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    DNA Structure Sample Essay

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    * Subcomponents of Deoxyribonucleic acid are called DNA bases* DNA base composed of: phosphate group. deoxyribose sugar.

    and one of four nitrogen-bearing bases* Four nitrogen-bearing bases ( base of base ) is made of:PURINES A and G( dual II ( ternary III complimentary baseH bond ) II H bond ) III partner offing PYRAMIDINES T and C

    Deoxyribonucleic acid is dual isolated and each strand is composed of bases where the sugar of one base is covalently bonded to the phosphate group of the following base. * Each strand of DNA is composed of bases covalently linked:– Bases are read in groups of three– Send direction for cell– Switch cistrons on and off– Make proteins and enzymes


    Deoxyribonucleic acid is described as holding two antiparallel strands because the two strands are aligned in opposite waies. In a double-stranded Deoxyribonucleic acid molecule there is a sugar phosphate anchor outside and the base on the inside Chapter 3. 4: Deoxyribonucleic acid reproductionDeoxyribonucleic acid reproduction doubles the measure of DNA and besides ensures that there is an exact transcript of each Deoxyribonucleic acid molecule. Two of import molecules for DNA reproduction:– enzymes ( including helicase and DNA polymerase )– free bases ( non yet bonded )Helicase = enzyme that initiates separation into two individual strands.

    It breaks down H bonds so that there becomes two separate DNA strands. Each individual strand can now be used to retroflex the original two-base hit stranded DNA molecule.


    When bing DNA strands are used as a templet for new strands of DNA. it makes usage of complementary base coupling as the split forms two complementary strands.

    Deoxyribonucleic acid reproduction is called semiconservative as each ensuing DNA molecule is really an “old” strand now paired with a “new” strand. therefore no DNA molecule is of all time wholly new.

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