Molecular basis of organ differentiation depends on the modulation in transcription by

Answer: Option B

The molecular basis of organ differentiation depends on the modulation in transcription by the Transcription factor.
A transcription factor is a molecule that controls the activity of a gene by determining whether the gene's DNA (deoxyribonucleic acid) is transcribed into RNA (ribonucleic acid).
Proteins are involved in the process of converting, or transcribing, DNA into RNA. Transcription factors include a wide number of proteins, excluding RNA polymerase that initiate and regulate the transcription of genes.