UKSSSC 28 June 2019 exam paper Answer Key – First Shift

21. Natural reservoir of phosphorus are :
(A) Sea water
(B) Animal bones
(C) Rocks
(D) Fossils

22. What are honey bee drones at reproductive level ?
(A) Fertile females
(B) Fertile males
(C) Sterile males
(D) Sterile females

23. Polystyrene is :

24. Inverted pyramid is found in :
(A) Energy pyramid of grassland
(B) Biomass pyramid of grassland
(C) Biomass pyramid of aquatic system
(D) Pyramid of number of aquatic system

25. Complete linkage has been reported in :
(A) Maize
(B) Female drosophila
(C) Fowl
(D) Male Drosophila

26. The geometry of hybrid orbitals in d²sp³ hybridization is :
(A) Tetrahedral
(B) Ocatahedral
(C) Square planar
(D) Bipyramidal

27. From the following, in India, tropical rain forests are found in :
(A) Jammu & Kashmir
(B) Uttar Pradesh
(C) Andaman
(D) Himachal Pradesh

28. Hardy-Weinberg principle explains :
(A) Chromosomal aberration
(B) Genetic drift
(C) Genetic equilibrium
(D) All of the above

29. According to ‘VSEPR’ Theory the hybridization and shape of ‘XeF₄‘ (Xenon tetrafluoride) compound are, respectively:
(A) sp³ and Tetrahedral
(B) dsp² and Square Planar
(C) sp³d² and Square Planar
(D) sp³d² and Octahedral

30. Blue-baby syndrome is caused by :
(A) Cadmium pollution
(B) Mercury pollution
(C) Arsenic pollution
(D) Excess nitrates in drinking water

31. Indian one-horned Rhinocerous has been protected, in which of the following ?
(A) Gir Forest
(B) Corbett National Park
(C) Kaziranga National Park
(D) Bandipur Nationla Park

32. Minimata disease is caused by :
(A) Pb
(B) Hg
(C) Cd
(D) As

33. Synthesis of m-R.N.A. from D.N.A. is known as:
(A) Transcription
(B) Translation
(C) Transduction
(D) Transformation

34. Main bond to maintain secondary structure of protein is :
(A) Peptide bond
(B) Hydrophobic bond
(C) Disulphide bond
(D) Hydrogen bond

35. Partial hydrolysis of XeF4 at low temperature gives :
(A) XeO₃
(B) XeO F₂
(C) XeO F₄
(D) XeF₂

36. Cellulose is a:
(A) Disaccharide
(B) Pentose polyracharide
(C) Hexose polysaccharide
(D) Mucopolysaccharide

37. Who gave fluid mosaic model of plasma membrane ?
(A) Singer and Nicolson
(B) A.V. Leuven hock
(C) Robertson
(D) Gorter and Grendel

38. 4 gms. NaOH is dissolved in 250 cm3 of solution. Molarity of this solution is :
(A) .5 M
(B) .1 M
(C) .01 M
(D) .4 M

39. The innermost layer of human eye is :
(A) Choroid
(B) Cornea
(C) Sclera
(D) Retina

40. Which of the following vitamin, synthesized in animal body by bacteria ? (A) B1
(B) A
(C) E
(D) B12

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