Basic Science : Tools Techniques QUESTIONS AND ANSWERS :: part6 : 1 to 5
Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :
1.A major breakthrough in the studies of cells came with the development of electron microscope. This is because |
| Electrom microscope is more powerful than the light microscope as it uses a beam of electrons which |
| has wavelength much longer than that of photons |
| Resolution power of electron microscope is much higher than that of light microscope |
| Resolution power of electron microscope is 200 – 350 nm as compared to 0.1 – 0.2 nm for the light |
2.Tracer elements are |
| Vitamins |
| Radioisotopes |
| Microelements |
| Macroelements |
3.A living cell is to be studied without staining. A microscope useful for it |
| Phase contrast microscope |
| TEM |
| SEM |
| Fluorescent microscope |
4.Pure fractions of cellular components are isolated by |
| Chromatography |
| Differential centrifugation |
| Scanning electron microscopy |
| X-ray diffraction |
5.Which one is not radioactive? |
| ¹⁴C |
| ³H |
| ¹⁸O |
| ³²P |
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