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List the possible levels of gene expression control in the typical embryo, i.e., from the DNA...

List the possible levels of gene expression control in the typical embryo, i.e., from the DNA itself to the final functional protein product. Explain, briefly, how each step could be a control point for gene expression. BE AS DETAILED AS POSSIBLE
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Answer #1

Level of Gene expression in atypical embryo :

A) At DNA level - epigenetic control or DNA methylation patterns that govern wether the transcription will take place or not.

At RNA level : Transcriptional control - presence of maternal factors that drive the transcription of zygotic genes . Influence of chromatin structure on transcription results in repression or stimulation of gene expression. Covalent Histone modifications also control gene transcription . Nucleosome remodeling : it involves a change in structure of nucleosome but no change in its position .

Post - transcriptional gene control

A) RNA interference : it causes RNA silencing by small silencing RNA in a sequence- specific manner.

Post - translational control : it is the covalent modification of protein.

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