Ncert Exercises & Solutions

Q. 5. Given below is the sequence of the coding strand of DNA in a transcription unit 3' AAiGCAGCTAT TAGG-5' write the sequence of

(a) its complementary strand

(b) the mRNA

According to base complementary rules,

(a) 5'TTACGTCGATAATCC-3'

(b) 5'CGAYYAYCGACGUAA-3'

RNA uses the base uracil (U) rather than thymine (T). So, in RNA the base pairs are
Adenine (A) pairs with uracil (U)

Guanine (G) pairs with cytosine (C).