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Bio 108 Chapter 10

by: Taylor Notetaker

Bio 108 Chapter 10 BSC 108

Taylor Notetaker
Troy University
GPA 3.8

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About this Document

Structure of DNA
Introductory Biology for Non Majors
christine yates
Class Notes
25 ?




Popular in Introductory Biology for Non Majors

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This 2 page Class Notes was uploaded by Taylor Notetaker on Thursday March 10, 2016. The Class Notes belongs to BSC 108 at University of Alabama - Tuscaloosa taught by christine yates in Spring 2016. Since its upload, it has received 11 views. For similar materials see Introductory Biology for Non Majors in Biology at University of Alabama - Tuscaloosa.


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Date Created: 03/10/16
Chapter 10 Structure of DNA DNA and RNA  ● Consist of chemical units called nucleotides which are joined by a sugar  phosphate backbone ● DNA has T­A and C­G  ● RNA has A­U and C­G DNA replication ● Watson  and Crick’s model suggest that DNA replicates by a template  mechanism ● DNA replication begins at specific sites called origin of replication on the double  helix  Replication  ● The process is fast and accurate  ● Only 1 in 1 billion bases are incorrectly paired which leds to mutations  Flow of Genetic Info ● DNA­RNA­Protein ● Transcription­ occurs in the nucleus, and DNA strand gets transcripted into RNA  ● Translation­ occurs in the cytoplasm and makes RNA get translated into protein   Mutations  ● Result from errors in DNA replication  ● Physical or chemical agents (mutagens) ● Contribute to the rich diversity in the living world and to evolution by natural  selection (good thing about mutations) ● Mutations can be good, bad, or have no change depending on many things  Unique Viral Characteristics 1. Contain no ATP 2. Contain either DNA or RNA (but not both) 3. Replication is only done by taking control of the host synthetic machinery  Viruses:  ● exhibit some characteristics of living organisms however they are not alive,  Plant Viruses  ● Can stunt growth and diminish plants yields  ● Can spread throughout the whole plant  Animal Viruses  ● Viruses that infect animals are common causes of diseases  ● AIDS­ (acquired immune deficiency syndrome) caused by HIV and treated with  the drug AZT  ● HIV is a retrovirus­ an RNA virus that reproduces by DNA molecules, it uses  reverse transcriptase  Emerging Viruses  ● Mutation of existing viruses  ● Spread to new species  ● Normally outbreaks of viruses immerge in 3rd world countries or in overcrowded  places where sanitation is poor.   


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