KTET |Category III | Natural Science |Previous Questions & Answers | 1 1. A gregarious pest is: Caterpiller Locust Sand fly Aphids2. Turner’s syndrome is caused due to the : Presence of an additional copy of X-chromosome Presence of an additional copy of chromosome number 21 Presence of an additional copy of chromosome number 14 Absence of one of the X-chromosomes3. The number of polypeptide chains in human haemoglobin is: One alpha chain and one beta chain Two alpha chains Two alpha chains and two beta chains One alpha chain and two beta chains4. Blood group with no antibodies in plasma is : B group A group AB group O group5. Synapsis occurs during : Diplotene Leptotene Zygotene Diakinesis6. Which one of the following is not true about bulliform cells ? Helps to minimize water loss They are colourless cells Present in abaxial epidermis They make the leaves curl inwards7. Choose the group which includes haploid parts only: Embryo sac, microspore Egg, ovule Pollen grain, ovule Embryo sac, tapetum8. Which one of the following is a bacterial disease? Brown rust of wheat Black rot of crucifers Late blight of potato Red rot of sugarcane9. Choose an example for syncytium from the following: Liquid endosperm in coconut Coleoptile in grasses Aleurone layer in monocots Coleorhiza in grasses10. Columns of Bertini is associated with: Liver Pituitary gland Kidney Ear11. Choose the statement which is not true about Bt cotton : Insect resistant plant Produces cry protein Contains genes from Bacillus amyloliquefaciens Toxic protein produced in the plant is insect specific12. Which one of the following is not a vector borne disease ? Swine Flu Malaria Chikungunya Leptospirosis13. Which one of the following is not a modification of stem? Thorn Pneumatophores Runner Bulbil14. Which one of the following represents the gametophytic stage of pteridophytes ? Strobilus Prothallus Protonema Spores15. Eutrophication is: Natural aging of a lake by nutrient enrichment Excessive growth of planktonic forms Increase in concentration of the toxicant at successive trophic levels Increased demand for oxygen by microorganisms16. Agar is obtained from : Gracilaria Chara Oscillatoria Chlorella17. The fruiting body of Agaricus is : Ascocarp Pseudocarp Cremocarp Basidiocarp18. Choose the option which includes bisexual organisms only: Nereis, Leech Ascaris, Earthworm Ascaris, Nereis Earthworm, Leech19. A nucleoside includes: Nitrogen bases only Nitrogen bases and sugar Nitrogen bases and phosphate Phosphate and sugar20. ________ attach skeletal muscles to bones. Cartilage Ligaments Tendons Joints21. Identify the correct statement regarding pineal gland: Located on either side of the trachea It is a composite gland Secretes melatonin Helps in the development of immune system22. Which one of the following represents wrinkled seed shape and green seed colour? RRYY ryry RyRy rryy23. Restriction enzymes are isolated from: Bacteriophage Bacteria Fungus Virus24. Identify the organelle which is not involved in photorespiration : Chloroplast Peroxisome Mesosome Mitochondria25. Which one of the following is a single cell protein ? Lactobacillus Nostoc Spirulina Anabaena26. Which one of the following is not true about active transport? Requires energy Requires membrane proteins Downhill transport Highly selective27. Which one of the following guards the opening between the left atrium and the left ventricle ? Mitral valve Inter atrial septum Tricuspid valve Inter ventricular septum28. Which one of the following is not used for the industrial production of acids? Acetobacter aceti Lactobacillus Clostridium butylicum Streptococcus29. A chemical which does not cause seed dormancy is : Abscissic acid Gibberellic acid Phenolic acid Para-ascorbic acid30. Which one of the following is not a phloem fiber? Hemp Cotton Flax Jute31. The dental formula in human is : 2132/2132 1223/1223 1232/1232 2123/212332. Which one of the following is not a four carbon compound formed during krebs cycle ? Succinic acid Malic acid Fumaric acid Citric acid 33. Most primitive member of the human race is : Homo habilis Australopithecus afarensis Homo neanderthalensis Ardipithecus ramidus34. A plant growth regulator which helps to achieve respiratory climactic during the ripening of fruit is: Cytokinin Ethylene Auxin Gibberellins35. Polytene chromosomes are joined at a point called : Centrosome Chromocentre Chromomere Kinetochore36. Choose the correctly matched pair : Yellow spot – Aperture of the iris Pupil- Point of maximum visual clarity Blind spot – Part of the choroid seen behind the cornea Cornea – Anterior part of the sclera37. _________ provides nutrition to the male germ cells. Interstitial cells Leydig cells Sertoli cells Goblet cells38. Which one of the following is an example of mutualism? Barnacle and whale Sea anemone and hermit crab Sucker fish and shark Vanda and tree39. The golden age of reptiles is: Mesozoic Cenozoic Paleozoic Proterozoic40. A mineral element which is a component of nitrogenase is : Molybdenum Chlorine Cobalt Nitrogen Loading … Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *CommentName * Email * Save my name, email, and website in this browser for the next time I comment.