Govt Jobs Test Preparation (General Science)

Govt Jobs Test Preparation General Science MCQS for LDC, UDC, Assistant, Data Entry Operator, Stenographer and Computer Operator

1. All of the following contain cartilage except:----------- ?

A) Larynx
B) Trachea
C) Bronchi
D) Bronchioles

ANSWER= (D) Bronchioles
Explain:-

 

2. Gaseous exchange through the skin is known as -------------- respiration ?

A)Cuticular
B)Cutaneous
C)Skin
D) Pulmonary

ANSWER= (B) Cutaneous
Explain:-

 

3. Respiratory distress syndrome is common especially for infants with a---------- ?

A) Less than 7 month
B)Less than 8 month
C)Less than 9 month
D)More than 9 month

ANSWER= (A) Less than 7 month
Explain:-

 

4. Parabronchi are open at -------------- end/s ?

A)single
B)both
C)don't have opening
D)none of these

ANSWER= (B) both
Explain:-

 

5. In most birds air sacs are ------------ in number ?

A)10
B)3
C)4
D)9

ANSWER= (D) 9
Explain:-

 

6. Vocal cords are stretched across------- ?

A) Larynx
B) Pharynx
C) Golttis
D) None of these

ANSWER= (C) Golttis
Explain:-

 

7. A joint formed between humerus, radius and ulna is an example of---------- ?

A)Immovable joint.
B)Slightly movable joint.
C)Freely movable joint
D)Fibrous joint

ANSWER= (C) Freely movable joint
Explain:-

 

8. Which of the following plays the major role in providing support to young herbaceous parts of the plant ?

A) Living cells of epidermis with higher turgor pressure.
B) Living cells of cortex and pith with higher turgor pressure.
C) Collenchyma cells
D) All of these

ANSWER= (D) All of these
Explain:-

 

9. Joint between two parietal bones, which is infact immovable one is an example of--------- ?

A)Fibrous joints
B)Cartilaginous joints.
C)Synovial joints.
D) None of these

ANSWER= (A) Fibrous joints
Explain:-

 

10. Fibrous capsule surrounding synovial joints may be thickened at some places to form:

A)Synovial membrane
B)Ligaments
C)Muscles.
D)Tendon

ANSWER= (B) Ligaments
Explain:-

 

11. Higher turgor pressure in a plant cell is maintained by---------------- ?

A) Large number of vacoules in a plant cell
B) Higher ionic concentration inside vacuoles resulting from active pumping of ions at their tonoplastic membrane
C) Higher osmotic pressure of the cell vacuole
D) both b and c

ANSWER= (D) both b and c
Explain:-

 

12. In which of the following joint muscles are arranged in the same plane as that of joint ?

A)Between radius and ulna.
B)Between ulna and scapula
C)Between humerus and scapula
D)Between femur and tibia

ANSWER= (D) Between femur and tibia
Explain:-

 

13. Which of the following hormone is predominantly responsible for bone weakening in older women ?

A)Progesterone.
B)Oestrogen
C)Parathyroid hormone.
D)Calcitonin.

ANSWER= (B) Oestrogen
Explain:-

 

14. Secondary cell wall of sclerenchyma cells is impregnated with----------------- ?

A)Cellulose
B)Peptidoglycan and murein.
C)Lignin
D)Pectin.

ANSWER= (C) Lignin
Explain:-

 

15. Which of the follwing is a childhood disease resulting from nutritive Ca2+ deficiency ?

A)Hypocalcaemia Tatanic spasms.
B)Osteomalacis.
C)Rickets.
D)Tetany

ANSWER= (C) Rickets.
Explain:-

 

16. Among the followings which is the most longest supportive cell ?

A)Tracheids
B) Sclereids
C)Trachea
D)Collenchyma cells

ANSWER= (A) Tracheids.
Explain:-

 

17. Which of the following statement about osteoporosis is incorrect.

A)It results from estrogen deficiency
B) Bone eating process takes over bone formation process.
C)There is reduction of bone mass and change in chemical composition of the matrix
D)It is common in old age.

ANSWER= (C) There is reduction of bone mass and change in chemical composition of the matrix (
Explain:-

 

18. An increrase in plant girth due to activity of ------------- is called secondary growth ?

A) Cork cambium
B) Pith.
C)Vascular cambium.
D)Both a and c

ANSWER= (D) Both a and c
Explain:-

 

19. Which of the following statements about fractures in old age is incorrect ?

A)They are more common than in adult age.
B) Occur as a result of bone being thin and weak.
C)Due to good blood supply it results in quick healing.
D)It involves osteoblasts and osteocytes.

