#1
What part of the microscope is used to adjust the amount of light passing through the specimen?
Diaphragm
ExplanationAdjusts light intensity passing through the specimen.
#2
Which part of the microscope holds the objective lenses and can be rotated to change magnification?
Nosepiece
ExplanationHolds objective lenses and facilitates magnification change.
#3
What is the function of the iris diaphragm on a microscope?
To adjust the intensity and size of the light beam
ExplanationControls light intensity and size for optimal illumination.
#4
Which microscope technique is commonly used for observing living cells in culture?
Phase-contrast microscopy
ExplanationCommonly employed for observing living cells in culture.
#5
Which part of the microscope is used to support the slide containing the specimen?
Stage
ExplanationSupports the slide containing the specimen.
#6
Which type of microscope is commonly used to observe live specimens?
Fluorescence microscope
ExplanationUtilized for observing live specimens by detecting fluorescence.
#7
What is the function of the coarse adjustment knob on a microscope?
To focus the specimen under low magnification
ExplanationUsed for initial focusing of specimen at low magnification.
#8
What is the purpose of immersion oil in microscopy?
To improve resolution
ExplanationEnhances resolution by reducing light refraction.
#9
Which microscope technique is commonly used to study the surface of a specimen in three dimensions?
Scanning electron microscopy
ExplanationUsed for 3D surface analysis of specimens.
#10
Which microscope technique relies on the bending of light to create contrast in transparent specimens?
Phase-contrast microscopy
ExplanationRelies on light bending for contrast in transparent specimens.
#11
What is the purpose of the mechanical stage on a microscope?
To hold and move the specimen
ExplanationFacilitates specimen manipulation and positioning.
#12
What is the purpose of the immersion objective lens on a microscope?
To enhance resolution
ExplanationEnhances resolution by reducing light refraction.
#13
Which microscope technique is used to observe internal structures of a specimen without staining?
Phase-contrast microscopy
ExplanationEnables visualization of internal structures without staining.
#14
What is the maximum magnification achievable with a light microscope?
1000x
ExplanationMaximum magnification attainable with a light microscope.
#15
What does the term 'resolution' refer to in microscopy?
The ability to distinguish between two adjacent objects
ExplanationCapability to differentiate between closely spaced objects.
#16
Which microscope technique utilizes a beam of electrons to visualize specimens?
Transmission electron microscopy
ExplanationUtilizes electron beam for specimen visualization.
#17
Which type of microscope is suitable for observing the detailed structure of cell organelles?
Transmission electron microscopy
ExplanationIdeal for detailed observation of cell organelles.
#18
What is the primary difference between a compound microscope and a stereo microscope?
Depth perception
ExplanationStereo microscope offers improved depth perception.
#19
Which microscope technique is best suited for observing fluorescently labeled molecules within a cell?
Fluorescence microscopy
ExplanationOptimal for observing fluorescently labeled molecules.