NEET-XII-Chemistry
05: Biomolecules
- #24Write the important structural and functional differences between DNA and RNA.
Ans : The structural differences between DNA and RNA are as follows:
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DNA
RNA
1.
The sugar moiety in DNA molecules is β-D-2 deoxyribose.
1.
The sugar moiety in RNA molecules is β-D-ribose.
2.
DNA contains thymine (T). It does not contain uracil (U).
2.
RNA contains uracil (U). It does not contain thymine (T).
3.
The helical structure of DNA is double-stranded.
3.
The helical structure of RNA is single-stranded.
The functional differences between DNA and RNA are as follows:
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DNA
RNA
1
DNA is the chemical basis of heredity.
1
RNA is not responsible for heredity.
2
DNA molecules do not synthesise proteins, but transfer coded message for the synthesis of proteins in the cells.
2
Proteins are synthesised by RNA molecules in the cells.
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