MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure? |
| A. | Negative-Staining |
| B. | Shadow Casting |
| C. | Ultrathin Sectioning |
| D. | Negative-Staining, Shadow Casting, Ultrathin Sectioning, Freeze-Etching |
| Answer» E. | |
| 2. |
Where do we obtain the magnified image of the specimen in SEM? |
| A. | cathode ray tube |
| B. | phosphorescent screen |
| C. | anode |
| D. | scanning generator |
| Answer» B. phosphorescent screen | |
| 3. |
On what factors do the intensity of secondary electrons depend upon? |
| A. | shape of the irradiated object |
| B. | chemical composition of the irradiated object |
| C. | number of electrons ejected |
| D. | size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding |
| Answer» E. | |
| 4. |
WHERE_DO_WE_OBTAIN_THE_MAGNIFIED_IMAGE_OF_THE_SPECIMEN_IN_SEM??$ |
| A. | cathode ray tube |
| B. | phosphorescent screen |
| C. | anode |
| D. | scanning generator |
| Answer» B. phosphorescent screen | |
| 5. |
Which of the following techniques are used in Transmission Electron Microscopy (TEM) for examining cellular structure? |
| A. | Negative-Staining |
| B. | Shadow Casting |
| C. | Ultrathin Sectioning |
| D. | Negative-Staining, Shadow Casting, Ultrathin Sectioning, Freeze-Etching |
| Answer» E. | |
| 6. |
On what factors do the intensity of secondary electrons depends upon? |
| A. | shape of the irradiated object |
| B. | chemical composition of the irradiated object |
| C. | number of electrons ejected |
| D. | size and chemical composition of the irradiated object, number of electrons ejected and on the number of electrons reabsorbed by surrounding |
| Answer» E. | |
| 7. |
The secondary electrons radiated back in scanning microscope is collected by? |
| A. | specimen |
| B. | anode |
| C. | vacuum chamber |
| D. | cathode |
| Answer» C. vacuum chamber | |
| 8. |
Which among the following helps us in getting a three-dimensional picture of the specimen? |
| A. | Transmission Electron Microscope |
| B. | Scanning Electron Microscope |
| C. | Compound Microscope |
| D. | Simple Microscope |
| Answer» C. Compound Microscope | |
| 9. |
Negative Staining is used for examining _____________ |
| A. | virus particles |
| B. | protein molecules |
| C. | bacterial flagella |
| D. | virus particles, protein molecules and bacterial flagella |
| Answer» E. | |
| 10. |
Degree of scattering in transmission electron microscope is a function of __________ |
| A. | wavelength of electron beam used |
| B. | number of atoms that lie in the electron path |
| C. | number and mass of atoms that lie in the electron path |
| D. | mass of atoms that lie in the electron path |
| Answer» D. mass of atoms that lie in the electron path | |
| 11. |
Which of the following are true for electron microscopy? |
| A. | specimen should be thin and dry |
| B. | image is obtained on a phosphorescent screen |
| C. | electron beam must pass through evacuated chamber |
| D. | specimen should be thin and dry, image is obtained on a phosphorescent screen and electron beam must pass through evacuated chamber |
| Answer» E. | |
| 12. |
Electron Microscope can give a magnification up to ___________ |
| A. | 400,000X |
| B. | 100,000X |
| C. | 15000X |
| D. | 100X |
| Answer» B. 100,000X | |
| 13. |
Which of the following is used in electron microscope? |
| A. | electron beams |
| B. | magnetic fields |
| C. | light waves |
| D. | electron beams and magnetic fields |
| Answer» E. | |