ANSWER= (C) Due to good blood supply it results in quick healing.
Explain:-

 

20. Which of the following statements about fractures in old age is incorrect ?

A)Open reduction
B) Closed Fixation.
C)Open fixation.
D)Immobilization

ANSWER= (A) Open reduction
Explain:-

 

21. Vascular Cambium initially appears as actively dividing cells between----------------- ?

A) Primary Xylem and secondary xylem
B) Primary xylem and secondary phloem
C) Primary xylem and primary phloem
D) Secondary xylem and secondary phloem.

ANSWER= (C) Primary xylem and primary phloem
Explain:-

 

22. A fracture hematoma has------------ ?

A)Healing properties
B)Destructive properties.
C)Neutralizing properties.
D)Dead cells

ANSWER= (D) Dead cells
Explain:-

 

23. Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ------------ ?

A) Chemotropic movement
B) Chemotactic movement .
C) Chemosastic movement
D) Haptonastic movement

ANSWER= (B) Chemotactic movement
Explain:-

 

24. Which of the following cells are involved in soft callus formation ?

A) Fibroblast and osteoblast
B) Osteoblast and osteoclast.
C) Osteoclast and osteocyte
D) Onteocyte and osteoblast

ANSWER= (A) Fibroblast and osteoblast
Explain:-

 

25. Bony callus formation completes in----------- ?

A) 2-3 weeks
B) 3-4 weeks.
C) 2-3 months.
D) 3-4 months.

ANSWER= (C) 2-3 months.
Explain:-

 

26. The place of attachment of leaf with the shoot is called---------- ?

A) Pith.
B) Pit.
C) Pulvinus
D) Ecdysone

ANSWER= (C) Pulvinus
Explain:-

 

27. Which of the following is a uni-nucleated cell ?

A)A smooth muscle cell.
B) A cardiac muscle cell.
C)A skeletal muscle cell.
D)All of these

ANSWER= (A) A smooth muscle cell.
Explain:-

 

28. Rapid movement of leaves of mimosa on touching is an example of -------------

A)Turgor movement
B) Nastic movement
C) Tropic movements.
D) Growth movement

ANSWER= (A) Turgor movement
Explain:-

 

29. The contraction of which of the following muscle fibers, is controlled by hormones ?

A)A smooth muscle
B)A cardiac muscle
C)A skeletal muscle.
D)All of these

ANSWER= (A) A smooth muscle
Explain:-

 

30. Roots of a plant show-------------- ?

A)Positive phototropism and negative geotropism
B) Negative phototropism and positive geotropism
C) Negative tactic movement and positive tropic movement
D) Positive geotropism of stem and roots

ANSWER= (B) Negative phototropism and positive geotropism
Explain:-

 

31. Why skeletal muscles are called striated muscles ?

A) They appear darker than smooth muscles by naked eye.
B)Alternating dark and light bands appear on their surface when visualized by naked eye.
C)Alternating dark and light bands appear on their surface when visualized via a microscope
D)All of these

ANSWER= (C) Alternating dark and light bands appear on their surface when visualized via a microscope
Explain:-

 

32 .Epinasty is controlled by------------- ?

A) Gibberellins
B) Abscisins
C) Auxins
D) Cytokinins

ANSWER= (C) Auxins
Explain:-

 

33. Which of the following statements is incorrect about skeletal muscle fibers ?

A) They are multinucleated.
B) They are 10 – 100 ?m in diameter & surrounded by sarcolemma
C) They contain O2 storing molecules called hemoglobin.
D) Their cytoplasm contains high concentration of carbohydrates

ANSWER= (C) They contain O2 storing molecules called hemoglobin.
Explain:-

 

34. Gibberellins is an example of----------------- ?

A)Growth inhibitor
B)Growth stimulator
C)Growth hormone
D)None of these

ANSWER= (B) Growth stimulator
Explain:-

 

35. A smallest contractile unit of muscle contraction called sarcomere is the area between two:

A)H- zone
B)M- Line
C)Z- Line
D)Z- Line

ANSWER= (C) Z- Line
Explain:-

 

36. Which of the following animal has a hydrostatic skeleton ?

A) Earthworm
B) Round worm
C) Tape worm
D) Pin worm

ANSWER= (A) Earthworm
Explain:-

 

37. Diameter of thick filament is------------ ?

A) 7nm
B) 8nm
C) 16nm
D) 10-100m

ANSWER= (C) 16nm
Explain:-

 

38. In an annelids, the contraction of circular muscle results in----------- ?

A)Lengthening of the body.
B)Shortening of the body
C)Widening of body
D)Thinning of body

