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Bios 2250 transcription notes

by: hw767714

Bios 2250 transcription notes Bios 2250

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Notes over DNA, RNA, and transcription
Genetics in Human Society
Dr. Sugiyama
Class Notes
Biology, Genetics
25 ?




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This 2 page Class Notes was uploaded by hw767714 on Friday April 22, 2016. The Class Notes belongs to Bios 2250 at Ohio University taught by Dr. Sugiyama in Winter 2016. Since its upload, it has received 10 views. For similar materials see Genetics in Human Society in Biology at Ohio University.


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Date Created: 04/22/16
BIOS 2250 – Chapter 9 notes  DNA stores genetic information. DNA is stored within the nucleus permanently.  RNA is a single strand copy of DNA containing slightly different features. RNA has a ribose sugar instead of the deoxyribose sugar in DNA. RNA contains a base called uracil instead of thymine.  RNA controls the gene expression while DNA stores the genetic information.  DNA and RNA are nucleic acids composed of nucleotides. Each nucleotide is composed of a sugar, base, and phosphate.  DNA stands for deoxyribonucleic acid.  RNA stands for ribonucleic acid.  Proteins are long chains of amino acids and are the products of genes.  Changes in the DNA may change the protein functions. This means that when a gene is altered or destroyed, the function of the protein is altered or destroyed.  Proteins can have a variety of shapes and functions. Since a protein is just folded chains of amino acids, the shape of a protein is specified by its amino acid sequence.  Protein synthesis is a series of chemical reactions where chemical bonds are formed and broken. This is done in two steps. Transcription processes DNA into mRNA. Translation processes mRNA into proteins.  There are three types of RNA. Messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). BIOS 2250 – Chapter 9 notes  Transcription of RNA occurs in three different stages. These stages are Initiation, elongation, and termination. The product of transcription creates pre-mRNA.  Large pre-mRNA molecules are composed of exons and introns.  Exons are nucleotide sequences that are transcribed and translated.  Introns are nucleotide sequences that are transcribed but not translated. The introns are snipped out to create the mRNA.


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