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Microbiology Chapter 4 potential test questions

front 1

Which of the following is the smallest?

  1. decimeter
  2. millimeter
  3. nanometer
  4. micrometer

back 1

c. nanometer

front 2

A nanometer is __________ than a micrometer

  1. 10 x larger
  2. 10 x smaller
  3. 1000 x larger
  4. 1000 x smaller

back 2

d. 1000 x smaller

front 3

Resolution is best described as _________

  1. the ability to view something that is small
  2. the ability to magnify a specimen
  3. the ability to distinguish between two adjacent objects
  4. the difference between two waves of electromagnetic radiation

back 3

c. the ability to distinguish between two adjacent objects

front 4

Curbed glass lenses _________ light.

  1. refract
  2. bend
  3. magnify
  4. both a and b

back 4

d. both refract and bend

front 5

Which of the following factors is important in making an image appear larger?

  1. the thickness of the lens
  2. the curvature of the lens
  3. the speed of the light passing through the lens
  4. all of the above

back 5

d. all of the above

front 6

which of the following is different between light microscopy and transmission electron microscopy?

  1. magnification
  2. resolution
  3. wavelengths
  4. all of the above

back 6

d. all of the above

front 7

Which of the following types of microscopes produces a three dimensional image with a shadowed appearance?

  1. simple microscope
  2. differential interference contrast microscope
  3. fluorescent microscope
  4. transmission electron microscope

back 7

b. differential interference contrast microscope

front 8

Which of the following microscopes combines the greatest magnification with the best resolution?

  1. confocal microscope
  2. phase-contrast microscope
  3. dark-field microscope
  4. bright-field microscope

back 8

a. confocal microscope

front 9

Negative stains such as eosin are also called _______________________.

  1. capsule stains
  2. endospore stains
  3. simple stains
  4. acid fast stains

back 9

a. capsule stains

front 10

In the binomial system of nomenclature, which term is always written in lowercase letters?

  1. kingdom
  2. domain
  3. genus
  4. specific

back 10

d. specific epithet

front 11

If an object magnifies 40 x and each binocular lens magnifies 15 x, the total magnification of the object being viewed is _____________.

back 11

600 x

front 12

The type of fixation developed by Koch for bacteria is ___________________.

back 12

heat fixation

front 13

Immersion oil ___________ (increases/decreases) the numerical aperture, which _______________(increases/decreases) resolution because ______________ (more/fewer) light rays are involved.

back 13

increases

increases

more

front 14

___________ refers to differences in intensity between two objects

back 14

contrast

front 15

Cationic chromophores such as mthylene blue ionically bond to ______________ (positively/negatively) charged chemicals such as DNA and proteins.

back 15

negatively