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DNA : REPLICATION

DNA : REPLICATION. SOAR Charter Academy Mr. Najera. DNA?. Stands for : DEOXYRIBONUCLEAIC ACID. Structure of DNA. Discovered by James Watson and Francis Crick in 1953 with the help of Rosalind Franlin’s x-ray photography. DNA: Structure.

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DNA : REPLICATION

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  1. DNA : REPLICATION SOAR Charter Academy Mr. Najera

  2. DNA? • Stands for : DEOXYRIBONUCLEAIC ACID

  3. Structure of DNA • Discovered by James Watson and Francis Crick in 1953 with the help of Rosalind Franlin’s x-ray photography.

  4. DNA: Structure • DNA strands are tightly wound around proteins. These proteins support the structure. • Looks like a twisted ladder.

  5. “Sides of the Ladder” • Molecules of sugar called Deoxyribose alternating with molecules called phosphates. (salts)

  6. “Steps of the ladder” • Made up of four different nitrogen bases. (molecule paired with nitrogen) which pair up with a partner base. • ADENINE • THYMINE • GUANINE • CYTOSINE

  7. “Partner bases”-the steps of the ladder • ADENINE only with THYMINE • GUANINE only with CYTOSINE A-T and G-C

  8. REPLICATION-copying DNA • DNA unwinds like a zipper. • Nitrogen bases pair with their partners backwards. • Results in two exact copies of the original.

  9. REPLICATIONnew strands called complimentary strands.

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