MB C3 Quiz

hixolara's version from 2016-09-10 02:42


Quiz 3


Question Answer
1. Which of the following statements about Leeuwenhoek’s microscope is false they were able to reveal very fine details of bacteria
2. Which of the following staments about resolution is trueRefers to the ability of a lens to distinguish adjacent object
3. Lights of ____________ wavelength typically will result in _______________ resolutionShorter...better
4. When light passes through an object______________ of the light has occurredTransmission
5. When the light rays pass into an object but do not emerge, ________ has taken placeAbsorption


Question Answer
6. Electron microscope have a much better resolving power when compared to light microscopes becauseElectrons have shorter wavelengths than visible light rays
7. Diffraction occurs whenLight passes through a small opening
8. Why is diffraction a problem for microscopyThe small size of higher-power lenses causes severe diffraction
9. The lens closest to the slide during a microscopic examinationObjective
10. The lens closest to the eyes during a microscopic examination is theOcular


Question Answer
11. The total magnification of a specimen being viewed with a 10X ocular and a 40X objective lens is400X
12. To calculate the total magnification of a light microscope you must knowThe magnification of the objective and ocular lens
13. Ultraviolet light is a key component ofFluorescence microscopy
14. Which is a FALSE statement about light microscopyA normarski microscope produces much higher resolution than the standard phasecontrasting microscope
15. Electrons microscopes use _____________ to focus the electron beamElectromagnets
16. Electron microscopesAre much more expensive and take up more space than light microscopes


Question Answer
17. The technique that involves the evaporation of water from a frozen and fractured specimen is calledFreeze etching
18. The term “ basic dyes” refers to the fact that these dyesAre positively charged
19. Which of the following is not a differential stainflagellar stain
20. Why do basic dyes attach to the most bacterial surfacesMost bacterial surfaces are negatively charged