Question

Below is a schematic of gene Hemoglobin beta subunit (HBS), which encodes protein HBS. The promoter region is indicated by the dotted box. Transcriptions begins immediately following the promoter. The mature mRNA produced by this gene would be approximately how many nucleotides long?

A) 100

B) 200

C) 3000

D) 5000

E) 7000

1. Below is a schematic of gene Hemoglobin beta subunit (HBS), which encodes protein HBS. The promoter region is indicated by the dotted box. Transcription begins immediately following the promoter. Transcriptional terminator Promoter Exon Inteon 1 Exon 2 Intron Exon 31 1 100 1100 2100 3100 4100 5100 base pairs Positions 200-203 - Start codon Positions 1800-4802 - Stop codon The mature mRNA produced by this gene would be approximately how many nucleotides long? A) 100 B) 200 C) 3000 D) 5000 E) 7000

Answer 1

Option C

The image shown is premature mRNA. It will undergo RNA processing to form mature mRNA. In this procrss, introns and other non coding regions will be removed.

1 to 100 is promoter which will be removed.

1100 to 2100 and 3100 to 4100 are introns which will be removed.

Only exons will be there, 100 to 1100, 2100 to 3100 and 4100 to 5100, which is approximately equal to 3000 nucleotides.

Please rate high.