100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Microbiology Lab Midterm Exam Questions and Answers 100% Pass $12.49
Add to cart
Quickly navigate to
Preview
  2.  
  3. Microbiology Lab
  4.  
  5. Microbiology Lab

Exam (elaborations)

Microbiology Lab Midterm Exam Questions and Answers 100% Pass
 0 view  0 purchase
  • Course
  • Microbiology Lab
  • Institution
  • Microbiology Lab

Microbiology Lab Midterm Exam Questions and Answers 100% Pass Compound microscope - 1. Ocular-eyepiece lens (usually 10x) 2. Objective-nosepiece lenses (commonly 4x, 10x, 45x, and 100x) At what magnification do you use the oil immersion technique? - 100x. Total Magnification = - Magnification ...

[Show more]

Preview 3 out of 19  pages

Document information

  • January 17, 2025
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • microbiology lab midterm exam questions and answer

Written for

  • Microbiology Lab
  • Microbiology Lab

Seller

avatar-seller
KatelynWhitman

Reviews received

Content preview

Microbiology Lab Midterm Exam
Questions and Answers 100% Pass


Compound microscope - ✔✔1. Ocular-eyepiece lens (usually 10x)


2. Objective-nosepiece lenses (commonly 4x, 10x, 45x, and 100x)


At what magnification do you use the oil immersion technique? - ✔✔100x.


Total Magnification = - ✔✔Magnification (Objective) x Magnification (Ocular)


Important Parts of the Microscope - ✔✔Framework, Stage, and Lens System


Framework - ✔✔Arm and base are the structural parts of the microscope which support

the basic frame.


Stage - ✔✔Holds the slide. The mechanical stage clamps the slide and moves the slide

around the stage.


Lens System - ✔✔Oculars, Objective, and Condenser


Oculars - ✔✔Eyepiece lenses (usually 10x magnification)


Objectives - ✔✔Lenses attached to rotatable nosepiece, common magnification of 4x,

10x, 45x and 100x.



Katelyn Whitman, All Rights Reserved © 2025 1

,Parfocalized microscope focusing adjustments are not to be made when... - ✔✔changing

the objective lenses.


The oil has approximately the same refractive index as glass to prevent... - ✔✔light loss

due to diffraction (bending of light rays) which would occur if light traveled from one

refractive index to another (eg. glass to air)


As magnification of the objective lens increases... - ✔✔the working distance decreases.


Working distance - ✔✔distance between the object on slide and the objective lens, when

in focus.


Condenser - ✔✔directs light towards the objective lens in bright field microscopy.


In dark field microscopy, the condenser... - ✔✔directs light at oblique angles away from

the objective lens in a manner that allows only objects in the field of view to redirect or

scatter light into the objective lens. This causes objects to appear white on a dark field.


Iris Diaphragm - ✔✔lever located in the condenser that adjusts the diameter of the cone

of light so that it just fills the objective lens.


As you close down the Iris Diaphragm... - ✔✔1. The light intensity decreases


2. Contrast improves


3. Depth of field increases


4. Limit Resolution (with oil immersion lens)



Katelyn Whitman, All Rights Reserved © 2025 2

, Resolution - ✔✔Resolving Power. Expressed as d.


d = the smallest distance between two objects which can be seen as separate


d = the diameter of the smallest resolvable object


d = wavelength / 2 NA


NA = numerical aperture


To improve resolution... - ✔✔lower d.


d can be decreased by... - ✔✔lowering wavelength or increasing the NA.


Cocci - ✔✔More or less spherical organisms.


Bacilli - ✔✔Cylindrical organisms.


Helicoidal - ✔✔Spiral shaped organisms.


Incompletely separated cocci may appear in a number of different patterns depending

upon... - ✔✔the plane in which they divide and how they remain attached.


Diplococci - ✔✔pairs. Divide in one plane.


Streptococci - ✔✔chains. Divide in one plane.


Tetracocci - ✔✔tetrads. Divide in two planes.


Staphylococci - ✔✔clusters. Divide in three planes irregularly.




Katelyn Whitman, All Rights Reserved © 2025 3

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 KatelynWhitman. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $12.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

58716 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$12.49
  • (0)
Add to cart
Added