Question

Refer to the given sequence of steps and select the correct option.
DNA $\stackrel{\left(i\right)}{\to }$ hnRNA $\stackrel{\left(ii\right)}{\to }$ mRNA $\stackrel{\left(iii\right)}{\to }$ Proteins

• A. (i) Replication, (ii) Transcription, (iii) - Translation
• B. (i) Replication, (ii) Processing, (iii) - Translation
• C. (i) Transcription, (ii) Splicing, (iii) - Translation
• D. (i) Transcription, (ii) Replication, (iii) - Translation

Answer 1

The correct option is C (i) Transcription, (ii) Splicing, (iii) - Translation

DNA contains genetic information which is transcribed via mRNA. mRNA is not made directly in eukaryotic cell. It is transcribed in the nucleus as hnRNA which contains introns and exons. The introns are removed by RNA splicing leaving behind exons which contain the information. The exonic regions of RNA are joined together to produce a single chain RNA required for functioning as translational template. This information is then translated into polypeptide chains.

So, the correct answer is '(i) Transcription, (ii) Splicing, (iii) - Translation'.