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NEET AIPMT SOLVED PAPER SCREENING 2012

  • question_answer
    An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is

    A) cuticle                  

    B)        sporopollenin

    C)                        lignin                    

    D)        cellulose

    Correct Answer: B

    Solution :

    Sporopollenin is a fatty substance present in the exine of pollen grains. It is resistant to microbial and chemical decomposition and can withstand the extreme environmental conditions.   Due   to   presence   of Sporopollenin, pollen grains are well preserved during fossilization.


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