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Microscope Components and Microbial Culture Techniques Quiz

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#1

Which part of the microscope controls the amount of light passing through the specimen?

Condenser
Explanation

Controls light passing through specimen.

#2

What is the function of the coarse adjustment knob on a microscope?

To move the stage up and down
Explanation

Adjusts stage position.

#3

What is the function of a Petri dish in microbial culture?

To hold the culture medium and allow microbial growth
Explanation

Holds culture medium for growth.

#4

Which microbial culture technique involves the use of liquid media to grow bacteria?

Broth culture method
Explanation

Uses liquid media for bacterial growth.

#5

Which microbial culture technique involves the use of a loop to streak bacteria onto an agar plate?

Streak plate method
Explanation

Streaks bacteria onto agar plate.

#6

Which of the following is NOT a basic step in microbial culture techniques?

Sterilization
Explanation

Not a basic step.

#7

What is the purpose of a streak plate technique in microbiology?

To isolate pure bacterial colonies
Explanation

Isolates pure bacterial colonies.

#8

What does the acronym NA stand for in the context of microscope lenses?

Numerical Aperture
Explanation

Represents lens capability.

#9

Which microbial culture technique involves the dilution of a sample to obtain discrete colonies on agar plates?

Pour plate method
Explanation

Dilutes sample for discrete colonies.

#10

Which microscope technique is best suited for observing living cells in real-time?

Phase-contrast microscopy
Explanation

Observes living cells in real-time.

#11

Which microscope technique allows visualization of the internal structures of cells with high resolution?

Electron microscopy
Explanation

Visualizes internal cell structures with high resolution.

#12

What is the purpose of using a control group in microbial culture experiments?

To ensure the accuracy of the results
Explanation

Ensures result accuracy.

#13

What is the purpose of using immersion oil in microscopy?

To improve resolution
Explanation

Improves resolution.

#14

What is the purpose of a hemocytometer in microbiology?

To quantify bacterial cell concentration
Explanation

Quantifies bacterial cell concentration.

#15

Which microscope technique utilizes a laser to excite fluorescent dyes bound to specific cellular structures?

Confocal microscopy
Explanation

Uses laser for fluorescent dye excitation.

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