1- Explain why some cells are pink and others are purple in Gram-stains bacteria smear.

2- Discuss how the techniques of the Five I’s of microbiology would be completed if your patient infection was due to protozoa, eukaryotic microbes.

3(a)-Compare and contrast the biosynthesis of the D.N.A virus with the R.N.A virus.

b.-Research the influence of biofilms in cystic fibrosis and the effect of antibiotic treatment