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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
Define the following term:
Nucleotide
What are nucleic acids?
Draw the structures of adenine.
Give balanced equations for the following reactions:
Name the nitrogen base residues present in DNA
Name the base that is found in nucleotide of RNA only.
Name the purine bases and pyrimidine bases present in RNA and DNA.
Which base is present in RNA, but not in DNA?
Which of the following bases is not present in DNA?
Which of the following is not a protein?
Purine derivative among the following bases is ______.
Which of the following contributes to the double helical structure of DNA?
Write two differences between DNA and RNA.
Mention two important functions of nucleic acids.
Give a reason for the following observations:
The two strands in DNA are complementary to each other.
