BIOL3200 - METHODS FOR DETERMINING BACTERIAL
GROWTH EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS GRADED A++
Number of Cells, Total Mass, Cellular Products
3 Methods for Detecting Bacterial Growth
Direct Cell Count
Method of determining total number of cells; Does not distinguish between living and
dead cells
Direct Microscopic Count
Direct counting method that involves Petroff-Hauser Chamber which allows for a
number of cells to be measured in a known volume
Cell Counting Instruments
Direct counting method that counts cells in suspension as cells pass a counter in single
file; Measures changes in environment
Viable Cell Counts
Method used to quantify living cells; Includes plate counts, membrane filtration, most
probable numbers
Plate Counts
Method that measures viable cells growing on solid culture media; Based on
assumption that one or two cells give rise to one colony
GROWTH EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS GRADED A++
Number of Cells, Total Mass, Cellular Products
3 Methods for Detecting Bacterial Growth
Direct Cell Count
Method of determining total number of cells; Does not distinguish between living and
dead cells
Direct Microscopic Count
Direct counting method that involves Petroff-Hauser Chamber which allows for a
number of cells to be measured in a known volume
Cell Counting Instruments
Direct counting method that counts cells in suspension as cells pass a counter in single
file; Measures changes in environment
Viable Cell Counts
Method used to quantify living cells; Includes plate counts, membrane filtration, most
probable numbers
Plate Counts
Method that measures viable cells growing on solid culture media; Based on
assumption that one or two cells give rise to one colony
