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Introduction to Microorganisms Size

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Questions and Answers

What property of a microscope refers to the ability to produce separate images of closely placed objects?

Illumination

Resolution (correct)

Contrast

Magnification

Which type of microscope forms a dark image against a brighter background?

Phase contrast microscope

Bright-field microscope (correct)

Fluorescence microscope

Dark field microscope

What is the function of the oil in a microscope?

Increases the contrast

Reduces glare from light source

Improves magnification

Enhances the resolution power (correct)

What is used to improve the contrast in a microscope?

Staining the specimen (D) Signup and view all the answers

What is the total magnification of a field in a microscope if using a high power (40x) objective lens and an ocular lens with 10x magnification?

400x (A) Signup and view all the answers

Which part of a bright-field microscope holds various components such as the light source and adjustment knobs?

Base (A) Signup and view all the answers

What is the size range of most human pathogenic viruses?

20-300 nm (D) Signup and view all the answers

Which type of microorganism generally grows as hyphae?

Fungi (A) Signup and view all the answers

What is the typical diameter range of bacterial cells of medical importance?

0.2-1.5 μm (B) Signup and view all the answers

How do most fungi grow as per the text?

As hyphae (A) Signup and view all the answers

Which type of microorganism requires an electron microscope for visualization?

Viruses (C) Signup and view all the answers

What is the typical size of yeasts, a form in which some fungi grow?

4-8 μm (C) Signup and view all the answers