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AP: CHAPTER 26: ORIGIN OF LIFE
AP: CHAPTER 26: ORIGIN OF LIFE

... 16. Why is taxonomy considered a work in progress? ___________________________________________________________________________ ___________________________________________________________________________ 17. What are two problems with the five kingdom system of classification? a. ____________________ ...
Transcription Networks
Transcription Networks

... polymerase complex acts on a number of genes while the transcription factors regulate changes in expression profiles of specific genes. The transcription factors when bound change the probability per unit time of RNA polymerase binding to the promoter to produce the mRNA. Transcription factors can a ...


... vegetative and competent states respectively. In the vegetative state, cells have too few ComK proteins to activate further comK gene expression, ensuring that the concentration of this protein remains low. By contrast, in the competent state, ComK is produced in large quantities, ensuring that the ...
p53
p53

... • Like unicellular organisms, the tens of thousands of genes in the cells of multicellular eukaryotes are continually turned on and off in response to signals from their internal and external environments. • Gene expression must be controlled on a long-term basis during cellular differentiation, the ...
Conservation and Diversification of Three
Conservation and Diversification of Three

... What is Myb ?  Myb is derived from “myeloblastosis”, which is a name for a specific type of leukemia.  This gene was first recognized as the v-Myb oncogene of the avian myeloblastosis virus.  Family of transcription factors containing 2 or 3 repeat sequences in the DNA-binding domain (Myb domain ...
Bill Nye Genes Video WKSHT
Bill Nye Genes Video WKSHT

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Bill Nye Genes Video WKSHT
Bill Nye Genes Video WKSHT

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DNA Reccombination
DNA Reccombination

... an identified function. ...
Name Date “Bill Nye: Genes” Video Worksheet 1. Where do your
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Bill Nye: Genes
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Structure and function of DNA
Structure and function of DNA

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The first midterm will consist of 20 four
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No Slide Title

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Messenger RNA reprogramming by spliceosome-mediated
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... for spliceosome recognition and splicing. A PTM with a 5′ splice site domain can trans-splice to a 3′ splice site in the target pre-mRNA (ii in Figure 5); a PTM with a 3′ splice site domain can trans-splice to a 5′ splice site in the target (iii); and finally, a PTM with dual 3′ and 5′ splice site d ...
Inherited Diseases PowerPoint
Inherited Diseases PowerPoint

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... is a set of overlapping clones or sequences from which a sequence can be obtained. The sequence may be draft or finished. A contig is thus a chromosome map showing the locations of those regions of a chromosome where contiguous DNA segments overlap. Contig maps are important because they provide the ...
The best-studied nuclear compartments are the
The best-studied nuclear compartments are the

... nucleolus contains approx. 30 fibrillar centres, each accommodating about four genes. Each active gene has associated with it 100±120 RNA pol I molecules (approx. 15000 engaged RNA pol I molecules per cell) synthesizing each primary transcript at a synthetic rate of approx. 2.5 kb/min. Given that ea ...
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slides

Figure 1: The “Central Dogma” of Biology
Figure 1: The “Central Dogma” of Biology

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... instead of deoxyribose; (2) RNA is generally single-stranded, not double-stranded; and (3) RNA contains uracil in place of thymine. - In transcription, segments of DNA serve as templates to produce complementary RNA molecules. - The genetic code is read three “letters” at a time, so that each “word” ...
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Primary transcript



A primary transcript is the single-stranded ribonucleic acid (RNA) product synthesized by transcription of DNA, and processed to yield various mature RNA products such as mRNAs, tRNAs, and rRNAs. The primary transcripts designated to be mRNAs are modified in preparation for translation. For example, a precursor messenger RNA (pre-mRNA) is a type of primary transcript that becomes a messenger RNA (mRNA) after processing.There are several steps contributing to the production of primary transcripts. All these steps involve a series of interactions to initiate and complete the transcription of DNA in the nucleus of eukaryotes. Certain factors play key roles in the activation and inhibition of transcription, where they regulate primary transcript production. Transcription produces primary transcripts that are further modified by several processes. These processes include the 5' cap, 3'-polyadenylation, and alternative splicing. In particular, alternative splicing directly contributes to the diversity of mRNA found in cells. The modifications of primary transcripts have been further studied in research seeking greater knowledge of the role and significance of these transcripts. Experimental studies based on molecular changes to primary transcripts the processes before and after transcription have led to greater understanding of diseases involving primary transcripts.
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