The Total solution for NCERT class 6-12
Write the important structural and functional differencesbetween DNA and RNA.
Answer - 31 : -
The structural differences between DNA and RNA are asfollows:
S.No
DNA
RNA
1
The sugar moiety in DNA molecules is ╬▓-D-2 deoxyribose.
The sugar moiety in RNA molecules is ╬▓-D-ribose.
2
DNA contains thymine (T). It does not contain uracil (U).
RNA contains uracil (U). It does not contain thymine (T).
3
The helical structure of DNA is double-stranded.
The helical structure of RNA is single-stranded
The functional differences between DNA and RNA are asfollows:
DNA is the chemical basis of heredity.
RNA is not responsible for heredity.
DNA molecules do not synthesise proteins, but transfer coded message for the synthesis of proteins in the cells.
Proteins are synthesised by RNA molecules in the cells.
What are the different types of RNA found in the cell?
Answer - 32 : -
(i)┬аMessengerRNA (m-RNA)
(ii)┬аRibosomalRNA (r-RNA)
(iii) TransferRNA (t-RNA)
┬а