MICROBIOLOGY MIDTERM EXAM NEWEST 2024
WITH COMPLETE QUESTIONS AND CORRECT
VERIFIED ANSWERS (DETAILED ANSWERS)
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Define Micro- - ✔✔ANSWER✔✔->>>>>>>>Less than 1mm and
cannot see with the naked eye
Need a microscope to see
Microbes, microorganisms, germs, bugs
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.
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
Highest magnification for all light microscopes? -
✔✔ANSWER✔✔->>>>>>>>2,000X and 200 nm resolution
eubacteria - ✔✔ANSWER✔✔->>>>>>>>the common bacteria of
the 2 types. (-) WITH cell walls, (+) WITH cell walls, and no cell
wall (mycoplasm)
archebacteria - ✔✔ANSWER✔✔->>>>>>>>less common type of
bacteria. do not produce peptidoglycan and can live in extreme
environments
appendages - ✔✔ANSWER✔✔->>>>>>>>attached to bacteria on
one side, the other side is "free"
motility appendages - ✔✔ANSWER✔✔->>>>>>>>flagella and
axial filaments
flagella - ✔✔ANSWER✔✔->>>>>>>>for motility and self
propulsion. found mostly in gram negative bacteria. provide a
smooth forward movement
structure of flagella - ✔✔ANSWER✔✔->>>>>>>>made of protein
with 3 distinct parts: filament, hook, basal body (inside and has 4
rings and a rod that rotate)
axial filament - ✔✔ANSWER✔✔->>>>>>>>wrap around the cell
and cause spiral like movements. has only two parts: a long thin
microfibril inserted into a hook.
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