Transcription | Gene Expression | Lecture 7

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

[@MaryamFatima_KHR]

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

[@kamalachettri7760]

Thank you so much sir, lecture is so amazing you have explained very well

[@mirhamdan4047]

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❤ . Bht achi smjh ati sir ❤

[@maviamalik3724]

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[@asmitapuree2443]

This transcription process is of eukaryotes or prokaryotes ?

[@zoologywithjunaid8597]

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[@powerofknowledgeacademy]

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[@rushikeshdevre4975]

This type of transcription happens in prokaryotes Or in eukaryotes?

[@Ubaid-c9o]

Yes Sir
I am totally understand
Thank you very much

[@khalid1o900]

Ye eukaryotic ya prokaryotic hai?

[@talhajan-6642]

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Your teaching method is very easy and amazing

[@sukhman_21]

extremely easy explanation thank you sir

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[@Zoology_wallah_]

Sigma factor , which helps RNA Pol to attach with template stand.

[@nargishsheikh7717]

Oh it means it's a prokaryotic transaction sir say it's eukaryotic transaction

[@Suchitra_sahu_]

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[@tajubalti5822]

Thank you so much Sir 💖
Mola salamat rakhy Ameen 🤲🤲🤲

[@Ashokkumar-ov8js]

Thnkuu ma notes ki vjah sa preshan thi thnkuuu

[@Satisfyingsoul546]

Is this for eukaryotes or prokaryotes???

[@asmitapuree2443]

If i write this explanation in exam for prokaryotes will i get marks?
Plz reply

[@user-vm6ff8mf4g]

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[@Kidsvideo82]

Sir You can't tell how the RNA are formed in Elongation process.

[@suryanarayanpanda7252]

Sir Mrna also a product of Dna like protein, r RNA, tRNA. Is it right sir ?

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Jazakallah ❤

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Deeer mazedar mashallah

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Pathan

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Thank you so much sir

[@koneenzahrazahra8111]

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.

[@Pookie_Pikachu]

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Wallekum assalam Bhai thodi aur deepli padhi B sc level ka. 🇮🇳

[@AmnaKhurram-ut5hv]

Thank you sir.

[@ankitanand4021]

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What about core enzyme and holoenzyme

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v good jzakalah

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Role of RNA in viruses and bacteria?? Plz explain this topic sir it's an humble request

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Sukhriya bhai

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[@nadeemhasan-fp1vf]

Mashallah sir aap bahut aacha samjhate h
Allah aapko or nawaze

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[@AnchalPrajapati-e4r]

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[@cutiepielovekpop9749]

Sir agar DNA sa mRNA bnata he baqii krna kese bnate he?? Kaha bnte hh???

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Nucleus m

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Ye sara process hamare ander hota rehta hai ?

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Haan

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Sir plz give a lecture on the "DNA Repair mechanism"

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[@AwaisAhmed-fi8kj]

Is it for prokaryotes???

[@Curly_kshitizxreacts]

Yes

[@shivanigautam3980]

Sir apne esme sigma factor ka jikr nhi kiya kyu?

[@RaialiRaiali-ui8yz]

Sigma factor ko generally transcription factor kehty h jo unno nae initiation mae batya h .if you confused then use Google.

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geo sir❤

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Kamal

[@bhuneshwarinavratna2807]

Sir transaction in prokaryotes ko btaiye

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❤️From 🇮🇳

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जय श्री राम गुरु जी

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Very very nice lecture

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Sir AP notes bi sth dy na huny asani hu ga

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Thank u sir🙏❤

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beautifully explained alhamdulillah

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❤❤❤❤

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