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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
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B

AAT GCT AAG GCA
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C

UUA CGA AUC CGU
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D

UUA CGT TUC CGU
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Solution

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.

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

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