JEE Main & Advanced JEE Main Paper (Held on 10-4-2019 Morning)

  • question_answer Amylopectin is composed of : [JEE Main 10-4-2019 Morning]

    A) \[\alpha \text{-D-glucose, }{{\text{C}}_{\text{1}}}\text{--}{{\text{C}}_{\text{4}}}\] and \[{{\text{C}}_{\text{1}}}\text{--}{{\text{C}}_{\text{6}}}\text{ linkages}\]

    B) \[\alpha \text{-D-glucose, }{{\text{C}}_{\text{1}}}\text{--}{{\text{C}}_{\text{4}}}\] and \[{{\text{C}}_{2}}\text{--}{{\text{C}}_{\text{6}}}\text{ linkages}\]

    C) \[\beta \text{-D-glucose, }{{\text{C}}_{\text{1}}}\text{--}{{\text{C}}_{\text{4}}}\]and \[{{\text{C}}_{2}}\text{--}{{\text{C}}_{\text{6}}}\text{ linkages}\]

    D) \[\beta \text{-D-glucose, }{{\text{C}}_{\text{1}}}\text{--}{{\text{C}}_{\text{4}}}\]and \[{{\text{C}}_{1}}\text{--}{{\text{C}}_{\text{6}}}\text{ linkages}\]

    Correct Answer: A

    Solution :

    Amylopetcin is a homo polymer of \[\alpha \text{-D-glucose}\]where\[{{\text{C}}_{\text{1}}}\text{-}{{\text{C}}_{\text{4}}}\text{linkage}\]and \[{{\text{C}}_{\text{1}}}\text{-}{{\text{C}}_{\text{4}}}\text{linkage}\] are present.


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