Laboratory Techniques in Microbiology
Biology ⇒ Microorganisms and Microbiology
Laboratory Techniques in Microbiology starts at 9 and continues till grade 12.
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See sample questions for grade 12
A student is asked to calculate the number of colony-forming units (CFUs) per mL in a sample. If 0.1 mL of a 10-4 dilution yields 50 colonies, what is the CFU/mL in the original sample?
A student is using a spectrophotometer to measure the turbidity of a bacterial culture. What is being estimated by this method?
A student observes red colonies on MacConkey agar after incubating a sample. What does this indicate about the bacteria?
A student prepares a smear that is too thick. What problem might this cause during microscopic examination?
Describe how you would prepare a bacterial smear from a solid culture for staining.
Describe the difference between selective and differential media.
Describe the main steps involved in the streak plate method for isolating pure bacterial colonies.
Explain the importance of using controls in microbiological experiments.
Explain why it is important to allow the agar surface to dry before inoculating with bacteria.
Explain why it is important to label Petri dishes on the bottom rather than the lid.
Explain why oil immersion is used with the 100x objective lens in light microscopy.
In the context of laboratory safety, what is the correct way to dispose of used bacterial cultures?
What is the main purpose of using a negative stain in microbiology?
What is the purpose of using a control plate in a microbiology experiment?
