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microscopy

Ryan Cornwell 20 preguntas

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Preguntas del test (20)

  1. 1A light microscope is able to magnify an object by which of the following
    mechanisms?
    1. ADecreasing the angle of light from the object entering the eye.
    2. BIncreasing the angle of light from the object entering the eye.
    3. CUsing a system of concave lenses.
    4. DIncreasing the wavelength of light from the object.
    5. EDecreasing the wavelength of light from the object.
  2. 2Which of the following helps to explain why an electron microscope can
    resolve much smaller structures than a light microscope?
    1. AElectrons are used to magnify the light waves.
    2. BElectromagnetic lenses focus the beam of light
    3. CElectrons have shorter wavelengths than visible light.
    4. DThe observed structures are very thick.
    5. EElectrons have a longer wavelength than visible light.
  3. 3Which of the following items is likely to be the smallest?
    1. AA peroxisome.
    2. BA cell nucleus
    3. CA mitochondrion.
    4. DA white blood cell
    5. EA chloroplast.
  4. 4Which of the following items is likely to be the biggest?
    1. AA peroxisome.
    2. BA cell nucleus
    3. CA mitochondrion
    4. DA white blood cell.
    5. EA chloroplast.
  5. 5Which of the following represents the better resolution?
    1. A0.2 mm
    2. B0.2 µm
    3. C1 µm
    4. D1 mm
    5. E20 nm
  6. 6What is the main advantage of phase contrast microscopy over traditional
    light microscopy?
    1. AIt produces a clearer image of unstained specimens.
    2. BIt is cheaper and easier to perform.
    3. CIt produces a very sharp image of a defined plane in the specimen.
    4. DIt produces a better image of very brightly coloured sections.
    5. EIt uses ultraviolet light.
  7. 7Which of the following makes up the largest proportion of a typical cell by
    weight?
    1. Asalts
    2. Bamino acids
    3. Cwater
    4. Dlipids
    5. Eproteins
  8. 8Which of the following statements about eukaryotic cells is true?
    1. AThey are usually smaller than prokaryotes.
    2. BThey do not contain circular DNA
    3. CThey contain membrane-bound organelles.
    4. DThey evolved before prokaryotes
    5. EThey always contain chloroplasts.
  9. 9Which of the following elements is found in the lowest amount in human
    cells?
    1. AOxygen
    2. BNitrogen
    3. CManganese
    4. DCarbon
    5. EPotassium
  10. 10label the microscope Imagen de la pregunta 10
    1. Aeye
    2. Bmirror
    3. Clight
    4. Dspecimen
    5. Eobjective lens
    6. Freal image
    7. Gocular lens

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Descripción
Test sobre microscopy , creado por Ryan Cornwell el 27/04/2019.
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English
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