Question

Sequence of AAT GCT TAG GCA on template segment of DNA will be represented over the transcribed mRNA as

• A.
  TTA CGA ATC CGT
• B.
  AAT GCT AAG GCA
• C.
  UUA CGA AUC CGU
• D.
  UUA CGT TUC CGU

Answer 1

The correct option is C

UUA CGA AUC CGU
Nitrogen bases in DNA and RNA

• The nitrogenous bases are of 2 types - purines (adenine and guanine) and pyrimidines (cytosine, thymine and uracil).
• RNA consists of adenine and guanine as purines.
• RNA differs from DNA in terms of the pyrimidines that it possesses. It consists of cytosine and uracil in place of thymine. It does not contain thymine, unlike DNA.

$\text{Sequence of transcribed mRNA}$

If the sequence of the template strand is AAT GCT TAG GCA, then the mRNA will have a complementary sequence and Uracil on the mRNA strand will pair with adenine on the template strand.

Thus the sequence of mRNA transcript will be - UUA CGA AUC CGU

Final answer:

c. UUA CGA AUC CGU