Presentation on theme: "DNA Deoxyribonucleic Acid. The DNA Connection What have you learned about inheritance, DNA, and cell division up to this point? How do genes determine."— Presentation transcript:
Structure of DNA (Twisted Ladder – Double Helix) Nitrogen Bases Sugars Phosphates
The Sides of the “Ladder” Sugars and phosphates form the “backbone” of the DNA molecule. The name of the sugar is DEOXYRIBOSE.
The Rungs of the “Ladder” The DNA molecule is made up of four different nitrogen bases. * Adenine – Thymine * Cytosine – Guanine The bases attach to the sugar part of the DNA backbone (sides). The order of the bases form a genetic code that specifies what type of protein will be produced.
How Does it Work? DNA molecule “unzips” down the middle into two pieces. It breaks apart where the bases are joined. Extra bases are made in the cytoplasm. These bases pair up with the “free” bases. Two new complete DNA molecules form which are identical to the original DNA.