Question

19. List steps common to the regulation of transcription both RNA and DNA

Answer 1

Answer-- Transcriptional Regulation --controlling the rate of gene transcription for example by helping or hindering RNA polymerase binding to DNA.

(a) Transcription---The process of making RNA from a DNA template by RNA polymerase .

(b) Transcription factor ---- substance ,such as protein , that contributes to the cause of a specific biochemical reaction or bodily process.

(c)promotor--A region of DNA that initiates transcription of a particular gene .

(d)sigma factor ---Specialized bacterial co- factor that complete with RNA polymerase and encode sequence specificity .

(d) coactivator-- A protein that works with transcription factors to increase the rate of gene transcription .

(e)copressor--A protein that works with transcription factors to decrease the rate of gene transcription.

In molecular biology and genetics, transcriptional regulation is the means by which a cell regulates the cobverconv of DNA and RNA , thereby orchestrating gene activity . A single gene can be regulated in a range of ways , from altering the no. Of copies of DNA that are transcribed, to the temporal control of when the gene is transcribed.