Tag: CSIR NET Life Science Previous Year Questions on METHODS IN BIOLOGY

28. Which property is measured with a scanning probe microscope? A. Magnetism B. Electric resistance C. Light absorption D. All of the above Scanning probe microscopes (SPMs) excel at nanoscale […]

27. From the following statements: A. Coloured images can be obtained by transmission electron microscopy by fluorescent labelling of the specimen B. Scanning electron microscopy requires sectioning of the sample […]

26. To achieve the best resolution using a fluorescence microscope, what combination of wavelength of emitted light (λ), refractive index and the angle (2θ) by which light enters into the […]

25. Which one of the following microscopes would you use to visualize a protein fused to an appropriate reporter in a living cell? A. Fluorescence microscope B. Scanning electron microscope […]

24. The most important property of any microscope is its resolution (D) and can be calculated from the formula: D = 0.61λ / (µ sin θ) where D is the minimum distance […]

23. A microorganism when viewed under a compound microscope with objective of 10× magnification measured 400 nm in length. The same microorganism when viewed under a dissecting microscope with 10× lens […]

21. Co-localization of two fluorescently labelled proteins in an organelle in cells is usually visualized by: A. Interference-contrast microscopy B. Scanning electron microscopy C. Confocal microscopy D. Atomic force microscopy […]

20. Match the following microscopic techniques with their respective functions Microscopic technique Functions 1. Phase contrast microscopy 2. Fluorescent microscopy 3. Transmission electron microscopy 4. Bright field microscopy 5. Dark […]

19. In scanning electron microscope (SEM) to form an image of the specimen, (A) An electron should pass through the specimen (B) Electrons are scattered from the surface of the […]