🔑Transcription is the process of synthesizing mRNA from a DNA template.
⚙️Transcription involves three main stages: initiation, elongation, and termination.
✂️In eukaryotes, pre-mRNA undergoes modifications, such as the addition of a poly-A tail and a cap.
🔗RNA splicing removes introns and joins exons to form a mature mRNA molecule.
🏭Transcription takes place in the nucleus of eukaryotic cells.
What is transcription?
—Transcription is the process of synthesizing mRNA from a DNA template. It is a crucial step in gene expression.
What are the three main stages of transcription?
—The three main stages of transcription are initiation, elongation, and termination. Each stage has specific molecular events.
What are the modifications that occur in pre-mRNA?
—Pre-mRNA undergoes modifications, including the addition of a poly-A tail and a cap, and RNA splicing to remove introns and join exons.
Where does transcription take place?
—Transcription takes place in the nucleus of eukaryotic cells. It occurs in the cytoplasm of prokaryotes.
Why is transcription important?
—Transcription is important because it is the first step in gene expression and helps create the mRNA template for protein synthesis.
00:00Transcription is the process of synthesizing mRNA from a DNA template.
00:25Initiation is the first stage of transcription, where RNA polymerase binds to the promoter region on the DNA.
01:43Elongation involves the addition of nucleotides to the growing mRNA strand, following base pairing rules.
02:48Termination signals the end of transcription, usually marked by a specific sequence called a terminator.
03:18In eukaryotes, pre-mRNA undergoes modifications, such as the addition of a poly-A tail and a cap.
03:58RNA splicing removes introns and joins exons, resulting in a mature mRNA molecule ready to leave the nucleus.
05:05Transcription takes place in the nucleus of eukaryotic cells.
