Update DNAEXTRACTION.md

DNAEXTRACTION.md

@@ -27,7 +27,9 @@ Please try to follow this list of tasks.
 9. Link the copied **Bacteria** to **Experimental Step 1** as **Child**
 10. Create a DNA extraction protocol in the **Protocol Collection**
 11. Create an **Experimental Step 2** starting from **Experimental Step 1**, which should describe the DNA extraction
-12. Link the copy of the used **Bactiera** and the DNA extraction protocol as **Parent**
+12. Link the copy of the used **Bacteria** and the DNA extraction protocol as **Parent**
+13. Create a **DNA** entry and link it as **Child** to the **Experimental Step 2**
+14. 
 
 ### Resources