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Need explanation for: The chitinous exoskeleton of arthropods is formed by the polymerisation of :

The chitinous exoskeleton of arthropods is formed by the polymerisation of :

  • Option 1)

    D - glucosamine

  • Option 2)

    N - acetyl glucosamine

  • Option 3)

    lipoglycans

  • Option 4)

    keratin sulphate and chondroitin sulphate

 
Answers (2)
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THE CHITINOUS EXOSKELETON OF ARTHROPODS IS FORMED BY THE POLMERISATION OF N-ACETYL GLUCOSAMINE

 

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

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