Question

Two bases are mentioned below, identify which is present in DNA and which one is present in RNA: 
(i) Thymine 
(ii) Uracil.
 

Hint:

Thymine is found in DNA, while uracil is found in RNA. Both are pyrimidines, but thymine is replaced by uracil in RNA.

Answer 1

- Thymine is present in DNA, where it pairs with adenine in double-stranded DNA.
- Uracil is present in RNA, where it pairs with adenine in RNA during transcription. Thymine is replaced by uracil in RNA.

Step 1: Thymine is part of the nucleotide structure in DNA, whereas uracil is found in RNA.


Step 2: Both thymine and uracil are pyrimidine bases, but uracil is unique to RNA.