DNA Structure - Part 2.

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Presentation transcript:

DNA Structure - Part 2

Learning Objectives Describe the basic shape of DNA Name the three parts of a nucleotide

The Shape of the DNA Molecule The basic shape is like a twisted ladder called a double helix The DNA double helix has two strands twisted together

Components of DNA The DNA backbone is made of alternating phosphates and deoxyribose sugar The rungs are nitrogenase bases P Base Sugar Sugar Base P P Sugar Base Base Sugar P P Base Base Sugar Sugar P P Sugar Sugar Base Base P

Monomer of DNA or RNA Nucleotide DNA and RNA are made of monomers called nucleotides

Nucleotide Phosphate Nitrogenous Base Deoxyribose Sugar One deoxyribose sugar, one phosphate and one nitrogenous base make a nucleotide.

DNA Structure Amoeba Sisters YouTube Video DNA Structure Amoeba Sisters

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