Explain electron transport chain

Question

Problem:

Question 1 : Transfer of an F factor from F+ cell to F- cell makes recipient F+. Why doesn't this happen with Hfr cells?

Question 2: Krebs cycle, glycolysis, or electron transport chain. Can be used more than one

1. directly requires oxygen
2. releases co2
3. take place in the eukaryoticc cell cytosol
4. takes place in the mitochondrial matrix
5. takes place in the mitochondria
6. spilits the glucose molecule
7. takes place in the phospholipid bilayer
8. occurs before fermentation
9. produces ATP

Give reasoning with your answer.