BIOS242 EXAMINATION 2026 VERIFIED
ANSWER COMPENDIUM
◉Differential Interference Contrast microscope. Answer: Like the
phase-contrast microscope, this microscope provides a detailed
view of unstained, live specimens by manipulating the light. But this
microscope has additional refinements, including two prisms that
add contrasting colors to the image and two beams of light rather
than one.
◉Simple fluorescence. Answer: The microscope is a modified
compound microscope furnished with an ultraviolet radiation
source. For an image to form, the specimen must first be stained
with a fluorescent dye. Illumination with ultraviolet radiation causes
the specimen to give off light that will form its image, usually an
intense color such as red against a black field.
◉Confocal fluorescence. Answer: This microscope uses a laser beam
of light to scan various depths in the specimen and deliver a sharp
image focusing on just a single plane.
◉Transmission electron microscope. Answer: This microscope
produces its image by transmitting electrons through the specimen.
ANSWER COMPENDIUM
◉Differential Interference Contrast microscope. Answer: Like the
phase-contrast microscope, this microscope provides a detailed
view of unstained, live specimens by manipulating the light. But this
microscope has additional refinements, including two prisms that
add contrasting colors to the image and two beams of light rather
than one.
◉Simple fluorescence. Answer: The microscope is a modified
compound microscope furnished with an ultraviolet radiation
source. For an image to form, the specimen must first be stained
with a fluorescent dye. Illumination with ultraviolet radiation causes
the specimen to give off light that will form its image, usually an
intense color such as red against a black field.
◉Confocal fluorescence. Answer: This microscope uses a laser beam
of light to scan various depths in the specimen and deliver a sharp
image focusing on just a single plane.
◉Transmission electron microscope. Answer: This microscope
produces its image by transmitting electrons through the specimen.
