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DNA - Midlakes
DNA - Midlakes

... know that if an enzyme named “M” is present than Curol is also present. ...
An artifact in studies of gene regulation using β
An artifact in studies of gene regulation using β

... strain of Escherichia coli H2331 (DlacU169) [4]. The modified strain, termed E. coli H2331 PfurAF–lacZ, weakly produced b-gal as determined by colony color (white vs. blue) on agar plates containing X-gal [5] and by the Miller assay (70 Miller units) [6], suggesting that PfurAF exhibited weak transcr ...
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Choose the BEST answer! Two points each. 1. Which of the
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... e. two of the above c. a putative gene 30. Luciferase is an enzyme responsible for mediating bioluminescence (glowing!) in certain organisms. When the luciferase gene is inserted alongside another foreign gene the investigator wishes to insert into a host cell, its expression in the host's phenotype ...
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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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