BIO 272 Medical Microbiology - Lab
Practical #1 Exam Questions and
Answers
Turbidity - Correct Answers -Cloudiness observed in nutrient broth
Biofilm, pellicle - Correct Answers -This may be seen floating on the top of the broth.
The film can also be called a ________
Sediment - Correct Answers -A mass of settled organisms at the bottom of the test tube
False - Correct Answers -True or false: It is possible to state positively that the test
tubes you are working with contain only a single species of organism
37 degress celcius - Correct Answers -What temperature are plates incubated at?
Binary fission - Correct Answers -The process of bacterial division
Minimum bacterial concentration (MBC) - Correct Answers -The lowest concentration
that completely kills all cells upon subculturing onto appropriate growth media, typically
2-4x the MIC of an antibiotic
Plates, kill bacteria - Correct Answers -Are MBC tests used in test tubes or plates and
do they kill or inhibit bacteria?
Analyte - Correct Answers -Molecule that indicates infection, pregnancy, high
cholesterol, etc.
Antibodies - Correct Answers -Produced by the immune system and bind to antigens
True - Correct Answers -True or false: All the cells in a colony are the descendants of
that single bacterial cell initially deposited on the surface of the agar and are genetically
identical
1 million - Correct Answers -In general, about how many cells must be present to make
a colony visible to the naked eye?
Isolated - Correct Answers -Colonies are considered ________ if they do not touch
each other
Practical #1 Exam Questions and
Answers
Turbidity - Correct Answers -Cloudiness observed in nutrient broth
Biofilm, pellicle - Correct Answers -This may be seen floating on the top of the broth.
The film can also be called a ________
Sediment - Correct Answers -A mass of settled organisms at the bottom of the test tube
False - Correct Answers -True or false: It is possible to state positively that the test
tubes you are working with contain only a single species of organism
37 degress celcius - Correct Answers -What temperature are plates incubated at?
Binary fission - Correct Answers -The process of bacterial division
Minimum bacterial concentration (MBC) - Correct Answers -The lowest concentration
that completely kills all cells upon subculturing onto appropriate growth media, typically
2-4x the MIC of an antibiotic
Plates, kill bacteria - Correct Answers -Are MBC tests used in test tubes or plates and
do they kill or inhibit bacteria?
Analyte - Correct Answers -Molecule that indicates infection, pregnancy, high
cholesterol, etc.
Antibodies - Correct Answers -Produced by the immune system and bind to antigens
True - Correct Answers -True or false: All the cells in a colony are the descendants of
that single bacterial cell initially deposited on the surface of the agar and are genetically
identical
1 million - Correct Answers -In general, about how many cells must be present to make
a colony visible to the naked eye?
Isolated - Correct Answers -Colonies are considered ________ if they do not touch
each other
