Answers to Difficult Questions in Lab #4

Question 2:

No, a small zone of inhibition around control disk will not invalidate theexperimentdue to possibility of contamination; also an important issue is that your comparison is performed against controls so the choice of control is an important step in designing experiments

Question 6:

The Petri dishes were incubated upside down in order to avoid condensation of water leading to bursting bacterial cells through osmosis

Article Question 1:

Superbug is a microorganism resistant to many antiseptics and antibiotics


Article Question 2:

An antibiotic or bacteriocide


Article Question 3:

Staphylococcus aureus

Article Question 10:

Wounds that have dead tissue due to lack of blood supply (example gangrins)