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Laboratory Equipment: Magnetic Stirrer and Petri Dish

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Laboratory Equipment: Magnetic Stirrer and Petri Dish

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Questions and Answers

What is the primary purpose of an ERLENMEYER FLASK?

To observe bacteria
To mix, pour, and store chemicals (correct)
To hold objects for microscope examination
To collect gas formed by microorganisms

What distinguishes an ERLENMEYER FLASK from other flasks?

It is used to observe the motility of bacteria
It is used in dark illumination
It is made of glass slides
It has a flat bottom for easy placement and reduced spilling (correct)

What is the main function of a HANGING DROP SLIDE?

Observe the motility of bacteria over a long period without drying quickly (correct)
Hold objects for microscope examination
Collect gas formed by microorganisms
Mix, pour, and store chemicals

Which type of glassware is used to observe bacteria under a microscope?

GLASS SLIDES (B) Signup and view all the answers

What was the main contribution of Emil Erlenmeyer in the field of laboratory equipment?

Designing ERLENMEYER FLASK for mixing, pouring, and storing chemicals (D) Signup and view all the answers

How does an ERLENMEYER FLASK assist scientists in their work?

By providing a better way to mix, pour, and store chemicals (C) Signup and view all the answers

What is the function of a magnetic stirrer?

To stir liquids using a rotating magnetic field (A) Signup and view all the answers

What is the purpose of a Petri dish in a laboratory setting?

To culture cells and bacteria (B) Signup and view all the answers

What is the primary function of test tube racks in a laboratory?

To hold multiple test tubes upright (D) Signup and view all the answers

Which equipment is suitable for storage or transport of samples due to leak-tight screw caps?

Test tube with screw (C) Signup and view all the answers

What is the main purpose of a weighing scale in a laboratory?

To determine the weight or mass of a sample (A) Signup and view all the answers

What is the primary use of an inoculating loop in microbiology?

Transferring microorganisms for streaking (B) Signup and view all the answers

What is the mechanism through which a magnetic stirrer stirs liquids?

By creating a rapidly rotating magnetic field that makes a bar magnet rotate (B) Signup and view all the answers

Which material is commonly used to make a spatula for laboratory purposes?

Stainless steel (D) Signup and view all the answers

What is the primary function of a staining rack in a laboratory setting?

Simultaneous staining of microscope slides (C) Signup and view all the answers

Which laboratory tool is specifically designed for mixing chemicals and liquids?

Stirring rod (A) Signup and view all the answers

What is the purpose of a refrigerator in a laboratory setting?

Cooling samples or specimens for preservation (C) Signup and view all the answers

Which laboratory tool is used mainly by microbiologists to retrieve an inoculum from a culture of microorganisms?

Inoculating loop (B) Signup and view all the answers