Botany Which of the following statements are incorrect?I. RNA acts as genetic material as well as catalyst II. RNA is more stable than DNA III. RNA has evolved from DNA

 Which of the following statements are incorrect?
I. RNA acts as genetic material as well as catalyst 
II. RNA is more stable than DNA 
III. RNA has evolved from DNA

  1. A

    I, II 

  2. B

    Only I  

  3. C

    I, III  

  4. D

    II, III

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    Solution:

    RNA is less stable than DNA because it is single stranded, has reactive ribose sugar and relatively less stable uracil. Due to modifications in ribose sugar there is formation of deoxyribose, uracil is methylated to form thymine and single stranded nature became double stranded with the formation of complementary strand. Hence DNA has evolved from RNA.

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