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UPSC NDA and NA Microscope Quiz 1

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UPSC NDA and NA Microscope Quiz 1

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Physics is a very important subject for Railway Recruitment exams and UPSC Exams. UPSC NDA and NA Prelims Exam is the combination of Mathematics and General Ability. Microscope topic related questions are very important in Physics sections. All these questions are easily understandable format. UPSC NDA and NA Microscope Quiz 1 is very useful to get the maximum marks from the General Ability sections. Candidates can check the daily updates at UPSC Official Website

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Paper Mode Subject Marks Duration
Paper-I Mathematics 200 Marks 2 hours
Paper-II General Ability 200 Marks 2 hours
UPSC NDA and NA Syllabus

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1. What would you see using a dark-field microscope on bacteria that transmit light without reflecting it into the objective lens?
    A. Dark bacteria on a bright background. B. Bright bacteria on a bright background. C. Bright bacteria on a dark background. D. Fluorescent bacteria on a dark background.

Answer: Option D
2. How does ultraviolet light microscopy use fluorescence to make images?
    A. Objects absorb invisible ultraviolet light and emit visible light to make images. B. Objects absorb invisible ultraviolet light and emit nothing. C. Objects transmit ultraviolet light without absorbing it. D. Objects scatter all ultraviolet light so it never enters the microscope's objective lenses.

Answer: Option B
3. If you wish to change an immunofluorescence stain so it stains a different type of microorganism than it did before, what would you do?
    A. Use a different type of microscope. B. Switch from epifluorescence to transmitted fluorescence. C. Change the dye from a fluorescent to a non-fluorescent dye. D. Use a different type of antibody.

Answer: Option C
4. Scanning electron microscopy is most often used to reveal __________.
    A. surface structures B. internal structures C. both surface and internal structures simultaneously D. either surface or internal structures, but not simultaneously

Answer: Option B
5. If you were given a specimen of an active, motile microorganism, which of the following types of microscopy would be the most effective in visualizing the live microbe?
    A. bright-field microscopy B. dark-field microscopy C. phase-contrast microscopy D. scanning electron microscopy

Answer: Option D
6. The instrument that produces a bright image of the specimen against a dark background is called a(n) __________ microscope.
    A. phase-contrast B. transmission electron C. scanning electron D. bright-field

Answer: Option B
7. A microscope that exposes specimens to ultraviolet and forms an image with the resulting light emitted at a different wavelength is called a __________ microscope.
    A. phase-contrast B. dark-field C. scanning electron D. transmission electron

Answer: Option C
8. Which of the microscopes below form images in visible light?
    A. bright-field B. dark field C. fluorescence D. B, and C

Answer: Option D
9. What do phase-contrast and dark-field microscopes have in common?
    A. They increase contrast between the specimens and their surroundings without staining. B. They make specimens appear bright on a dark background. C. They make specimens appear dark on a bright background. D. They make specimens fluoresce.

Answer: Option D
10. Which of the microscopes below is usually good for use on unstained specimens?
    A. phase-contrast B. fluorescence C. bright-field D. scanning electron

Answer: Option C
11. Resolving power of a microscope is a function of____________
    A. Wavelength of light used B. Numerical aperture of lens system C. Refractive index D. Wavelength of light used and numerical aperture of lens system

Answer: Option D
12. The greatest resolution in light microscopy can be obtained with ___________
    A. Longest wavelength of visible light used B. An objective with minimum numerical aperture C. Shortest wavelength of visible light used D. Shortest wavelength of visible light used and an objective with the maximum numerical aperture

Answer: Option D
13. In fluorescence microscopy, which of the following performs the function of removing all light except the blue light?
    A. Exciter filter B. Barrier filter C. Dichroic mirror D. Mercury arc lamp

Answer: Option A
14. In light microscopy, which of the following is used as fixatives prior to staining technique?
    A. Osmic acid B. Glutaraldehyde C. Heat D. Osmic acid, glutaraldehyde, heat

Answer: Option C
15. In Phase contrast microscopy, the rate at which light enters through objects is__________
    A. Constant B. Inversely proportional to their refractive indices C. Directly proportional to their refractive indices D. Exponentially related to their refractive indices

Answer: Option B

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