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प्रश्न
Write the structures of fragments produced on complete hydrolysis of DNA. How are they linked in DNA molecule? Draw a diagram to show pairing of nucleotide bases in double helix of DNA.
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उत्तर
Complete hydrolysis of DNA (or RNA) yields a pentose sugar, phosphoric acid and nitrogen-containing heterocyclic compounds (called bases). In DNA molecules, the sugar moiety is β-D-2-deoxyribose whereas in RNA molecule, it is β-D-ribose.
Two nucleic acid chains are wound about each other and held together by hydrogen bonds between pairs of bases. The two strands are complementary to each other because the hydrogen bonds are formed between specific pairs of bases.
Double strand helix structure for DNA
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संबंधित प्रश्न
Write the structure of a nucleoside
Which of the following NOT present in DNA?
(a) adenine
(b) Guanine
(c) Thymine
(d) Uracil
Write the structure of a nucleotide
What type of linkage is present in nucleic acids?
What are nucleic acids?
Give balanced equations for the following reactions:
Name the nitrogen base residues present in DNA
Name the purine bases and pyrimidine bases present in RNA and DNA.
Which base is present in RNA, but not in DNA?
Nucleic acids are the polymers of ______.
DNA and RNA contain four bases each. Which of the following bases is not present in RNA?
Which of the following bases is not present in DNA?
Purine derivative among the following bases is ______.
Write the important structural differences between DNA and RNA.
Which of the following statements is not true about RNA?
Write two differences between DNA and RNA.
Give a reason for the following observations:
The two strands in DNA are complementary to each other.
