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Molecular basis of organ differentiation depends on the modulation in transcription by [2007]
a) ribosome
b) RNA polymerase.
c) anticodon
d) transcription factor 
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Molecular basis of organ differentiation depends on the modulation in ...
The process of formation of protein sequence from DNA strand is called transcription which requires RNA polymerase chain. RNA  polymerase chains are of 3-types in eukaryotes
(i)  RNA polymerase-I
(ii)  RNA polymerase II
(iii) RNA polymerase-III
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Molecular basis of organ differentiation depends on the modulation in ...
The correct answer is option 'D' - transcription factor.

- Transcription factors are proteins that regulate gene expression by binding to specific DNA sequences and modulating the transcription of target genes. They play a crucial role in the molecular basis of organ differentiation.
- Organ differentiation refers to the process by which cells in developing organs acquire specialized structures and functions. This process is tightly regulated and involves the activation or repression of specific genes.
- Transcription factors act as key regulators in this process by controlling the expression of genes that are involved in organ development and differentiation.
- They bind to specific DNA sequences called transcription factor binding sites, which are usually located in the promoter or enhancer regions of target genes.
- Upon binding, transcription factors can either enhance or inhibit the recruitment of RNA polymerase, the enzyme responsible for transcribing DNA into RNA.
- By modulating the recruitment of RNA polymerase, transcription factors can either increase or decrease the transcription of target genes, leading to changes in gene expression and ultimately organ differentiation.
- The specific combination and activity of transcription factors determine the fate of cells during organ development. Different organs require different sets of transcription factors to properly differentiate.
- For example, in the development of the liver, transcription factors such as HNF4α and FOXA2 are essential for initiating and maintaining liver-specific gene expression patterns. These factors bind to specific DNA sequences in the promoters of liver-specific genes and activate their transcription.
- In the absence of these transcription factors, the liver fails to develop properly, leading to developmental defects or organ failure.
- Therefore, the modulation of transcription by transcription factors is crucial for the molecular basis of organ differentiation. They play a vital role in controlling gene expression patterns and ensuring the proper development of organs.
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Community Answer
Molecular basis of organ differentiation depends on the modulation in ...
Option D : Transcription factor
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Molecular basis of organ differentiation depends on the modulation in transcription by [2007]a)ribosomeb)RNA polymerase.c)anticodond)transcription factorCorrect answer is option 'D'. Can you explain this answer?
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