NEETBotanyBiomolecules (B)
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Chitin, found in the exoskeletons of arthropods, is a complex polysaccharide. Reason (R): Chitin is a heteropolymer made up of chemically modified sugars such as N-acetyl glucosamine. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- B(A) is correct but (R) is not correct
- CBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- D(A) is not correct but (R) is correct
Correct answer
B. (A) is correct but (R) is not correct
Step-by-step solution
Assertion (A) is correct because chitin is indeed a complex polysaccharide found in the exoskeletons of arthropods. Reason (R) is incorrect. Although chitin is made up of chemically modified sugars (N-acetyl glucosamine), NCERT specifies that these complex polysaccharides are mostly homopolymers, not heteropolymers. A homopolymer consists of only one type of monomer repeating throughout the chain. Thus, (A) is correct but (R) is not correct. Answer: (A) is correct but (R) is not correct