Microbiology Lab Practical 1 Latest Version Graded A+
5 views 0 purchase
Course
Microbiology Lab Practical 1
Institution
Microbiology Lab Practical 1
Microbiology Lab Practical 1 Latest
Version Graded A+
What is the purpose of using immersion oil with a 100x objective lens?
To reduce light refraction and improve resolution.
What is the correct way to sterilize an inoculating loop before use?
Heat it in the flame of a Bunsen burner unt...
Microbiology Lab Practical 1 Latest
Version Graded A+
What is the purpose of using immersion oil with a 100x objective lens?
✔✔To reduce light refraction and improve resolution.
What is the correct way to sterilize an inoculating loop before use?
✔✔Heat it in the flame of a Bunsen burner until it glows red.
What is the main purpose of a simple stain?
✔✔To visualize the shape and arrangement of bacteria.
What is the purpose of a negative stain?
✔✔To observe the morphology and size of bacteria without heat fixation.
What color do Gram-positive bacteria appear after a Gram stain?
✔✔Purple.
1
,What is the decolorizing agent used in the Gram staining process?
✔✔Alcohol or acetone.
What type of microorganism is visualized with an acid-fast stain?
✔✔Mycobacteria.
What is the purpose of performing a streak plate technique?
✔✔To isolate individual bacterial colonies.
What is a colony in microbiology?
✔✔A visible mass of microorganisms originating from a single cell.
What is the function of a condenser in a compound microscope?
✔✔To focus light onto the specimen.
What is the magnification of the ocular lens in most standard microscopes?
✔✔10x.
2
,What is the term for the ability of a microscope to distinguish two closely spaced objects as
separate?
✔✔Resolution.
What is the purpose of heat fixation in bacterial smear preparation?
✔✔To kill the bacteria and adhere them to the slide.
What type of media is used to distinguish between microorganisms based on biochemical
properties?
✔✔Differential media.
What is the purpose of a motility test in microbiology?
✔✔To determine if an organism is capable of movement.
What structure allows bacterial motility?
✔✔Flagella.
What is the purpose of a selective medium?
3
, ✔✔To inhibit the growth of certain organisms while allowing others to grow.
What does a positive catalase test indicate?
✔✔The presence of the enzyme catalase in the organism.
What is the purpose of using a control in microbiology experiments?
✔✔To provide a standard for comparison and ensure accuracy.
What is the term for bacteria that can grow at high salt concentrations?
✔✔Halophiles.
What is the primary component of bacterial cell walls that Gram staining detects?
✔✔Peptidoglycan.
What color do acid-fast bacteria appear after staining?
✔✔Pink or red.
What is the purpose of incubating plates upside down?
4
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 BrilliantScores. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
