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Chapter 5 - DNA deoxyribonucleic acid hereditary material...

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1 Chromosomes.j pg DNA deoxyribonucleic acid • hereditary material • double helix & polarity (5’ to 3’) is key to function as hereditary material • package in nucleus = chromosomes • visible during cell division • invisible most of the time DNA consist of two long polynucleotide chains (DNA strands) held together by H-bonds phosphate backbone has polarity - 5’ to 3’ four different bases - G, A, T & C form base pairs when in double helix deoxy… Unless indicated differently, a sequence is always written in the 5’to 3’ direction.
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