explain the process of transcription?

Question

biology answert it.........................................................

Answer 1

Transcription is the process of copying something in all of its uses. In biology it is how the enzymes copy DNA to produce the proper RNA to run the organism. This process creates peptides and proteins that make life possible. Transcription has some error checking involved in it, but it is not as good as direct copying of DNA is so mistakes can enter the organism easier causing problems or even mutations.

Transcription is necessary to reproduce the RNA from areas of the DNA that don’t copy themselves. It starts with Initiation, then Elongation where the actual copying and proofreading is done then the newly form RNA stain forms an end loop at Termination.

Transcription happens in Transcription Factories located in the cells’ nucleus. Viruses like HIV and AIDS have the ability to read the cell’s transcription and to reverse that transcription writing there own code into the cell and thus taking over the cell and forcing it to produce more of the virus.

Read the article for more information.

According to Wikipedia: http://en.wikipedia.org/wiki/Transcription_%28genetics%29
“Transcription is the process through which a DNA sequence is enzymatically copied by an RNA polymerase to produce a complementary RNA. So to say, it is the transfer of genetic information from DNA into RNA. In the case of protein-encoding DNA, transcription is the beginning of the process that ultimately leads to the translation of the genetic code (via the mRNA intermediate) into a functional peptide or protein. The stretch of DNA that is transcribed into an RNA molecule is called a transcription unit. Transcription has some proofreading mechanisms, but they are fewer and less effective than the controls for copying DNA; therefore, transcription has a lower copying fidelity than DNA replication…

Active transcription units are clustered in the nucleus, in discrete sites called ‘transcription factories’. Such sites could be visualized after allowing engaged polymerases to extend their transcripts in tagged precursors (Br-UTP or Br-U), and immuno-labeling the tagged nascent RNA…

Some viruses (such as HIV, the cause of AIDS), have the ability to transcribe RNA into DNA in order to see a cell's genome. The main enzyme responsible for this type of transcription is called reverse transcriptase. In the case of HIV, reverse transcriptase is responsible for synthesising a complementary DNA strand (cDNA) to the viral RNA genome. An associated enzyme, ribonuclease H, digests the RNA strand and reverse transcriptase synthesises a complementary strand of DNA to form a double helix DNA structure. This cDNA is integrated into the host cell's genome via another enzyme (integrase) causing the host cell to generate viral proteins which reassemble into new viral particles. Subsequently, the host cell undergoes programmed cell death (apoptosis).”

Answer 2

The Process Of Transcription Produces

Answer 3

Transcription is the process through which a DNA sequence is enzymatically copied by an RNA polymerase to produce a complementary RNA. So to say, it is the transfer of genetic information from DNA into RNA. In the case of protein-encoding DNA, transcription is the beginning of the process that ultimately leads to the translation of the genetic code (via the mRNA intermediate) into a functional peptide or protein. The stretch of DNA that is transcribed into an RNA molecule is called a transcription unit. Transcription has some proofreading mechanisms, but they are fewer and less effective than the controls for copying DNA; therefore, transcription has a lower copying fidelity than DNA replication.[1]

As in DNA replication, transcription proceeds in the 5' → 3' direction (i.e. the old polymer is read in the 3' → 5' direction and the new, complementary fragments are generated in the 5' → 3' direction). In the case of transcription, the "old polymer" is the DNA template (non-coding) strand. RNA polymerase binds to the 3' end of a gene on the DNA template strand and travels toward the 5' end. In the process, the RNA polymerase synthesizes an RNA molecule from its 5' end to the 3' end. Except for the fact that thymines in DNA are converted to uracils in RNA, the newly synthesized RNA strand will have the same sequence as the coding (non-template) strand of the DNA. For this reason, scientists usually refer to the DNA coding strand when referring to the directionality of genes on DNA, not the template strand. Thus, genes are said to be transcribed in the 5' → 3' direction.


Transcription is divided into 3 stages: initiation, elongation and termination.

Answer 4

Enzyme Responsible For Transcription

Answer 5

Transcription: DNA > mRNA / DNA is copied - DNA in, mRNA out Translation: mRNA > Proteins / mRNA decoded - mRNA in, Proteins out Hope this is short enough and helps

Answer 6

it is the process of synthesis of mRNA from a DNA template by hekp of enzymes in the nucleus