Question 1 and question 2 DoneHomework 3 . Why is it that the primary transcript

Question

Question 1 and question 2 DoneHomework 3 . Why is it that the primary transcript in prokaryotes can immediately serve as mRNA while in eukaryotes it undergoes elaborate multistep processing? (Select all that apply.) The sigma factor in eukaryotes is unable to enter the nucleus. Prokaryotes do not have a nuclear envelope and the ribosome can start translation even before transcription ends. A 5, cap is added to the prokaryotic primary transcript allowing the ribosome to start translation immediately. -All of these choices are correct. Primary transcripts in eukaryotes contain introns that have to be removed. 2. Imagine that your lab is synthesizing a new type of cell. One of your colleagues suggests that your synthetic cell should use prokaryotic systems for all the steps of gene expression (transcription and translation) because prokaryotic protein synthesis is faster than eukaryotic protein synthesis. What characteristics of prokaryotic transcription a translation make the overall process faster than in eukaryotes? (Select all that apply.) The circular chromosome of prokaryotes makes it easier (and faster) for RNA polymerase to identify genes for transcription. The smaller ribosomes of prokaryotes can move across the mRNA faster. Because prokaryotes use fewer codons, there are fewer tRNAs to sort through. Multiple proteins can be synthesized from a single, polycistronic mRNA molecule. The primary transcript in prokaryotes does not undergo further processing, so translation can begin immediately.

Explanation / Answer

1. Prokaryotes don't have a nuclear envelope and the ribosome can start translation even before transcription ends

And

Primary transcripts in eukaryotes contain introns that have to be removed.

2. Prokaryotes lack a nuclear enveolpe, so translation can begin on a mRNA even before transcription of mRNA is complete

And

Mutiple proteins can be synthesized from a single, polycistronic mRNA molecule

And

The primary transcript in prokaryotes don't undergo further processing, so translation can begin immediately.

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