Read the following statements.(i) The adjacent nucleotides in a nucleic acid are linked by phosphodiester bonds.(ii) Thiamine and uracil are not found in DNA.(iii) $$B-DNA$$ has $$left-handed$$ helical structure with $$10$$ base pairs per turn.(iv) Pyrimidines are $$double-ring$$ structures with four nitrogen atoms. Which of the above statements are correct ?

Question

Read the following statements.(i) The adjacent nucleotides in a nucleic acid are linked by phosphodiester bonds.(ii) Thiamine and uracil are not found in DNA.(iii) $$B-DNA$$ has $$left-handed$$ helical structure with $$10$$ base pairs per turn.(iv) Pyrimidines are $$double-ring$$ structures with four nitrogen atoms.     Which of the above statements are correct ?

Infinity Learn · Accepted Answer

Two nucleotides are linked through $$3$$'$$-5$$' phosphodiester linkage to form a dinucleotide. Thiamine is a vitamin of B complex, not found in DNA. Pyrimidines are monocyclic (one$$ $$C-N$$ ring $$) nitrogen bases.

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