Transcription | Gene Expression | Lecture 7
ฝัง
- เผยแพร่เมื่อ 20 เม.ย. 2022
- The functional products of most known genes are proteins, or, more accurately, polypeptides. Polypeptide is just another word for a chain of amino acids. Although many proteins consist of a single polypeptide, some are made up of multiple polypeptides.
Genes that specify polypeptides are called protein-coding genes. during expression of a protein-coding gene, information flows from DNA → RNA → protein. This directional flow of information is known as the central dogma of molecular biology.
Non-protein-coding genes (genes that specify functional RNAs) are still transcribed to produce an RNA, but this RNA is not translated into a polypeptide. For either type of gene, the process of going from DNA to a functional product is known as gene expression.
Transcription
• Transcription is the first step in gene expression. It involves copying a gene's DNA sequence to make an RNA molecule.
• Transcription is performed by enzymes called RNA polymerases, which link nucleotides to form an RNA strand (using a DNA strand as a template).
• Transcription has three stages: initiation, elongation, and termination.
• In eukaryotes, RNA molecules must be processed after transcription: they are spliced and have a 5' cap and poly-A tail put on their ends. Transcription initiation To begin transcribing a gene, RNA polymerase binds to the DNA of the gene at a region called the promoter.
Basically, the promoter tells the polymerase where to "sit down" on the DNA and begin transcribing. Elongation Once RNA polymerase is in position at the promoter, the next step of transcription-elongation-can begin. Transcription termination RNA polymerase will keep transcribing until it gets signals to stop. The process of ending transcription is called termination, and it happens once the polymerase transcribes a sequence of DNA known as a terminator. #ProcessOfTranscription #CentralDogmaForGeneExpression #DNATomRNA
Thank you sooo much both maza aya h lecture lany ka or yad karny ka 😊😊
اللہ پاک آپ کے علم اور عمر میں مزید برکتوں کا نزول فرمائیں آمین
Thank you so much sir, lecture is so amazing you have explained very well
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Best lecture
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extremely easy explanation thank you sir
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Thnkuu ma notes ki vjah sa preshan thi thnkuuu
Sigma factor , which helps RNA Pol to attach with template stand.
Oh it means it's a prokaryotic transaction sir say it's eukaryotic transaction
Thank you so much for for explaining well i m too much poor in biology I can't understand anything in bio but the way you explaining things is just awesome thanks again for clearing my concepts sir..salute u i watched every video of yours..sir please may you make a one playlist of DNA recombinant technology series 🙏🏻
Jazakallah ❤
This transcription process is of eukaryotes or prokaryotes ?
This type of transcription happens in prokaryotes Or in eukaryotes?
Best explained
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Thank you sir.
Mashallah sir aap bahut aacha samjhate h
Allah aapko or nawaze
Seeing this lecture for revision t 2x.
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Sukhriya bhai
Thank You Sir ❤
Ye eukaryotic ya prokaryotic hai?
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Pathan
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Sir I liked to add something that hydrogen bond never be double or triple there are 2 hydrogen bond in Adenine & Thymine and 3 bonds in Cytosin & Guanine.
Nice class
Is this for eukaryotes or prokaryotes???
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Sir growth and development k leacture upload kr dyn plz....Thank you
Mashallah ❤️❤️🤲
What about core enzyme and holoenzyme
Thanku
Nice
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geo sir❤
Kamal
Great sir
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@@jayprakashsharma881 G
If i write this explanation in exam for prokaryotes will i get marks?
Plz reply
Sir neurodegenerative disease ke bare me please kuch information de dijiye
Sir You can't tell how the RNA are formed in Elongation process.
Role of RNA in viruses and bacteria?? Plz explain this topic sir it's an humble request
Very very nice lecture
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okok
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سر اب کیا کہیں مزہ ہی آگیا 😍
اسلام علیکم !
Sir plz give a lecture on the "DNA Repair mechanism"
beautifully explained alhamdulillah
Jai Radha Krishna ❤
Sir agar DNA sa mRNA bnata he baqii krna kese bnate he?? Kaha bnte hh???
Nucleus m
Amazing 🤩🤩
Great lecture
Sir Mrna also a product of Dna like protein, r RNA, tRNA. Is it right sir ?
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Sir AP notes bi sth dy na huny asani hu ga
Sir transaction in prokaryotes ko btaiye
Ye sara process hamare ander hota rehta hai ?
Haan
Nice explanation sir
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Ap ne animals chapter nahi kiya sir
Just super explanation, may Lord ram bless u for it sir ❤
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जय श्री राम गुरु जी