Microbiology - Lab Quiz 2
The dye used as oxygen indicator in Fluid Thioglycollate Media (FTM) us Resazurin which turns colorless in _____
Absence of oxygen
The following statement is true:
Facultative anaerobes can grow throughout the tube
All microorganisms are pathogenic to humans
False
Suspended chunks in broth culture after incubation for 24 hours will be described as
Flocculents
Which gas combines with the oxygen left in the jar to form water molecules?
Hydrogen
The two gases evolved after a chemical reaction are
Hydrogen and carbon dioxide
What is the color of the dye used in indicator strip in gas pack jar?
Methylene blue
A patient is given an antibiotic for intestinal infection. After 5 days the patient develops a yeast infection. This is a typical example of an
Opportunist infection
Which is the catalyst in gas pack jar?
Palladium
Bacterial growth which looks as a film on top of the broth is called
Pellicle
A bacterial colony that has roots like extensions in its margin is called
Rhizoid
Gas pack jars can encourage growth of anaerobic sporulating bacteria
True
Mutualistic relationships can live in harmony, one benefiting from another
True
Can you check for pigment production in broth?
Yes
Bacteria that must have oxygen for metabolic activity is called ______
aerobe
Filiform growth on solid media are
colonies with a smooth round edge