CAMPBELL BIOLOGY IN FOCUS 3RD EDITION
EXAMINATION TEST 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ Magnification. Answer: Ratio of an object's image size to its real size
◉ Resolution. Answer: Measure of the clarity of an image
◉ Contrast. Answer: Difference in brightness between the light and dark
areas of the image
◉ Cell theory. Answer: All living things are composed of cells; all cells
come from other cells; the cell is the basic structural and functional unit
of all living things
◉ Organelle. Answer: Membrane-enclosed structures within eukaryotic
cells
◉ Electron microscope (EM). Answer: Microscope that focuses a beam
of electrons through the specimen
, ◉ Scanning electron microscope (SEM). Answer: Microscope that uses
the electron beam scans the surface of the sample, usually coated with a
thin film of gold, which excites electrons on the surface, and these
secondary electrons are detected by a device that translates the pattern of
electrons into an electronic signal sent to a video screen
◉ Transmission electron microscope (TEM). Answer: Microscope that
aims an electron beam through a very thin section of the specimen, much
as a light microscope aims light through a sample on a slide, to study
internal structure of cells
◉ How big are cells, bacteria, organelles?. Answer: 1-100 micrometers
(µm)
◉ Cytology. Answer: Study of cell structure
◉ Biochemistry. Answer: Study of chemical processes of cells
◉ Cell fractionation. Answer: Technique in which cells are broken into
pieces and the different cell parts are separated
◉ Cytosol. Answer: Fluid portion of cytoplasm
◉ Chromosomes. Answer: Threadlike structures made of DNA
molecules that contain the genes
EXAMINATION TEST 2026 QUESTIONS WITH
ANSWERS GRADED A+
◉ Magnification. Answer: Ratio of an object's image size to its real size
◉ Resolution. Answer: Measure of the clarity of an image
◉ Contrast. Answer: Difference in brightness between the light and dark
areas of the image
◉ Cell theory. Answer: All living things are composed of cells; all cells
come from other cells; the cell is the basic structural and functional unit
of all living things
◉ Organelle. Answer: Membrane-enclosed structures within eukaryotic
cells
◉ Electron microscope (EM). Answer: Microscope that focuses a beam
of electrons through the specimen
, ◉ Scanning electron microscope (SEM). Answer: Microscope that uses
the electron beam scans the surface of the sample, usually coated with a
thin film of gold, which excites electrons on the surface, and these
secondary electrons are detected by a device that translates the pattern of
electrons into an electronic signal sent to a video screen
◉ Transmission electron microscope (TEM). Answer: Microscope that
aims an electron beam through a very thin section of the specimen, much
as a light microscope aims light through a sample on a slide, to study
internal structure of cells
◉ How big are cells, bacteria, organelles?. Answer: 1-100 micrometers
(µm)
◉ Cytology. Answer: Study of cell structure
◉ Biochemistry. Answer: Study of chemical processes of cells
◉ Cell fractionation. Answer: Technique in which cells are broken into
pieces and the different cell parts are separated
◉ Cytosol. Answer: Fluid portion of cytoplasm
◉ Chromosomes. Answer: Threadlike structures made of DNA
molecules that contain the genes
