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Introduction to DNA

Introduction to DNA. DNA stands for D eoxyribo N ucleic A cid. Nucleic Acids are large molecules that are found in every cell. DNA is the code that tells the cell which enzymes it needs to make. The enzymes tell the cell what to do. This is an electron microscopic picture of chromosomes.

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Introduction to DNA

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  1. Introduction to DNA DNA stands for DeoxyriboNucleic Acid

  2. Nucleic Acids are large molecules that are found in every cell

  3. DNA is the code that tells the cell which enzymes it needs to make. The enzymes tell the cell what to do. This is an electron microscopic picture of chromosomes

  4. DNA is made of smaller units called NUCLEOTIDES. Nucleotides are hooked together to make the strand of DNA

  5. There is a sugar/phosphate backbone with a nitrogenous base (or nucleic acid base)

  6. There are four nucleic acid bases in DNA • Adenine (A) • Thymine (T) • Cytosine (C) • Guanine (G)

  7. Each Nucleic Acid base attaches to the sugar part of the “backbone” This shows ADENINE attached to deoxyribose

  8. Once the nucleotides are made, they will be attached together to make a long strand. This “strand” is the DNA – the subunits are the nucleotides.

  9. KNOW THIS: A Nucleotide consists of the SUGAR (deoxyribose), a BASE (ATGC) and a PHOSPHATE group.

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