Dna structure
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DNA Structure - PowerPoint PPT Presentation

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DNA Structure. Deoxyribonucleic acid- what is it? Basic structure? Base pairing rules state? DNA is held together by what type of bond?. DNA Structure-Bases. DNA Structure-Chromosomes. The DNA is coiled in the nucleus in structures called. Chromosome Structure. DNA Replication.

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DNA Structure

  • Deoxyribonucleic acid- what is it?

  • Basic structure?

  • Base pairing rules state?

  • DNA is held together by what type of bond?

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DNA Structure-Chromosomes

  • The DNA is coiled in the nucleus in structures called

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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.

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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.

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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.

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DNA Replication Video

  • DNA replication is important, why?

  • DNA Replication video

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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


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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.

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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!