1. Cell Reproduction
7th 16.3 DNA

2. DNA

3. DNA DNA – code that controls all the activities of a cell
DNA stands for deoxyribonucleic acid
Rosalind Franklin discovered a spiral form using X-rays
Watson and Crick determined the double helix form

4. DNA

5. DNA DNA is composed of nitrogen bases and sugar phosphate molecules.
Adenine and Thymine
Cytosine and Guanine
There is always a perfect amount of each pair.
Before mitosis, each strand separates to create a whole other DNA molecule.

6. DNA

7. DNA
Gene – section of DNA that controls the production of amino acids and proteins
Proteins are used to either build cells or work as enzymes
Proteins are made by ribosomes
Ribosomes receive messages from RNA.

8. DNA

9. DNA Mutation – a permanent change in genes caused by outside forces
Genetic disorders
Tay-Sachs, Huntingtons, Down Syndrome, Fragile X, hemophilia.

10. DNA