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RNA Structure
RNA Structure

... e. Is this DNA or RNA? This is DNA because you have thymine, which isn’t present in RNA. XXIII. What Are the Different Classes of Nucleic Acids? [S23] a. Two kinds of nucleic acids: i. DNA – only one type, only serves one purpose, which is storing your genetic information. ii. RNA – there are 4 diff ...
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... • The genetic code is a set of rules defining how the code of DNA nucleotides is translated into the code of amino acids. • Genetic code is universal between all organisms with few exceptions. ...
The Localization of PABPC1 in HeLa Cells
The Localization of PABPC1 in HeLa Cells

... an area called the promoter region. This indicates where RNA synthesis should begin. Once the RNA polymerase II is bound tightly to the DNA, it opens up the double helix conformation of the DNA to expose the DNA building blocks, or nucleotides, on each of the strands of DNA. The strands of DNA act a ...
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... Thymine nitrogenous base ...
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... d. Usually genes terminated this way have G-C rich region (red box) i. G-C region slows polymerase down ii. Pausing allows Rho to get on, catch up to transcription bubble iii. Using ATP energy, Rho will remove RNA polymerase from template strand, releasing nascent strand and itself. XXXIV. REGULATIO ...
Chapter 15 Outline - Adelphi University
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video slide - Your School

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NO!!!!!
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... Some proteins do more than 1 reaction mRNA for this transcript had half-life of about 3 min Has a normal repressor Trp repressor is a dimer When trp present, bind to repressor, repressor binds to operator Operator site overlaps promoter site so when bound can start transcription complex Simple on/of ...
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... 3. Given a DNA strand, be able to tell what the complementary mRNA strand would be 4. Compare and contrast DNA and RNA in terms of long name, type of sugar, number of strands, what part of the cell it is found in (nucleus and / or cytoplasm) and names of bases 5. Explain what is actually happening w ...
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... Scientists studying many different organisms, including petunia, soon discovered that this system of inactivating gene expression was a highly conserved mechanism. Furthermore, they found that the function of virtually all genes could be down-regulated through the RNAi mechanism simply by introducin ...
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(codons) make a specific amino acid

... Lets look at how the base sequence of mRNA is translated into an amino acid sequence before (original) and after we change the mRNA base sequence. Ultimately mutations to DNA are what change the mRNA sequence! 1) How many amino acids long is this protein? ...
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The Mechanism of Translation II

... Administration. The solution was created by the grantee and does not necessarily reflect the official position of the U.S. Department of Labor. The Department of Labor makes no guarantees, warranties, or assurances of any kind, express or implied, with respect to such information, including any info ...
Inquiry into Life Twelfth Edition
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... Transcription is catalyzed by RNA polymerase The enzyme that catalyzes RNA synthesis is called RNA polymerase. As in DNA replication, the nucleotide sequence of the RNA chain is determined by base pairing between incoming nucleotides and the DNA template. When a match is made, the incoming ribonucle ...
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8.4 Transcription

... Location of Protein Synthesis • Prokaryotic cells: replication, transcription, and translation all occur in the cytoplasm (remember there is no nucleus), at approx the same time • In Eukaryotic cells, where DNA is located inside the nucleus, these processes are separated by location and ...
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Polyadenylation



Polyadenylation is the addition of a poly(A) tail to a messenger RNA The poly(A) tail consists of multiple adenosine monophosphates; in other words, it is a stretch of RNA that has only adenine bases. In eukaryotes, polyadenylation is part of the process that produces mature messenger RNA (mRNA) for translation. It, therefore, forms part of the larger process of gene expression.The process of polyadenylation begins as the transcription of a gene finishes, or terminates. The 3'-most segment of the newly made pre-mRNA is first cleaved off by a set of proteins; these proteins then synthesize the poly(A) tail at the RNA's 3' end. In some genes, these proteins may add a poly(A) tail at any one of several possible sites. Therefore, polyadenylation can produce more than one transcript from a single gene (alternative polyadenylation), similar to alternative splicing.The poly(A) tail is important for the nuclear export, translation, and stability of mRNA. The tail is shortened over time, and, when it is short enough, the mRNA is enzymatically degraded. However, in a few cell types, mRNAs with short poly(A) tails are stored for later activation by re-polyadenylation in the cytosol. In contrast, when polyadenylation occurs in bacteria, it promotes RNA degradation. This is also sometimes the case for eukaryotic non-coding RNAs.mRNA molecules in both prokaryotes and eukaryotes have polyadenylated 3'-ends, with the prokaryotic poly(A) tails generally shorter and less mRNA molecules polyadenylated.
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