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

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.?

12. I hate when DNA is not depicted properly!

13. 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