Tools & Technique) 1. One micron is equal to: (1) 1/10 of a mm - TopicsExpress

Tools & Technique) 1. One micron is equal to: (1) 1/10 of a mm (2) 1/100 of a mm (3) 1/1000 of a mm (4) 1/10000 of a mm 2. Resolving power of human eye is (1) 1 cm (2) l m (3) 100 m (4) 100mm 3. Resolving power of compound microscope is (1) 1 mm (2) 10 nm (3) 0.25 m (4) 0.25 nm 4. Electron microscope has high resolving power due to (1) Short wavelength of electrons (2) High wavelength of electrons (3) High velocity of electron beam (4) Electromagnets 5. Events of living cell organelles is studied by mean of (1) Ultraviolet microscope (2) Fluorescent microscope (3) Phase-constrast microscope (4) Compound light microscope 6. Ultrastructure of cell organelles is studied by mean of (1) Phase-constrast microscope (2) Electron microscope (3) X-ray microscope (4) Ultra-violet microscope 7. Three-dimensional surface view of objects is taken by means of (1) X-ray crystallography (2) Transmission electron microscope (3) Scanning electron microscope (4) Ultraviolet microscope 8. DNA structure was studied by mean of (1) Cell fractionation (2) X-ray crystallography (3) Scanning electron microscope (4) Autoradiography 9. Technique useful for studying metabolic processes is (1) Autoradiography (2) Electron microscopy (3) Spectrophotometry (4) Chromatography 10. A Nobel Prize was awarded when the molecular details of an important chemical became known by X-ray crystallography to (I) Wilkins (2) Kendrew (3) Watson and Crick (4) Ochoa 11. Stain used in Fuelgen test is (I) Janus green (2) Basic fuchsin (3) Neutral red (4) Safranine 12. Separation of cell organelles is done by (1) Homogenisation (2) Chromatography (3) Differential centrifugation (4) Electrophoresis 13. Fuelgen or Schiff’s stain is specific for (1) Protein (2) Lignin (3) DNA (4) RNA 14. Specific stain for mitochondria is (1) Fast green (2) Aniline blue (3) Janus green (4) All of these 15. Labelled uridine is used for study of (1) Protein synthesis (2) DNA synthesis (3) Photosynthesis (4) RNA synthesis 16. Rethenium red help in analysis of (1) Cutin (2) Lignin (3) Cellulose (4) Pectic substances 17. Phase-contrast microscope was invented by (1) Zernicke F (2) Knoll M. and Ruska E. (3) Galileo Galilei (4) Janssen H. and Janssen Z. 18. The mitotic spindle, made up of microtubules (1) Phase-contrast microscope (2) Ultraviolet microscope (3) Dark- field microscope (4) Polarizing 19. Which of the following mircroscope used lens composed of fused quartz, calcium fluoride or lithium carbonate? (1) Fluorescence microscope (2) Phase-contrast micrscope (3) Ultraviolet microscope (4) Electron microscope 20. The microscope which uses high wavelength ultraviolet ray is: (1) Ultraviolet microscope (2) Phase-contrast microscope (3) Fluorescence microscope (4) All of these ////////

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