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MCQs

Total Questions : 116 | Page 9 of 12 pages
Question 81. Which of the following component of TEM focuses the beam of electrons on the sample?
  1.    ocular lens
  2.    condenser lens
  3.    stage
  4.    column
 Discuss Question
Answer: Option B. -> condenser lens
Answer: (b).condenser lens
Question 82. Image formation in electron microscope is based on ___________________________
  1.    column length
  2.    electron number
  3.    differential scattering
  4.    specimen size
 Discuss Question
Answer: Option C. -> differential scattering
Answer: (c).differential scattering
Question 83. The biological materials have little intrinsic capability to ____________________
  1.    scatter electrons
  2.    stain
  3.    remain viable
  4.    be captured
 Discuss Question
Answer: Option A. -> scatter electrons
Answer: (a).scatter electrons
Question 84. Glutaraldehyde is a ________________
  1.    metal
  2.    fixative
  3.    non-metal
  4.    atomic species
 Discuss Question
Answer: Option B. -> fixative
Answer: (b).fixative
Question 85. Osmium is a ___________________
  1.    non metal
  2.    heavy metal
  3.    alloy
  4.    light metal
 Discuss Question
Answer: Option B. -> heavy metal
Answer: (b).heavy metal
Question 86. In TEM, the tissue is stained by floating on drops of ______________________
  1.    hydrocarbons
  2.    slow-molecular weight stains
  3.    heavy metal soutions
  4.    oil immersion
 Discuss Question
Answer: Option C. -> heavy metal soutions
Answer: (c).heavy metal soutions
Question 87. At the critical drying point, there is no surface tension between ________________
  1.    gas and oil
  2.    gas and liquid
  3.    liquid and liquid
  4.    oil and liquid
 Discuss Question
Answer: Option B. -> gas and liquid
Answer: (b).gas and liquid
Question 88. The scanning electron microscope is used to examine _____________
  1.    antigens
  2.    antibodies
  3.    anticoaggulants
  4.    cell surfaces
 Discuss Question
Answer: Option D. -> cell surfaces
Answer: (d).cell surfaces
Question 89. In the preparation of samples for SEM, the specimens are air-dried by a process of critical-point drying.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 90. Shadow casting is a technique of visualizing ___________________
  1.    isolated particles
  2.    mounts
  3.    shoot tips
  4.    root tips
 Discuss Question
Answer: Option A. -> isolated particles
Answer: (a).isolated particles

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