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Rna polymerases

RNA polymerase

(Science: enzyme molecular biology) An enzyme that polymerise ribonucleotides in accordance with the information present in dNA.

prokaryotes have a single enzyme for the three rNA types that is subject to stringent regulatory mechanisms. Eukaryotes have type I that synthesises all rRNA except the 5S component, type II that synthesises mRNA and hnRNA and type III that synthesises tRNA and the 5S component of rRNA.


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Re: Totipotent Stem Cell From Molecular Components

... protein is the average of the gene expression in # of strands of mRNA * 100. I am getting the protein this way. I take the results of PCR and put it in a test tube with RNA polymerases, Ribosomes, and other proteins that help with protein synthesis. I then ...

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by caters
Fri Aug 01, 2014 1:42 am
 
Forum: Cell Biology
Topic: Totipotent Stem Cell From Molecular Components
Replies: 2
Views: 3425

A question regarding PCR

... is how many base pairs the amplified product will have, but it's not clear to me how to answer it. When the two DNA strand separate and have polymerases amplifying them, won't the initial products have different lengths since there is this little acatttg sequence before the first primer position? ...

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by x555
Sat Jan 18, 2014 11:05 am
 
Forum: Molecular Biology
Topic: A question regarding PCR
Replies: 1
Views: 1470

Why is ATP rather than GTP, CTP or TTP the energy currency?

... soon as ATP was being used/produced a bit more than the others, a feedback loop set in, and it became dominant. Obviously, all 4 are used by DNA polymerases, and GTP is used by numerous receptor proteins. I'm not aware of much use for TTP or CTP, but GTP is prominent. So, as JackBean said: "(hint ...

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by BlahBlahBlah
Fri Jul 12, 2013 1:12 pm
 
Forum: Molecular Biology
Topic: Why is ATP rather than GTP, CTP or TTP the energy currency?
Replies: 5
Views: 6112

Re: question for evolutionary biologist.

... a cell's genetic information. During transcription, Enzymes called RNA polymerases build RNA molecules that are complementary to a portion of one strand of the DNA ...

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by scottie
Sat Aug 25, 2012 10:40 pm
 
Forum: Evolution
Topic: question for evolutionary biologist.
Replies: 26
Views: 28583

Help please with viruses?

... in its capsid? Does the capsid contain any enzymes? How does the virus enter the host cell? How is its genome replicated? Does it encode its own polymerases? Which ones? Where does it replicate its genome? Where is the virus assembled? How does it get out of the cell? How does it get to the kidneys? ...

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by leongs04
Tue Jul 24, 2012 4:13 am
 
Forum: Microbiology
Topic: Help please with viruses?
Replies: 2
Views: 2729
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