#1
Which type of microscope uses a beam of electrons to create an image?
Optical microscope
Scanning electron microscope
Transmission electron microscope
Fluorescence microscope
#2
What is the function of the objective lens in a microscope?
To collect light from the specimen
To magnify the image
To focus the electron beam
To adjust the contrast
#3
What is the function of the ocular lens in a microscope?
To collect light from the specimen
To magnify the image
To focus the electron beam
To adjust the contrast
#4
What is the purpose of a condenser in a microscope?
To focus the electron beam
To collect and direct light onto the specimen
To magnify the image
To adjust the contrast
#5
What is the primary function of the objective lens in a microscope?
To collect light from the specimen
To magnify the image
To focus the electron beam
To adjust the contrast
#6
What is the primary purpose of staining specimens in light microscopy?
To enhance contrast and visibility of structures
To reduce resolution
To decrease magnification
To minimize image distortion
#7
What is the main principle behind fluorescence microscopy?
Detection of electron density variations
Illumination by ultraviolet light
Labeling specimens with fluorescent dyes
Using polarized light
#8
In a light microscope, what is the function of the condenser?
To focus the electron beam
To collect and direct light onto the specimen
To magnify the image
To adjust the contrast
#9
What is the function of a magnification changer in a microscope?
To adjust the brightness of the image
To change the depth of field
To adjust the focus
To change the level of magnification
#10
Which type of microscope is commonly used for observing live cells in culture?
Scanning electron microscope
Confocal microscope
Phase-contrast microscope
Atomic force microscope
#11
What type of microscopy would be most appropriate for studying the surface features of a material at high resolution?
Fluorescence microscopy
Transmission electron microscopy
Scanning electron microscopy
Phase-contrast microscopy
#12
Which microscope technique is suitable for observing dynamic processes in living cells?
Fluorescence microscopy
Scanning electron microscopy
Phase-contrast microscopy
Transmission electron microscopy
#13
What is the resolving power of a microscope?
Its ability to magnify the specimen
Its ability to distinguish between two points as separate
The intensity of the light used
The depth of field
#14
Which microscopy technique is best suited for observing the internal structure of cells?
Confocal microscopy
Phase-contrast microscopy
Transmission electron microscopy
Scanning electron microscopy
#15
What is the primary advantage of phase-contrast microscopy?
Enhances contrast without staining
Provides high-resolution images
Allows for 3D imaging
Enables observation of nanoscale structures
#16
What is the primary limitation of electron microscopy compared to light microscopy?
Lower magnification capabilities
Inability to observe live specimens
Requires staining of specimens
Cannot provide color information
#17
What is the primary advantage of confocal microscopy over conventional fluorescence microscopy?
Higher resolution
Ability to perform 3D imaging
Faster image acquisition
Requires less specialized equipment
#18
What is the primary difference between light microscopy and electron microscopy?
Light microscopy uses photons, while electron microscopy uses electrons.
Electron microscopy uses photons, while light microscopy uses electrons.
Light microscopy uses radioactive isotopes, while electron microscopy uses heavy metals.
Electron microscopy uses radioactive isotopes, while light microscopy uses heavy metals.