Transcription
Transcription is the process of creating mRNA from DNA. This is the first step in the process of creating proteins form DNA. First, a chemical called helicase unwinds the DNA helix and breaks the hydrogen bonds between the bases. Then, another chemical called RNA Polymerase substitutes in the complementary bases, sugars, and phosphates onto the second exposed strand of DNA. The point where transcription begins is called the promoter. Transcription continues to a point called the terminator. At this point, the RNA molecule is finished being transcribed.
Something important to note about this process is the fact that a base called Uracil, or U, is exchanged for Thymine during transcription. Its chemical makeup is similar to Thymine and it is also a Pyrimidine. All RNA molecules use Uracil instead of Thymine.
Transcription is the first step in the process of making proteins. It occurs in the nucleus of eukaryotes and in the cytoplasm of prokaryotes.
Something important to note about this process is the fact that a base called Uracil, or U, is exchanged for Thymine during transcription. Its chemical makeup is similar to Thymine and it is also a Pyrimidine. All RNA molecules use Uracil instead of Thymine.
Transcription is the first step in the process of making proteins. It occurs in the nucleus of eukaryotes and in the cytoplasm of prokaryotes.