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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. The antibiotic ampicillin is
Q2. The first fungicide discovered for plant diseases was
Q3. One of the greatest famines of the nineteenth century suffered by the Irish people which led to over 1 million deaths due to starvation was caused by a fungal infection of the potato crop. The disease it caused was
Q4. The water core disease of apples is caused by
Q5. The necrotic ring spot disease of stone fruits (cherry, peach, plum, etc.) is caused by
Q6. Which of the following plant diseases is caused by a virus?
Q7. The witch weed disease of plants like sugarcane and rice is caused by
Q8. Which of the following plant diseases is not a bacterial disease?
Q9. Which of the following is a bacterial disease?
Q10. Match the following diseases with the plants affected [A. black heart - 1. peas, B. red rot - 2. wheat, C. kamal bunt - 3. sugarcane, D. powdery mildew - 4. potatoes]
Q11. Assertion (A): The Indian Agriculture Research In­stitute is also called PUSA institute because Reason (R): It was first established at Pusa, a place in Orissa.
Q12. Assertion (A): Kamal bunt is a bacterial disease of the wheat plant. It is so talled because Reason (R): This disease was first discovered at Kamal, in Haryana.
Q13. The most promising method of controlling nematodes in the field has been through the use of chemicals called nematocides. Which of the following is such a chemical?
Q14. Effective method/s of controlling nematodes is/are
Q15. The source of three important narcotic drugs-bhang, ganja and hashish (charas)-is one and the same plant. Which one of the following is this plant?
Q16. The disease not transmitted by house-fly is
Q17. Other than spreading malaria, Anopheles mosquitoes are also vectors. of
Q18. One of the pandemic diseases is
Q19. A group of diseases normally transmitted between vertebrate animals and man is
Q20. The first effective vaccine against polio was prepared by
Q21. A doctor advises a patient to take plenty of citrus fruits, guavas, tomatoes and amlas over a period of two months regularly. What do you think is the complaint of the patient?
Q22. Which one of the following groups of diseases spreads through mosquito bites among humans?
Q23. Rubella is also as
Q24. Malaria can be cured with a drug extracted
Q25. Heavy alcohol consuming people generally die of
Q26. When a person, after a certain degree of exertion, suffers from pain in the chest or below the collar bones in the event of inadequate supply of oxygen to the heart muscles, he is said to suffer from
Q27. The body louse is the vector of 1.yellow fever, 2. epidemic typhus, 3. trench fever, 4. dengue fever
Q28. A simple sequence in which the grass grows, a cow eats the grass, a human eats the cow or drinks its milk, is an example of
Q29. In overpopulated parts of the world where there is shortage of food, the inhabitants should feed predominantly on
Q30. The major jute producing countries in order of their production are:
Q31. Which one of he following groups of organisms is thermophilic in that they can tolerate and grow at fairly high temperatures?
Q32. Biotic potential is
Q33. The increase in population all over the world is due to
Q34. The density of population in a country is obtained by counting the total number of individuals
Q35. A powerful eye irritant present in smog is
Q36. Coal burning power plants and factories are responsible for about 86% of
Q37. Who among the following proposed the basic pos­tulate that all organisms were made up of cells and that the cell was the basic unit of structure and function?1. Louis Pasteur, 2. M J Schleiden, 3. Robert Hooke, 4. T Schwann
Q38. A prokaryote differs from a eukaryote in: 1. being single-celled, 2. lacking organelles like mitochondria and Golgi bodies, 3. lacking membrane-bound nucleus, 4. lacking ribosomes
Q39. Which of the following are not prokaryotes? 1. Chlorella, 2. influenza virus, 3. tuberculosls bacterium, 4. yeast
Q40. An animal cell differs from a plant cell in 1. lacking a cell wall, 2. lacking chloroplasts, 3. having centrioles, 4. having haemoglobin
Q41. Match the discovery in column A with the scientist in column B and select the correct answer using the codes given below the columns A. Binomial nomenclature - 1. K Landsteiner B. Fluid-mosaic model of cell membrane structure - 2. G. Beadle and E Tatum C. One geneone enzyme hypothesis - 3. S J Singer and G L Nicolson D. Human blood groups - 4. Carl Linnaeus
Q42. There are twenty chromosomes in a somatic cell of maize. Compare the chromosome numbers given as follows with the organ of the maize plant. (1. Endosperm 30, 2. Pollen grains 10, 3. Root 30, 4. Leaf 20) Which of the above pairs are correctly matched?
Q43. There are forty six chromosomes in a normal human body cell. Compare the chromosome numbers given below with the special structure in the human body. (1. Ovum 23, 2. Sperm 46, 3. Kidney cells 46, 4. Urinary bladder 23) Which of the above pairs are correctly matched?
Q44. Consider the following statements about viruses: [1. A particular virus has either DNA or RNA, never both, 2. The DNA or RNA of the viruses is enclosed and protected by a lipoproteinaceous membrane, 3. RNA is the genetic material of some viruses, 4. Dr. Peyton Rous, an American virologist, was awarded the Nobel Prize for first isolating a virus in pure crystalline form] which of the above statement/s is/are not true?
Q45. Consider the following statement about plasma membrane: [1. All living cells are enclosed by a plasma membrane, 2. Cholesterol is the most abundant lipid in some of the plasma membranes, 3. The plasma membrane is permeable to water-soluble substances, 4. Some of the proteins in the plasma membrane are enzymatic in function] Which of the above statements are correct?
Q46. Compare the photosynthetic pigments given below with the plant group: [1. Fucoxanthin - brown algae, 2. Phycoerythrin - red algae, 3. Phycocyanin - green algae, 4. Lutein ù angiospermic leaves] Which of the above pairs are correctly matched?
Q47. Which of the following events are associated with photosynthesis? Select the correct answer using the codes below the events: [1. Capture of light energy by photosynthetic pigments, 2. Consumption of cellular ATP, 3. Reduction of carbon-dioxide, 4. Synthesis of sugars]
Q48. Consider the following discoveries in life sciences: [1. Principles of heredity, 2. Nucleus, 3. DNA as the genetic material, 4. Light essential for photosynthesis] The correct chronological sequence of these discoveries is:
Q49. Match List I with List II and select the correct answer using the codes given below the lists: List I - List II A. Cell theory - 1. P. Mitchell B. Theory of natural selection - 2. Beadle and Tatum C. One gene-one enzyme hypothesis - 3. Schleiden and Schwann D. Chemiosmotic hypothesis - 4. C. Darwin
Q50. The scientists in list I were awarded Nobel Prizes for their outstanding discoveries given in list II. Match the discoveries with the scientists and select the correct answer given below the list: List I - List II A. H Krebs - 1. Chemiosmotic hypothesis B. P. Mitchell - 2. Crystalization of Tobacco Mosaic Virus (TMV) C. W.M. Stanley - 3. Citric Acid Cycle D. M. Calvin - 4. C3 cycle
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