NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
Which one of the following is the sequence on corresponding coding strand, if the sequence on mRNA formed is as follows 5’AUCGAUCGAUCGAUCGAUCGAUCG AUCG 3’?
- A3’ UAGCUAGCUAGCUAGCUAGCUAGCUAGC 5’
- B5’ ATCGATCGATCGATCGATCGATCGATCG 3’
- C3’ ATCGATCGATCGATCGATCGATCGATCG 5’
- D5’ UAGCUAGCUAGCUAGCUAGCUAGCUAGC 3’
View written solutionFree
Correct answer: B
The sequence on the mRNA is 5’AUCGAUCGAUCGAUCGAUCGAUCG AUCG 3’. The mRNA is synthesized from the template strand of DNA by complementary base pairing, following these rules: A pairs with U, U pairs with A, C pairs with G, and G pairs with C. The coding strand of DNA has the same sequence as the mRNA, except with T instead of U.
To find the sequence on the corresponding coding strand, we can use these rules to convert the mRNA sequence back to DNA :
5’ AUCGAUCGAUCGAUCGAUCGAUCG AUCG 3’ (mRNA)
5’ ATCGATCGATCGATCGATCGATCG ATCG 3’ (coding strand DNA)
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