Question

Explain why each of these is important in transcription in prokaryotes and/or eukaryotes. 5’ cap Shine...

Explain why each of these is important in transcription in prokaryotes and/or eukaryotes.

5’ cap

Shine Delgarno sequence

f-met tRNA

A site

Peptidyl transferase

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Answer #1

Cap - protects mRNA from degradation by cytoplasmic exonucleases, provides stability to it, helps mRNA to participate in translation

Shine Dalgarno sequence - sequence on mRNA whete ribosome binds so, that it can scan mRNA for start codon

f-met-tRNA - initiator tRNA carrying formylated methionine in prokaryotes

A site - amino acyl site on ribosome where tRNA carrying a new amino acid binds so that the amino acid can be added to the peptide chain

Peptidyl transferase - enzyme responsible for the formation of peptide bond between amino acids in the peptide chain

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