called pleura or pleurites. The terga, sternum and pleura are joined by arthrodial membrane.
exoskeleton of cockroach is composed of hard chitinous cuticle which is made up of N aacetyl glucosamine
Option 1)
D - glucosamine
Option is incorrect
Option 2)
N - acetyl glucosamine
Option is correct
Option 3)
lipoglycans
Option is incorrect
Option 4)
keratin sulphate and chondroitin sulphate
Option is incorrect
THE CHITINOUS EXOSKELETON OF ARTHROPODS IS FORMED BY THE POLMERISATION OF N-ACETYL GLUCOSAMINE