ANSWER= (D) Thinning of body
Explain:-

 

39. The most important function of troponin is----------- ?

A) To bind with actin
B) To bind with tropomyosin.
C) To bind with Ca2+ ions.
D) All of these

ANSWER= (D) All of these
Explain:-

 

40. Which of the following statement is incorrect about Molluscans ?

A) They are surrounded by single or double pieces of hard skeleton.
B) Their shell grows as the animal grows.
C) They have hydrostatic skeleton.
D) They move by tube feet

ANSWER= (D) They move by tube feet
Explain:-

 

41. If a cross section of a sarcomere is seen, each myosin is surrounded by how many actin molecules:

A) 9
B) 5
C) 6
D) 7

ANSWER= (C) 6
Explain:-

 

42. Which one of the following forms the blk of exoskeleton of an arthropod ?

A) Epicuticle
B) Procuticle
C) Ectocuticle
D) None of these

ANSWER= (B) Procuticle
Explain:-

 

43. What happens during muscle contraction to the length of each myosin and action filament ?

A)Z- lines get closer
B)A band becomes short
C)1 band elongates
D)There is no change in sarcomere

ANSWER= (A) Z- lines get closer
Explain:-

 

44. Which of the following step occurs immediately after binding of Ca2+ with troponin molecule during muscle contraction.

A)Binding sites of actin get attached to the myosin head.
B)Troponin uncovers the actin binding sites
C)Tropomyosin gets removed from the binding sites of actin filaments.
D)Ca2+ goes back inside sarcoplasmic reticulum

ANSWER= (C) Tropomyosin gets removed from the binding sites of actin filaments.
Explain:-

 

45. Exoskeleton of a marine snail is composed of---------------- ?

A)CaPO4
B)CaCO3
C)CaSO4
D)SiO2

ANSWER= (B) CaCO3
Explain:-

 

46. Rigor mortis i.e, stiffening of body after death results from---------- ?

A)Accunulation of rigid proteins molecules in sarcoplam.
B)Unavailability of ATP, which is necessary to break the link between actin and myosin.
C)Decrease in body temperature after death.
D)Death of tissue due to unavailability of O2

ANSWER= (B) Unavailability of ATP, which is necessary to break the link between actin and myosin.
Explain:-

 

47. Which of the following statement about an arthropod exoskeleton is incorrect ?

A)It permits gaseous exchange
B)It contains joints, for the same purpose as present in human skeletal system
C)It provides muscle attachment
D). Like all the other types of exoskeleton, they lack sensation

ANSWER= (B) It contains joints, for the same purpose as present in human skeletal system
Explain:-

 

48. Ecdysone is----------------- ?

A)An enzyme that digest endocuticle during an arthropodal ecdysis
B) A newly formed exoskeleton in authropods
C) A hormone that regulates moulting in arthropods
D) A process that involves moulting

ANSWER= (C) A hormone that regulates moulting in arthropods
Explain:-

 

49. Endoskeleton is secreted by ?

A)Ectoderm.
B)Endoderm.
C) Mesoderm
D) All of these

ANSWER= (C) Mesoderm
Explain:-

 

50. Which of the following statement about fatigue is correct ?

A)The major event in it is accumulation of lactic acid.
B)Lactic acid accumulation turns pH in acidic range leading to muscle ache
C) Ionic imbalance may also cause it.
D) All of these

ANSWER= (D) All of these
Explain:-

 

51. Tetany is caused by---------- ?

A) Hypocalcemia
B) Hypercalcemia
C) Clostridum tetani.
D) Low O2 level

ANSWER= (A) Hypocalcemia
Explain:-

 

52. Collagen fibers of bone are hardened by deposition of------------- ?

A) Ca & PO4
B) CaCO3
C) CaSO4
D) SiO2

ANSWER= (A) Ca & PO4
Explain:-

 

53. Which one of the following is an example of a non-elastic connective tissue ?

A)Ligaments.
B)Tendon
C)Muscles
D)None of these

ANSWER= (B) Tendon
Explain:-

 

54. Which one of the following is avascular structure ?

A)A compact bone.
B)A spongy bone.
C) Cartilage
D)All of these

ANSWER= (C) Cartilage
Explain:-

 

55. Which of the following muscle is an antagonistic member of Biceps brachii ?

A)Bracheoradialis
B)Brachialis.
C)Intercostals
D)Triceps

ANSWER= (D) Triceps
Explain:-

 

56. Which of the following bone is not present in the hind-limb ?

A)Femur
B)Tibia
C)Radius
D)Fibula

ANSWER= (C) Radius
Explain:-

 

