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