MICROBIOLOGY MIDTERM EXAM NEWEST 2024 WITH COMPLETE
QUESTIONS AND CORRECT VERIFIED ANSWERS (DETAILED
ANSWERS) ALREADY GRADED A+ 100% GUARANTEED TO PASS
CONCEPTS!!!
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.
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
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.
attachment appendages - ANSWER-fimbriae and pili
fimbriae - ANSWER-short appendages that allow bacteria to attach to bacteria
pili - ANSWER-long appendages are found in gram negative bacteria and are
useful when mating
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller trustednurse. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $24.99. You're not tied to anything after your purchase.
