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Which is the primary step for regulation...

Which is the primary step for regulation of gene expression.

A

Transport of m-RNA from nucleus to the cytoplasm

B

Translational level

C

Processing level

D

Transcriptional level

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Text Solution:** 1. **Understanding Gene Expression Regulation:** - Gene expression regulation refers to the various mechanisms that control the rate and manner in which genes are expressed. This can occur at multiple levels including transcription, post-transcription, translation, and post-translation. 2. **Identifying the Primary Step:** - Among the different levels of regulation, the primary step for the regulation of gene expression is at the transcriptional level. This is where the DNA is transcribed into messenger RNA (mRNA). 3. **Transcription Process:** - During transcription, specific segments of DNA are copied into mRNA. This process is crucial as it determines which genes are expressed and how much of the corresponding protein is produced. 4. **Post-Transcriptional Modifications:** - After transcription, the mRNA undergoes several modifications, including splicing (removing introns), capping (adding a 5' cap), and tailing (adding a poly-A tail). These modifications are important for mRNA stability and translation efficiency. 5. **Transport to Cytoplasm:** - Once processed, the mature mRNA is transported from the nucleus to the cytoplasm where it can be translated into a protein. 6. **Conclusion:** - Therefore, the primary step for the regulation of gene expression is at the transcriptional level, where the initial copying of DNA into mRNA occurs. **Final Answer:** - The primary step for the regulation of gene expression is at the transcriptional level. ---
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