Bacterial Enumeration Quiz

What is the primary purpose of enumerating bacteria in a sample?

• To determine the color of the bacteria

• To assess the sanitary quality of the sample

• To identify the species of bacteria

• To measure the temperature of the sample

Which method counts only the viable cells in a bacterial sample?

• Viable Cell Count

• Direct Microscopic Count

• Total Cell Count

• Most Probable Number

What is a disadvantage of the plate count method?

• It is very quick and efficient

• It can count all cells, living or dead

• It requires serial dilutions for accurate results

• It can be used for heat-sensitive organisms

What is the purpose of using a filtration method in bacterial enumeration?

• To retain bacteria from a large sample

• To count motile bacteria accurately

• To determine the color of the sample

• To measure large quantities of bacteria

What does the Most Probable Number (MPN) method primarily measure?

• Bacteria that grow on solid medium

• The total number of bacteria in a sample

• Bacteria that do not grow on solid medium

• The weight of bacterial cells

What is a key advantage of the direct microscopic count method?

• It can count motile bacteria easily

• It requires no incubation time

• It distinguishes between live and dead bacteria

• It is inexpensive and quick

Which indirect method of measurement uses a spectrophotometer?

• Metabolic Activity

• Turbidity

• Dry Weight

• Filtration

What does the dry weight method measure?

• The number of live bacteria only

• The metabolic activity of bacteria

• The turbidity of the sample

• The total weight of bacterial cells