Basic Science : Tools Techniques QUESTIONS AND ANSWERS :: part6 : 21 to 25
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
21.Electron microscope is used for |
| Study of cell division |
| Viewing cell structure |
| Viewing pollen grain |
| Viewing structure of large biomolecules |
22.Resolution power of scanning electron microscope is |
| 0.0001 nm |
| 0.01 nm |
| 0.1 nm |
| 5 – 20 nm |
23.Common method to determine weight of proteins is |
| X-ray diffraction |
| Ultracentrifugation |
| Classical chemistry |
| Both A and C |
24.A nanogram is |
| 10⁻⁹ g |
| 10⁻⁹ mg |
| 10⁹ mg |
| 10⁹ g |
25.Electron microscope was invented by |
| Schleiden |
| Zigmondy |
| Knoll and Ruska |
| Schwann |
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