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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.
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
Which of the following NOT present in DNA?
(a) adenine
(b) Guanine
(c) Thymine
(d) Uracil
What are three types of RNA molecules which perform different functions?
What are nucleic acids?
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.
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at ____________.
Which base is present in RNA, but not in DNA?
Write the important structural differences between DNA and RNA.
Give a reason for the following observations:
The two strands in DNA are complementary to each other.
What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?