57. Insertion of Biceps is on--------- ?

A)Ulna
B)Radius
C)Olecronon process of ulna.
D)Scapula

ANSWER= (B) Radius
Explain:-

 

58. How many bones are present in the wrist ?

A)4 bones
B)6 bones
C)8 bones
D)14 bones

ANSWER= (B) 8 bones
Explain:-

 

59. Which of the following statement is incorrect regarding the locomotion in Euglena ?

A)Move with the help of flagellum, attached to the anterior pole of the body.
B)Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward
C)Myonemes can change the direction of the body by making it to shorten from anterior to the posterior pole.
D) None of these

ANSWER= (B) Flagellum whipping backwards moving the organism forward, and when moves forward the organism moves backward
Explain:-

 

60. Which of the following bones bones are present in the plam of hand ?

A) . Carpals
B) Metacarpals
C) Phalanges
D) Metatarsals

ANSWER= (B) Metacarpals
Explain:-

 

61. Which of the following animal uses Setae and Muscles for their Iocomotion ?

A) Cockroach
B) snail
C) Earthworm
D) Starfish

ANSWER= (C) Earthworm
Explain:-

 

62. How many vertebrae are present in vertebral column of man

A) 33 vertebrae
B) 33 pairs of vertebrae
C) 25 vertebrae
D) 31 vertebrae

ANSWER= (A) 33 vertebrae
Explain:-

 

63. Which of the following vertebrates have a fish-like body ?

A) Reptiles
B) Aves
C) Amphibians
D) Mammals.

ANSWER= (C) Amphibians
Explain:-

 

64. How many vertebrae are present in coccyx ?

A)7
B) 12
C) 9
D) 4

ANSWER= (A) 7
Explain:-

 

65. Which of the following pairs of fins in a fish body are paired ?

A) Dorsal and ventral.
B) Pectoral and Pelvic
C) Tail and anal
D) All of these

ANSWER= (B) Pectoral and Pelvic
Explain:-

 

66. How many vertebrae are present in thoracic region ?

A) 7
B) 12
C) 5
D) 4

ANSWER= (B) 12
Explain:-

 

67. Among the following organisms which shows the best adaptations for locomotion ?

A) Amoeba.
B) Eartworm
C) Reptiles
D) Amphibians.

ANSWER= (C) Reptiles
Explain:-

 

68. How many vertebrae are in sacrum ?

A) 7.
B) 12
C) 5
D) 4

ANSWER= (C) 5
Explain:-

 

69. Which of the following is the swiftest form of the locomotion ?

A) Plantigrade
B) Digitigrade
C) Unguligrade
D) Hopping

ANSWER= (C) Unguligrade
Explain:-

 

70. S-band locomotion is characteristically seen in----------- ?

A)Bony fish
B)Cartilaginous fish.
C)Fish like animals
D) All of these

ANSWER= (B) Cartilaginous fish.
Explain:-

 

71. How many vertebrae are present in lumbar region ?

A) 7
B) 12
C) 5
D) 4

ANSWER= (C) 5
Explain:-

 

72. Which of the following bones are present in pectoral girdle ?

A) Clavicle
B) Scapula
C) Both of these
D) None of these

ANSWER= (C) 5
Explain:-

 

73. There are ---------- types of nutrients needed by plants besides light to carry out photosynthesis

A) 2
B)3
C)4
D)5

ANSWER= (B) 3
Explain:-

 

74. The site/s where most of the uptake of water and minerals take place is/are---------- ?

A) Root hairs
B) Root cells
C) Underground stem
D) All of these

ANSWER= (A) Root hairs
Explain:-

 

75. The uptake of water in plants involves---------- ?

A) Active transport
B) Passive transport
C) All of these
D) None of these

ANSWER= (B) Passive transport
Explain:-

 

76. The membrane of vacuoles is known as---------- ?

A) Vacuoloplast
B) Tonoplast
C) Tanoplast
D) All of these

ANSWER= (B) Tonoplast
Explain:-

 

77. The diffusion of ions along with water also takes place by mass flow system along the -------- path ?

A) Tonoplast
B) Apoplast
C) Symplast
D) Vacuolar

ANSWER= (B) Apoplast
Explain:-

 

78. Active transport is dependent on------------ ?

A) Photosynthesi
B) Respiration
C) Photophosporylation
D) None of these

ANSWER= (B) Respiration
Explain:-

 

79. In plants, the neighbouring cells are connected with one another by---------- ?

A) Plasmodesmata
B) Cell walls
C) Vacuoles
D) Both A and B

ANSWER= (D) Both A and B
Explain:-

 

80. In the root cells ------- pathway becomes discontinuous in the endodermis due to the presence of casparian strip.

A) Tonoplast
B) Apoplast
C) Symplast
D) Vacuolar.

