Question

The sequence of bases on m – RNA molecule, synthesized on the GCATA strand of DNA, is:

• A. CGUAU
• B. CGTAT
• C. TACGU
• D. ATCGC

Answer 1

Answer: (A)

CGUAU

First we note that, all bases are coded as their complementary bases in m-RNA.
Adenine(A) is coded as uracil(U) in RNA.
Guanine(G) is coded as cytosine(C) in RNA.
Cytosine(C) is coded as guanine(G) in RNA.
Thymine(T) is coded as adenine(A) in RNA.
So, GCATA will be coded as CGUAU.