TCDHA MICROBIOLOGY EXAMS SET 2026
PRACTICE QUESTIONS AND ANSWERS
FULL SOLUTION
●● What are the 5 groups of microorganisms studied?.
Answer: Bacteria--most famous
Virus--2nd
Fungus--3rd
Protozoa--some but few
Algae--not a human pathogen
●● What generates 1/2 of the O2 that we breathe and would make life
impossible without?.
Answer: Microbes
●● What is the smallest simplest single-celled organism?.
Answer: Bacteria
●● What is not a cell, can't live by itself and needs to invade a cell?.
Answer: Virus
●● What are the two different classification of fungus?.
,Answer: Molds and yeast--micro
Mushrooms--Macro
●● What is a mostly single-celled organism that is Animal like?.
Answer: Protozoa
●● What are parasites?.
Answer: Different organisms that range from worms, insects and
protozoa that need a host to survive
●● What are the different applied microbiology fields of study.
Answer: Immunology
Epidemiology--control spread of disease
Food Micro--relationship between bacteria, food and drink
Agriculture Micro--relationship between bacteria and crop
Industrial Micro--microbes to produce vitamins, AA, Enzymes, etc.
●● Eukaryotic cells are....
Answer: more complete
●● Prokaryotic cells are....
Answer: all micro organisms and lack a nucleus
,●● Characteristics of microorganisms.
Answer: Small size
Unicellular simplicity
High Growth rate
Adaptability
●● microscope.
Answer: instrument used for enlargement of small objects
●● simple microscope.
Answer: single lens and a few working parts. not strong
●● compound microscope.
Answer: 2 magnifying lenses, a visible light sours, a condenser which
collects light to direct toward the object
●● magnification.
Answer: capacity of an optical system to enlarge small objects
●● ocular lens.
Answer: one we look through. 10X
, ●● objective lens.
Answer: 4 different, 4X, 10X, 40X, 100X
●● What is resoltion?.
Answer: Capacity of optical systems to distinguish or separate 2
adjacent objects/points from each other. represents clarity of image
●● Types of microscope?.
Answer: Light--visible light, bright field, dark field, phase contrast, diff
interference
Ultraviolet--florescence
Electron--scanning, transmission
●● what type of microscope do we use in the lab?.
Answer: bright field light microscope
●● how does a microscope work?.
Answer: light source is on the bottom. The light travels from the lamp,
hits the condenser lents which collects light and points it toward the
object. the light passes through the objective lens and the real image of
the object forms behind the ocular lens. the image we see is the virtual
image after it asses through the ocular lens and is at the total
magnification
PRACTICE QUESTIONS AND ANSWERS
FULL SOLUTION
●● What are the 5 groups of microorganisms studied?.
Answer: Bacteria--most famous
Virus--2nd
Fungus--3rd
Protozoa--some but few
Algae--not a human pathogen
●● What generates 1/2 of the O2 that we breathe and would make life
impossible without?.
Answer: Microbes
●● What is the smallest simplest single-celled organism?.
Answer: Bacteria
●● What is not a cell, can't live by itself and needs to invade a cell?.
Answer: Virus
●● What are the two different classification of fungus?.
,Answer: Molds and yeast--micro
Mushrooms--Macro
●● What is a mostly single-celled organism that is Animal like?.
Answer: Protozoa
●● What are parasites?.
Answer: Different organisms that range from worms, insects and
protozoa that need a host to survive
●● What are the different applied microbiology fields of study.
Answer: Immunology
Epidemiology--control spread of disease
Food Micro--relationship between bacteria, food and drink
Agriculture Micro--relationship between bacteria and crop
Industrial Micro--microbes to produce vitamins, AA, Enzymes, etc.
●● Eukaryotic cells are....
Answer: more complete
●● Prokaryotic cells are....
Answer: all micro organisms and lack a nucleus
,●● Characteristics of microorganisms.
Answer: Small size
Unicellular simplicity
High Growth rate
Adaptability
●● microscope.
Answer: instrument used for enlargement of small objects
●● simple microscope.
Answer: single lens and a few working parts. not strong
●● compound microscope.
Answer: 2 magnifying lenses, a visible light sours, a condenser which
collects light to direct toward the object
●● magnification.
Answer: capacity of an optical system to enlarge small objects
●● ocular lens.
Answer: one we look through. 10X
, ●● objective lens.
Answer: 4 different, 4X, 10X, 40X, 100X
●● What is resoltion?.
Answer: Capacity of optical systems to distinguish or separate 2
adjacent objects/points from each other. represents clarity of image
●● Types of microscope?.
Answer: Light--visible light, bright field, dark field, phase contrast, diff
interference
Ultraviolet--florescence
Electron--scanning, transmission
●● what type of microscope do we use in the lab?.
Answer: bright field light microscope
●● how does a microscope work?.
Answer: light source is on the bottom. The light travels from the lamp,
hits the condenser lents which collects light and points it toward the
object. the light passes through the objective lens and the real image of
the object forms behind the ocular lens. the image we see is the virtual
image after it asses through the ocular lens and is at the total
magnification
