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Questions and Answers
What is the primary reason that microorganisms cannot be seen with the naked eye?
What is the primary reason that microorganisms cannot be seen with the naked eye?
- They require culture media to grow
- They exist inside the body
- They have a very simple structure
- They are usually small in size (correct)
Which medium of microorganisms contains 0.5% agar?
Which medium of microorganisms contains 0.5% agar?
- Semi-solid medium (correct)
- Liquid medium
- Broth medium
- Solid medium
What is the purpose of using culture medium in microbiology?
What is the purpose of using culture medium in microbiology?
- To incubate microorganisms at room temperature
- To provide the nutrients necessary for growing microorganisms in vitro (correct)
- To see cells under a microscope
- To cause diseases in humans
According to the image, during which stage do colonies grow on the surface and within agar?
According to the image, during which stage do colonies grow on the surface and within agar?
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Microbiology primarily deals with which of the following?
Microbiology primarily deals with which of the following?
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Which of the following is NOT a use of microorganisms according to the given text?
Which of the following is NOT a use of microorganisms according to the given text?
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Study Notes
Introduction to Microbiology
- Microbiology is the study of living microorganisms, also known as microbes, which are small in size and cannot be seen with the naked eye.
- Microorganisms include bacteria, fungi, and viruses.
- Microorganisms can be observed under a microscope (micromorphology) or as colonies on culture media (macromorphology).
Culture Media
- Culture media is the nutrients or substances required for growing microorganisms in vitro (outside the body).
- There are three types of culture media: solid (agar 2%), semi-solid (agar 0.5%), and liquid (broth, no agar).
Importance of Microorganisms
- Microorganisms are the cause of many diseases.
- Some microorganisms are used in the manufacture of antibiotics, flavors, pigments, fermentation, and foodstuffs.
Microbiology Lab Practice
- A microbiology lab practice involves various stages, including:
- Molten agar preparation
- Preparation of a bacterial suspension
- Inoculation of a petri dish with the bacterial suspension
- Incubation of the petri dish
- Growth of colonies on the surface and within the agar
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