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Aptitude Mcq Questions Biology Diagnostic Test

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1. Charge on ?-particles is




2. ?-particle ionizes an atom




3. T.V sets and microwave ovens emits




4. A ?-particle in a single encounter




5. Strontium-90 is used as




6. The penetration power of ?-particle as compared to ?-particle is




7. Geiger counter is suitable for




8. A ?-particle can produce fluorescence in




9. Pair production cannot take place in vacuum as ________ is not conserved




10. CFC is used in




11. Average distance covered by ?-particle in air before its ionizing power ceases is called its




12. Which one of the following possesses greater penetration power ?




13. The most useful tracer is




14. ?-rays are electromagnetic waves like




15. Charge on ?-particle is




16. Why ?-rays are used to kill bacteria to sterilize surgical equipments etc?




17. ?-particle ionizes an atom




18. ?-particles possess greater penetration power than that of ?-particles due to its




19. Pair production cannot take place in vacuum as




20. Pair production can take place only with




21. A device for producing high velocity nuclei is




22. Which of the following will be a better shield against ?-rays?




23. The maximum safe limit dose for persons working in nuclear power station are




24. Radiations are used for the treatment of skin of a patient is




25. The one which is present in all living things




26. The mechanism of stomatal movement is related to the branch of Biology called




27. Maximum number of species of living things on earth are




28. Variety among amino acids is produced due to




29. Primary structure of proteins determines




30. The one which is not a globular protein




31. An enzyme which converts a dipeptide into separate amino acids is an example of




32. Cellular digestion is associated with which organelle




33. The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called




34. Membranes of the grane are sites where




35. The simplest of oxygen producting photosynthetic organisms are




36. Protein coasts of viruses are synthesized in




37. Mycoplasmas have been included in bacteria because




38. Yeasts reproduce asexually by forming




39. The one which can tolerate highest external osmotic pressure




40. Locomotory structures are not found in which of the following group




41. The cell wall of oomycetes is chiefly composed of




42. One celled green ptotists are included in




43. Pick the odd one out




44. The one which is incorrect pair




45. Double fertilization occurs in




46. Amphoixus is a




47. Adult birds normally possess only one functional




48. Following possess bilateral symmetry as larva and radial symmetry as adult:




49. Which of the following are triploblastic and acoelomate?




50. Which of the following occurs in anaerobic respiration but not in aerobic respiration?