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Cupping Brokaryouc IRNA increas 4L stabititv] IRNA docs NOT need cap O54 poly-A ail ( HEtelomcres prescnt poly-A Lails are not needed ( Exons and introns are mosuy...

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Cupping Brokaryouc IRNA increas 4L stabititv] IRNA docs NOT need cap O54 poly-A ail ( HEtelomcres prescnt poly-A Lails are not needed ( Exons and introns are mosuy preseut in cukaryotic DNA ( During mRNA proccssing i prokaryotcs. only Lwo snRNP subunits are rcquired for sphcingTranscnption takes place in the cytoplasm, while translation takes place in the nucleus (12.Poly-A tails decrease Gtability and hfe span of cukuryotic RNA ( 13 . The initiation stage of translation requires cnergy ftom G

Cupping Brokaryouc IRNA increas 4L stabititv] IRNA docs NOT need cap O54 poly-A ail ( HEtelomcres prescnt poly-A Lails are not needed ( Exons and introns are mosuy preseut in cukaryotic DNA ( During mRNA proccssing i prokaryotcs. only Lwo snRNP subunits are rcquired for sphcing Transcnption takes place in the cytoplasm, while translation takes place in the nucleus ( 12.Poly-A tails decrease Gtability and hfe span of cukuryotic RNA ( 13 . The initiation stage of translation requires cnergy ftom GTP hydrolysis (



Answers

Eukaryotic mRNA: a. uses snRNPs to cut out introns and seal together translatable exons. b. uses a spliceosome mechanism made of DNA to recognize consensus regions to cut and splice. c. has a guanine cap on its $3^{\prime}$ end and a poly(A) tail on its $5^{\prime}$ end. d. is composed of adenine, thymine, guanine, and cytosine. e. codes the guanine cap and poly(A) tail from the DNA template.

Okay, sir, Corey ah, tick um or okay splices and then seals Exxon's together Okay, watching answer option A.

Transcription refers to the copying off the DNA into its are in a format so are on a plane. Rays will unwind DNA and will make a copy of that, um, by adding nucleotides to the new sequence so it produces Onley m r name. I said a seems correct, but let's just go through the other options. Um, it does. It does not require grabs homes rival something deeper for translation where the protein is made. It does not require TR in a either. That is also at the translation part. It produces m r April Zarni going from the five prime into this repayment? Um well, well, it does produce are in a it is not growing or any from the five time into this repairman. It's simply adding the nucleotides to a certain point when there's a stop sequence and it does not only take place in UK yards, it also happened that prokaryotes. Um, so the correct answer is that it only produces em already. Thank you for watching, and I hope this helps

This'll question which correctly list the changes to eukaryotic pre m r Nate to form M R. Well, we know that, of course. Um, Dia, it starts out in the beginning, and then it must be transcribed into em. Arnett. And before I m r a can go on to the process of translation into protein this m r in a must be processed. And by processing, we refer to the fact that pre m r must be converted into Marnie. And this conversion requires three things requires a, um five prime camp to be added, a three prime poly a tail to be added. And it requires that we excise or slice out our entrance because we need to only have our exons left in our Marnie. So the option that could correctly list all these will be option. Ah, let's see here. Let's see what option? A cap added Insurance exiles and Polly Tito. Okay, So this is where we are seeing a problem here. The poly detail is not going to be relevant because we're talking about only a poly a tail. As you can see right here the poly a tail must be out of them There's no such Polly detail that is added So choice bees also incorrect. We need to add a cap. Insurance must be excised. Yeah, in poly a tail that so it looks like choice sees the correct answer and choice d is incorrect because it says that the exons must be excised. And we know that the entrance must be excised due to the fact that the introns are going to be this junk DNA were Amarna in this case, but they're non coding, so choice sees the correct answer.

In this problem we're going to compare and contrast gene expression in two different domains of organisms. So eukaryotic organisms and pro periodic organisms which are bacteria and archaea. There are a lot of things that are preserved between the gene expression in these two. But there are also several things that are different. We're going to split up what's different between them. First. Pro charismatic cells use the type of organization for their genes called an opera on And in an opera on the pro Cariou has multiple genes uh that follow a single promoter and that means that these are multiple genes for multiple polly peptides that are going to get transcribed at the same time. Uh We call this being Polly's histrionic and I put a couple of classic opera fans here just so you know what their names are lack and trip By contrast eukaryotic gene expression is usually one gene that expresses or codes for one single polyp peptide. So there is not a policy S tronic organization. One thing that you carry, Oh do do. However the precarious don't is M. RNA processing. So M RNA processing is a series of steps that are going to help the marin a get out of the nucleus. They're going to signal that it's done. Being transcribed are created and the pro carrier doesn't have this problem because it doesn't have a nucleus so it can translate the MRNA. As soon as it is created, The three steps of Mrna processing include adding a five prime cap, adding a three prime tail and the tail is a bunch of A's. Sometimes it's called the poly A tales because of all the dentist scenes that get added and we're going to go ahead and cut out in trans, which are little pieces of non coding DNA that gets placed out of the eukaryotic genome. So when our problem asks us about eukaryotic gene expression, our answer is D because you carry outs do not usually have opera fans. They are you not polish histrionic? That's a pro chaotic thing that's for bacteria and archaea and their unique type of gene expression.


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