Question

The sequence of an mRNA molecule produced from a DNA template strand with the composition

5'-AGCTACACT-3' is

• A. 5'-AGUGUAGCU-3'
• B. 5'-UCGAUGUGA-3'
• C. 5'-AGTGTAGCT-3'
• D. 5'-TCGATGTGA-3'

Answer 1

Answer: (B)

The two stands of DNA are complementary to each other and the bases of one stand are paired with the bases of other strand by means of hydrogen bonding, i.e., A = T and $G\equiv C$ . But uracil (U) instead of thymine (T) is present in case of RNA. Thus, the sequence of base on m-RNA molecule is

DNA strand 5'-AGCTACACT-3'

m-RNA 5'-UCGAUGUCA-3'