Question

CAT ATG GGC CGG ATG AAG AGC

write the complete mRNA strand that would be formed from this DNA molecule

Answer 1

Here, I consider this given segment as the template strand of the DNA.

Transcription is the process by which an RNA sequence is synthesised using DNA as a template. During transcription, the template strand of DNA acts as the template and mRNA is synthesised based on this template. This reaction is catalysed by DNA dependent RNA polymerase. The RNA sequence formed is complementary (adenine to uracil, thymine to adenine, guanine to cytosine and cytosine to guanine) to the template strand of DNA.

Here, the DNA sequence is: 3' CAT ATG GGC CGG ATG AAG AGC 5'

So, the mRNA sequence will be: 5' GUA UAC CCG GCC UAC UUC UCG 3'

and the amino acid sequence will be: VAL TYR PRO ALA TYR PHE SER

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