Lab+4+DNA


 * Exercise 1**: **The Enzymes of DNA Replication **

1. Topoisomerase  

2. Helicase 

3. Primase 

4. DNA polymerase  5. Ligase 

**Exercise 2: DNA Extraction**

Ethidium Bromide stains DNA and RNA florescent. The article I read said that Ethiduim Bromide eventually kills the RNA leaving behind only the DNA, so I am assuming that it is toxic in that it is abrasive and kills the RNA. [] Please note that these are all non toxic methods to determine whether the substance extracted is actually DNA. It is possible to stain DNA with positively charged cationic dye. The positively charged catatonic dye attracts the negatively charged DNA. DNA sticks to glass due to DNAs negative charge. The DNA should appear as very thin visible strands in the liquid. The DNA could also appear almost billowing or silky. Source: [] **DNA extraction from wheat germ**
 * DNA**

**EXERCISE 3. MITOSIS AND MEIOSIS **
Meiosis
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Mitosis