18 Questions
What is the purpose of an inoculating loop?
To transfer bacteria for culturing
What is the main use of a hanging drop slide?
To observe the motility of bacteria
Why is an incubator important in scientific experiments?
To provide controlled temperature for growing cultures
What is the function of fermentation tubes?
To collect gas formed in broth cultures
Which of the following is a commonly used accessory with glass slides for microscopic examination?
Cover slip
In what activity can an ERLENMEYER FLASK be most helpful?
Mixing, pouring, and storing chemicals
What is the primary use of a magnetic stirrer in a laboratory setting?
Create a rotating magnetic field
In what equipment would you typically culture cells like bacteria?
Petri dish
What is the main function of a test tube rack in a laboratory?
Hold multiple test tubes upright
Which equipment is specifically designed for storage or transport due to its leak-tight screw caps?
Test tube with screw
What is the primary purpose of glass slides in a laboratory setting?
Hold liquids for observation
What is the desired outcome of using fermentation tubes in a laboratory experiment?
Observe gas production during fermentation
What is the function of an autoclave?
Sterilize equipment using steam
Which laboratory device is used for the separation of fluids based on density?
Centrifuge
What is the purpose of autoclave tape in autoclaving?
Indicating whether a specific temperature has been reached
What type of container is a beaker typically used for in laboratories?
Mixing chemicals and liquids
What is the main function of centrifuge tubes?
To analyze and separate various materials
In a laboratory setting, what are droppers commonly used for?
Measuring and transferring liquids in small amounts
Study Notes
Laboratory Equipment
- Droppers are used to measure and transfer liquids in small amounts, consisting of a long tube with an opening at the end and a rubber bulb at the top.
- Erlenmeyer flasks are designed for mixing, pouring, and storing chemicals, featuring a flat bottom that prevents spills and a wider base than top for storing chemicals.
Containers and Tubes
- Fermentation tubes are modified culture tubes with an upright closed arm for collecting gas formed by microorganisms in broth cultures.
- Glass slides are thin, flat pieces of glass (75 x 26 mm, 1 mm thick) used to hold objects for examination under a microscope, often with a cover slip or cover glass.
- Hanging drop slides are a type of wet mount used to observe motile bacteria in dark illumination.
- Test tubes with screw caps are available in various sizes, designed to be leak-tight for storage or transport.
- Centrifuge tubes are cylinder-shaped, calibrated glass containers used for separating fluids or gases based on density.
Heating and Sterilization
- Alcohol lamps serve as a source of heat for laboratory activities.
- Autoclaves use steam to sterilize equipment and objects, inactivating bacteria, fungi, and viruses.
- Autoclave tape is an adhesive tape that changes color after exposure to high temperatures, indicating that sterilization has been achieved.
Measurement and Mixing
- Beakers are cylindrical containers used to mix chemicals, liquids, and substances, also used to calculate volumes of various liquids.
- Applicator sticks are used to mix small amounts of different materials together.
- Magnetic stirrers create a rotating magnetic field to stir liquids.
Centrifugation and Weighing
- Centrifuges are laboratory devices that separate fluids, gases, or liquids based on density using high-speed spinning.
- Centrifuge tubes are used in centrifuges for analysis and separation of various materials.
- Weighing scales are used to determine the weight or mass of a sample, available in various sizes and resolutions.
Petri Dishes and Racks
- Petri dishes are shallow, cylindrical glass or plastic lidded dishes used to culture cells, such as bacteria, or small mosses.
- Test tube racks are laboratory equipment used to hold upright multiple test tubes simultaneously, ensuring safety and ease of transport.
Test your knowledge on the main dropper and Erlenmeyer flask with this quiz. Learn about the uses and history of these laboratory tools that are essential for accurate measurements and chemical handling.
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