1. DNA REVIEW

2. The connecting pieces or “rungs” on a DNA ladder. NITROGEN BASES

3. Structure in the cell where chromosomes are located. NUCLEUS

4. The copying of a DNA molecule. REPLICATION

5. The other substance in addition to phosphates that make up the “handrails” of the DNA ladder. SUGAR

6. A section of DNA controlling the making of specific proteins. GENE

7. Scientist who used X-ray diffraction to determine that DNA was a helix. ROSALIND FRANKLIN

8. Heredity structures made up of DNA and protein. CHROMOSOMES

9. Substances that determine our physical appearance. PROTEINS

10. Scientist who worked with James Watson in developing the double- helix model of DNA. FRANCIS CRICK

11. The structure of a DNA molecule. DOUBLE HELIX

12. An organism’s informational code. DNA

13. Nitrogen base always paired with adenine. THYMINE

14. Nitrogen base always paired with guanine. CYTOSINE

15. An abnormality or deformation of an organism due to pollutants in the environment that affect the organism’s DNA. MUTATION

16. Repeating units of a sugar, phosphate, and a nitrogen base that create the DNA helix. NUCLEOTIDE

17. A chemical used to read the DNA in the nucleus which takes the message to the ribosomes where proteins are made. mRNA

18. Base that replaces thymine in messenger RNA (mRNA). URACIL

19. Besides viewing this slide show again... And again... And again, what else can you do to prepare for the quiz? Look over the handouts in your notebook focusing on the BOLD FACED words. Review the “What is DNA?” slide show on my teacher webpage.

20. DNA YOUR MAP OF LIFE!!