Which one of the following microscope has ability to produce three dimensional images of whole objects?
a) compound light microscope
b) transmission electron microscope
c) scanning electron microscope
d) Leevonhoeke’s microscope
Explanation: The scanning electron microscope (SEM) uses a focused beam of high-energy electrons to generate a variety of signals at the surface of solid
Certain stains when used in low concentration are non-toxic to living tissue are called……..
a) temporary stains
b) vital stains
c) counter stains
d) permanent stains
Explanation: Janus green B is a basic dye and vital stain used in histology.
A counter stain is stain that makes cells or structures more visible, when not completely visible with the………
a) ground stain
b) principal stain
c) negative stain
d) microscope
Stain does not increase the ………
a) resolution
b) magnification
c) both a and b
d) none of them
Which of the following are permanent stains?
a) aniline blue and borax carmine
b) eosin and Feulgen’s stain
c) methylene blue, sefranin and Leishman’s stains
d) all of these
Explanation: Permanent staining does not distort the cells and is used for tissue that is to be preserved for a considerable period of time.
Which of the following are temporary stains?
a) aniline sulphate
b) iodine solution
c) Schultz’s solution
d) all of these
Explanation: A type of stain used for immediate observation through the light microscope. Such stains often damage the section, or the colour of the stain fades after a short time.
