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DNA Structure PowerPoint Presentation
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DNA Structure - PowerPoint PPT Presentation

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DNA Structure
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  1. DNA Structure • Deoxyribonucleic acid- what is it? • Basic structure? • Base pairing rules state? • DNA is held together by what type of bond?

  2. DNA Structure-Bases

  3. DNA Structure-Chromosomes • The DNA is coiled in the nucleus in structures called

  4. Chromosome Structure

  5. DNA Replication • DNA must be passed from cell to cell. • The copying of DNA is called • Once the entire process is complete two _____________ strands of DNA are formed.

  6. DNA Replication

  7. Steps of DNA Replication • STEP 1: • DNA is unwound and hydrogen bonds are broken apart with the use of DNA helicase • STEP 2: • Two strands are separated by DNA polymerase. • STEP 3: • Complementary base pairs are brought to the parental strand from the 5’ to the 3’ end.

  8. Steps of DNA Replication • STEP 4: • DNA molecules are one part old strand one part new strand. • This is known as semi-conservative replication. • STEP 5: • Two identical strands of DNA are produced.

  9. DNA Replication Video • DNA replication is important, why? • DNA Replication video

  10. DNA Foldable • Fold paper into the shutter fold. • Color the DNA molecule pieces: • One color for phosphates • One color for deoxyribose sugar • One color for adenine • One color for thymine • One color for cytosine • One color for guanine • THE COLORS ALL NEED TO BE DIFFERENT!!!

  11. DNA Foldable • Cut out the molecules. • Pay attention to detail NEATNESS count! • Sequence must start ATG but the rest of the molecule is up to you. Make sure you do not match with any one else in class or you will receive a zero! • Using a piece of a post it, use the post it to represent a hydrogen base. • Add another color post it to represent DNA helicase and DNA polymerase.

  12. DNA Foldable • Inside the flaps, match up the appropriate base pairs to make a complementary strand for each of side of the DNA. • On the right hand flap, write the steps of DNA • On the left diagram mitosis and the cell cycle!