13dna (1) - Lecture 13: Discovering DNA Chapter 21: DNA...

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Lecture 13: Discovering DNA Chapter 21: DNA Structure and Function
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The Big Picture What is the structure of DNA ? How do we know? Who discovered DNA?
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Deoxyribonucleic Acid DNA is genetic material Found in the nucleus of eukaryotes Also in mitochondria
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3 Requirements of Genetics 1.) Genetic material must store information A unique set of data is required both to unify and diversify a species
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3 Requirements of Genetics 2.) Genetic material must replicate reliably To pass genetic information to the next generation
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3 Requirements of Genetics 3.) Genetic material must be able to mutate Possibly to introduce a favourable adaptation into the species
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Nucleotide Monomers Nucleotides are the simple building blocks of DNA Three components: 1.) Phosphate group 2.) Deoxyribose sugar 3.) Nitrogenous base
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Nitrogenous Bases Nitrogenous: contain nitrogen Bases: give (high) basic pH in water
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Polynucleotide Structure Nucleotides covalently bond together to form a single strand Notice the backbone Where are the nitrogenous bases attached?
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This note was uploaded on 12/08/2011 for the course PRE-HEALTH 1150 taught by Professor Profs during the Spring '11 term at Niagara College.

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13dna (1) - Lecture 13: Discovering DNA Chapter 21: DNA...

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