1. Standard 4 exon gene -Where is the polyA tail in the gene above? -Draw a 4 exon gene where exon 4 is all 3’UTR

2. Chapter 9 and some of 8 DNA and the Molecular Structure of Chromosomes

3. The Structures of DNA and RNA DNA is usually double-stranded, with adenine paired with thymine and guanine paired with cytosine. RNA is usually single- stranded and contains uracil in place of thymine.

4. When Do we Find RNA Mixed with The DNA? nucleoside = sugar +base nucleotide = sugar + base + phosphate

5. Ribonucleotide Reductase

6. Pyrimidines have the longer name and smaller base Purines have the shorter name and bigger base

8. Structure of a Polynucleotide Chain Why do we Always talk about DNA going in the 5’ to 3’ direction?

10. Deoxyribonucleotides What is dideoxyadenosine triphosphate (ddATP )? Why are dideoxynucleotides useful in Mol.Bio.?