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Ist die DNA ein Polymer?
Im Falle der DNA-Polymerase ist das gebildete Polymer die Desoxyribonukleinsäure (DNA), als Monomere dienen Desoxyribonukleotide, genauer Desoxy-Nukleosidtriphosphate (dNTPs). Dieser Erhalt der DNA-Sequenz ist entscheidend für die Fähigkeit der DNA-Polymerase, die in der DNA codierte Erbinformation zu kopieren.
Was passiert bei der DNA Polymerase?
Die DNA-Polymerase (oder auch: DNA-abhängige DNA-Polymerase) ist ein Enzym, welches die Synthese von DNA aus Desoxyribonukleotiden an einer DNA-Matrize katalysiert. DNA-Polymerasen spielen eine Schlüsselrolle bei der DNA-Replikation.
What are the monomer units of DNA?
The monomer units of DNA are nucleotides, and the polymer is known as a „polynucleotide.“. Each nucleotide consists of a 5-carbon sugar (deoxyribose), a nitrogen containing base attached to the sugar, and a phosphate group.
Is DNA a protein or polymer?
Proteins are natural polymers made up of amino acids, and nucleic acids (DNA and RNA) are polymers of nucleotides — complex molecules composed of nitrogen-containing bases, sugars and phosphoric acid, for example. Subsequently, one may also ask, why DNA is a polymer?
What is a deoxyribonucleotide monomer?
Deoxyribonucleotides. To unpack this a bit, a deoxyribonucleotide monomer consists of three moieties—two that are fixed and one that is variable (and form the basis of the “information” that DNA encodes). The two fixed moieties are a phosphate group and a modified sugar group—deoxyribose, which is missing a hydroxyl group.
What is the structure of DNA like a staircase?
The sugar-phosphate backbones of the two DNA strands wind around the helix axis like the railing of a sprial staircase. The bases of the individual nucleotides are on the inside of the helix, stacked on top of each other like the steps of a spiral staircase.