ANSWER= (B) Apoplast
Explain:-

 

81. Cytoplasmic strands that extend through pores in adjacent cell walls are known as----------- ?

A) Pseudopods
B) Symplasts
C) Plasmodesmata
D) Pili

ANSWER= (C) Plasmodesmata
Explain:-

 

82. In plants, water potential is determined by major factors ?

A) Three
B) Four
C) Two
D) Five

ANSWER= (C) Two
Explain:-

 

83. The pressure generated when water enters & inflates plant cells is called ----------- potential ?

A) Water
B) Osmotic
C) Pressure
D) Solute

ANSWER= (C) Pressure
Explain:-

 

 

84. The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

A) Deffusion
B) Osmosis
C) Active transport
D) None of these

ANSWER= (B)Osmosis
Explain:-

A) Water
B) Osmotic
C) Pressure
D) Solute

ANSWER= (C) Pressure
Explain:-

 

85. ----------- potential is the measure of the change in water potential of a system due to the presence of solute molecules ?

A) Osmotic
B) Pressure
C) Both of these
D) None of these

ANSWER= (A) Osmotic
Explain:-

 

86. ----------- component of cell wall has grreat affinity with water ?

A) Lignin
B) Cellulose
C) Pectin
D) All of these

ANSWER= (D) All of these
Explain:-

 

87. Commonly in other plants than tall ones the speed of upward movement of water is------------ ?

A) 8mh-1
B) 1 mh-1
C) 7 mh-1
D) 4 mh-1

ANSWER= (B) 1 mh-1
Explain:-

 

88. Exceptionally the positive hydrostatic pressure generated by root pressure is about----------- ?

A) 600 Kpa
B) 800 kpa
C) 1000 kpa
D) 900 kpa

ANSWER= (B) 800 kpa
Explain:-

 

89. Cuticular transpiration is --------- of total transpiration ?

A) 6-8%
B) 5-7%
C) 7-9%
D) 4-6%

ANSWER= (B) 5-7%
Explain:-

 

90. All plants do not possess----------- ?

A) Lenticels
B) Cuticle
C) Stomata
D) All of these

ANSWER= (A) Lenticels
Explain:-

 

91. Lenticular transpiration is ----------- of total transpiration ?

A) 2-3%
B) 1-3%
C) 1-4%
D) 1-2%

ANSWER= (D) 1-2%
Explain:-

 

92. Introduction of vaccine within the body to produce immunity is an example of------------ ?

A) Artificially induced active immunity
B) Naturally induced active immunity
C) Artificially induced passive immunity
D) Naturally induced passive immunity

ANSWER= (A) Artificially induced active immunity
Explain:-

 

93. The flow of lymph is maintained by---------- ?

A) Movement of viscera
B) Breathing movements
C)Valves
D) All of these

ANSWER= (D) All of these
Explain:-

 

94. It is the discharge of blood from blood vessels ?

A) Myocardial infarction
B) Cerebral infarction
C) Cerebral Hemorrhage
D) Thromboembolism

ANSWER= (C) Cerebral Hemorrhage
Explain:-

 

95. All of the follwing are blood clots except:----------- ?

A)Thrombus
B)Embolus
C)Atheroma
D)Hematoma

ANSWER= (C) Atheroma
Explain:-

 

96. It is the measure of force with which blood pushes up against the walls of blood vessels.

A)Stroke volume
B)Cardiac output
C)Blood pressure
D)Blood flow

ANSWER= (C) Blood pressure
Explain:-

 

97. Which of the following have thickest walls ?

A)Arteries
B)Veins
C)Capillaries
D)None of these

ANSWER= (A)Arteries
Explain:-

 

98. QRS complex represents------------ ?

A)Atrial systole
B)Ventricular systole
C)Atrial diastole
D)Ventricular diastole

ANSWER= (B)Ventricular systole
Explain:-

 

99. Tricuspid valve is present------------- ?

A)Between right atrium and right ventricle
B)Between left atrium and left ventricle
C)At base of pulmonary artery
D)At base of aorta

ANSWER= (A)Between right atrium and right ventricle
Explain:-

 

100. Cooley’s anemia is another name used for----------- ?

A)Leucemia
B)Thalassaemia
C)Sickle cell anemia
D)None of these

ANSWER= (B)Thalassaemia
Explain:-