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1 Feb 2019

RNA polymerase and mRNA splicing molecules recognize and act on start codons.

True or False

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Lelia Lubowitz
Lelia LubowitzLv2
3 Feb 2019

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Related questions

which statement about pre-mRNA splicing is false?

OR

Write a short note on pre-mRNA splicing.

 

A. To make an mRNA transcript from a gene, the RNA polymerase needs to 'know' where to start and to stop. What are the signals and proteins involved in initiating and terminating RNA polymerase activity in E. coli?

B. Alternative splicing is a key feature of the eukaryotic transcription-translation process.

i) In eukaryotes, alternative splicing of pre-mRNAs can result in the production of many structurally distinct proteins from information encoded in a single gene. Explain.

ii) Do lower eukaryotes (such as yeast, Saccharomyces cerevisiae) have the same opportunity to use alternative splicing to generate a vast array of proteins from a single gene? Explain.

iii) What other splicing events can lead to additional diversity in the repertoire of proteins that could be encoded by a single gene? Hint: think of the N and C terminal ends. What about a post-translational mechanism. Name one.

TRUE or FALSE (Explain)

The length and sequence of introns dictate the efficiency of the splicing reaction.

Splicing is dictated by sequence features in pre-mRNA transcripts.

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