Lab Practical: BIOS 242 / BIOS242 (Latest 2024/ 2025 Update) Microbiology| Questions and Verified Answers| 100% Correct| Grade A- Chamberlain
Lab Practical: BIOS 242 / BIOS242 (Latest
2024/ 2025 Update) Microbiology| Questions
and Verified Answers| 100% Correct| Grade
A- Chamberlain
Q: the bacterial cell wall that has thick peptidolgycan with small amounts of teichoic acid and
lipoteichoic acid will be classified as
Answer:
gram positive
Q: what are the three specific safety precautions we take in microbiology labs
Answer:
wear gloves, wipe down everything, no drinks/food
Q: why are the bacteria samples stored in the fridge?
Answer:
decrease bacterial growth
Q: as a result of gram staining, the gram positive cells will look , and the gram negative
cells will look
Answer:
purple, pink
- the microbial cultures plates generated in the science lab are discarded in
Answer:
biohazard bag
Q: stains are used viewing samples under microscope to increase
Answer:
resolution and contrast
Q: s epidermidis is
Answer:
gram positive, cocci shaped bacteria living as integumentary flora
Q: ocular lens
Answer:
Q: the microorganism with the lowest hazard level that can be handled in the lab belong to
Answer:
biosafety level 1
Q: the cells responsible for specific immune response/third line of defense are
Answer:
lymphocytes
Q: the objective lens mostly required to view the shape of bacteria is
Answer:
40x
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what test is performed to test microbial sensitivity to different antibiotics? kirby beuer test
what are the three shapes of bacteria? cocci, bacilli, spirilla
what are the sterilizing condition in a steam autoclave? 121 celsius at 15 psi for 15 min
what part of the microscope is used to adjust the amount of light entering the sample? aperture
microbiology is the study of microorganisms that are best defined as too small to be seen with the unaided eye
inflammation and fever are part of which line of defense second line of defense
what are the four major steps of gram staining crystal violet, grams iodine solution, alcohol, safranin
what is the reaction/color of gram negative bacteria when crystal violet is applied? purple
what is the reaction/color of gram negative bacteria when gram iodine is applied? dye fixer
what is the reaction/color of gram negative bacteria when alcohol is applied decolorize, clear
what is the reaction/color of gram negative bacteria when safranin is applied? pink
the bacterial cell wall that has thick peptidolgycan with small amounts of teichoic acid and lipoteichoic acid will be classified as gram positive
what are the three specific safety precautions we take in microbiology labs wear gloves, wipe down everything, no drinks/food
why are the bacteria samples stored in the fridge? decrease bacterial growth
as a result of gram staining, the gram positive cells will look , and the gram negative cells will look purple, pink
the microbial cultures plates generated in the science lab are discarded in biohazard bag
stains are used viewing samples under microscope to increase resolution and contrast
s epidermidis is gram positive, cocci shaped bacteria living as integumentary flora
ocular lens
the microorganism with the lowest hazard level that can be handled in the lab belong to biosafety level 1
the cells responsible for specific immune response/third line of defense are lymphocytes
the objective lens mostly required to view the shape of bacteria is 40x
gram negative bacteria like salmonella and campylobacter cause infection of digestive enzyme
if the total magnification of a specimen is over 900x, what is the magnifying power of the objective lens if the ocular lens is 10x 90x
what are five different ways in which healthcare professional can spread microbes between patients? not washing hands, not sanitizing properly, not using gloves, using contaminated equipment, not wearing a mask and coughing, using unsafe injection practices
antibiotic penicillin belongs to the category of cell wall synthesis inhibitors
the cells switch to using fermentation in the _ to continue the production of ATP presence of oxygen
the use of a physical or chemical process before and after every use of lab work bench is called disinfection
microorganisms can be grown in a temperature controlled chamber called an incubator