Write the main structural difference between DNA and RNA. Of the two bases, thymine and uracil, which one is present in DNA ? (2 marks)
(i) Difference between DNA and RNA :
The bases which are common to both DNA and RNA are :
(i) Adenine (A) (ii) Guanine (G) (iii) Cytosine (C)
(ii) Thymine is present in DNA.