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Lesson 3
Lesson 3

... Ribonucleic Acid (RNA) • RNA is made in the nucleus from DNA • RNA is a single strand • RNA has the nitrogen bases A, G, C, and U (uracil) • The sugar-phospate backbone contains the sugar ribose ...
The Genetic Code
The Genetic Code

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AP Biology Final Exam Topics 2015
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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

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CP Biology Cumulative Final Exam Study Guide write all answers on
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Multiple Choice. ______1. Which of the following molecules
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2013 - (canvas.brown.edu).

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Ch.12 - Jamestown Public Schools
Ch.12 - Jamestown Public Schools

...  Translation - (protein synthesis) decoding an mRNA message into a polypeptide chain (protein)  It takes place on ribosomes  Before translation occurs, mRNA is transcribed (re-written) from DNA in the nucleus & released in the cytoplasm ...
No Slide Title
No Slide Title

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What does DNA do?

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S3. Effects of Mutations on Proteins – Formative

... 5) You have identified a previously unknown human gene that appears to have a role in autism. It is similar enough in DNA sequence to a known mouse gene that you believe that the two genes may be evolutionarily related. You determine and compare the DNA sequences, the predicted mRNA sequences, and ...
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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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