operon dna synthesis

. Such an mRNA transcribed from many genes is described as Polycistronic. The functioning of these cistrons is controlled by a stretch of DNA called operator, located next to the cistron Z. The cistrons synthesize mRNA when the operator switch is turned on and stop the synthesis..

In 1961, Kornberg and his coworkers synthesized DNA from a mixture of deoxyribonucleoside triphosphates, DNA polymerase enzyme, metal ions and a segment of viral DNA functioning as a primer. The synthetic DNA showed biological activity. When introduced into b..

Hargobind Khorana and his colleagues produced the first synthetic DNA in 1965 by purely chemical means. They synthesised the gene coding for yeast alanine tRNA which needed only 77 base pairs. Unfortunately, this gene did not function. Khorana and his associates, in 1979, synthesized the ..

fig. 14.10 - Replication of the DNA double helix DNA serves the following functions: It is the genetic material in all prokaryotes and eukaryotes. It is capable of replication by which it can be faithfully passed on to successive generations. It is involved in the synthesis..

Transcription This is a process in which RNA is synthesized from DNA. Among the two strands of DNA one strand serves as template and is called as coding strand where as the other strand is called as non-coding strand as it does not participate in transcription. Tran..

In order to maintain its own special characteristics a cell must manufacture proteins exactly similar to those already present in it. Thus, protein synthesis requires specificity control to provide instructions about the exact sequence in which the given numbers and kinds of amino acids ..

It is a complex process and involves the participation of over a dozen enzymes and other protein factors. The intertwined DNA starts separating from a particular point and this is known as the origin of replication. The second step is that the two strands of DNA separate, before..

DNA contains the information required for the synthesis of cells specific proteins. DNA is located in the nucleoid (prokaryotes) or nucleus (eukaryotes) and protein synthesis occurs in the cytoplasm. DNA does not move to the site of protein ..

These enzymes play a role in the synthesis of DNA strands on suitable templates. They are of two types, Reverse transcriptases, which help in the synthesis of complementary DNA strands on RNA templates, DNA polymerase, which aid in the sy..

DNA contains the information required for the synthesis of cells specific proteins. DNA is located in the nucleoid (prokaryotes) or nucleus (eukaryotes) and protein synthesis occurs in the cytoplasm. DNA does not move to the site of protein sy..