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प्रश्न
Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?
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उत्तर
Functional mRNA of structural genes need not always include all of its exons. This alternate splicing of exons is sex-specific, tissue-specific, and even developmental stage-specific. By such alternate splicing of exons, a single gene may encode for several isoproteins and/or proteins of similar class. In absence of such a kind of splicing, there should have been new genes for every protein/isoprotein. Such an extravagancy has been avoided in natural phenomena by way of altemate splicing.
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संबंधित प्रश्न
State the difference between the structural genes in a Transcription Unit of Prokaryotes and Eukaryotes.
Explain (in one or two lines) the function of the following:
tRNA
In split genes, the coding sequence are called ______.
The correct sequence of gene expression is:
- Formation of the primary transcript
- Regulation of splicing
- Transport of mRNA from the nucleus to the cytoplasm
- Translation
The term gene was coined by ______.
The transcription unit is represented in the diagram given below.
Identify site (i), factor (ii), and Enzyme (iii) responsible for carrying out the process.
Exons help in synthesis of ______.
Define a cistron. Giving examples differentiate between monocistronic and polycistronic transcription unit.
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by ______.
A transcription unit is defined by three structural regions. Which of the following correctly lists these three regions in their proper order from 5' to 3' on the coding strand?
Which DNA sequence element is located at the 3' end of a transcription unit and signals the termination of transcription?
What is the primary function of the Structural Gene within a transcription unit?
What is the relationship between the Coding Strand sequence and the mRNA sequence produced during transcription?
With respect to which strand are all coordinates such as 'upstream' and 'downstream' defined in a transcription unit?
Define Introns in the context of eukaryotic split genes.
In the context of a transcription unit, how do the Promoter and Terminator work together to regulate the transcription process?
