1. Clotting of the blood is delayed by
Prothrombin Heparin Vitamin K Calcium (b ) Heparin is an anticoagulant that delays blood clotting. 2. Connective tissue is originated from
Endoderm Mesoderm Ectoderm Ecto-mesoderm (b ) Connective tissues arise from the mesodermal layer of the embryo. 3. Which of the following is exoskeleton in invertebrate
Chitin Melanophore Keratin Melanin (a ) Chitin is a polysaccharide that forms the exoskeleton of arthropods and other invertebrates. 4. Which one of the following is a part of pelvic girdle
Acetabulum Greater tubersotiy Lesser tubersoty Femur (a ) The acetabulum is the socket in the pelvic girdle where the femur articulates. 5. Typhoid in human being is caused by
Retrovirus Salmonella Shigella Vibrio (b ) Typhoid fever is caused by the bacterium Salmonella typhi. 6. Which one of the following belongs to mollusca
Cuttle fish Gold fish Silver fish Starfish (a ) Cuttlefish are marine mollusks of the class Cephalopoda. 7. The skull of frog and rabbit is
Dicondylic Monocondylic Tricondylic Tetracondylic (a ) The skull of frog and rabbit is dicondylic, meaning it has two occipital condyles. 8. Fish migrating from sea water to fresh water for breeding is called
Anadromous Catadromous Amphidromous Oceanodromus (a ) Anadromous fish migrate from the sea to freshwater to spawn (e.g., salmon). 9. The function of pituitary gland is controlled by
Hypothalamus Pineal glands Cerebrum Cerebellum (a ) The hypothalamus regulates the pituitary gland through releasing and inhibiting hormones. 10. Blood is
Connective tissue Muscular tissue Epithelial tissue Nervous tissue (a ) Blood is a fluid connective tissue composed of plasma and formed elements (RBCs, WBCs, platelets). 11. The study of the nuclear cytology is called
Serology Embryology Karyology Physiology (c ) Karyology is the study of cell nuclei, particularly chromosomes. 12. Histamine is secreted by
Mast cell Osteoblast Fibroblast Macrophage (a ) Mast cells release histamine during allergic reactions and inflammation. 13. Antibodies are principally produced by
Spleen Lymphoid tissue Liver Bone marrow (b ) Antibodies are produced by B-lymphocytes in lymphoid tissues (e.g., lymph nodes, spleen). 14. Evenly distributed yolk is called
Meiolecithal Homolecithal Mesolecithal Telocithal (b ) Homolecithal (or isolecithal) eggs have evenly distributed yolk (e.g., mammals). 15. Which one is the sensory organ of rabbit?
Statocyst Jacobson's organ Osphradium Johnston's organ (b ) Jacobson's organ (vomeronasal organ) detects pheromones and is found in rabbits and other vertebrates. 16. Motile, elongated zygote of plasmodium is found in
Gut of mosquito RBC of human Liver of human Salivary glands of mosquito (a ) The ookinete (motile zygote) forms in the mosquito's gut after fertilization. 17. Bidder's canal in frog is found in relation to:
(b ) Bidder's canal is present in the testes of male frogs and helps transport sperm. 18. The membrane that covers the cartilage is known as:
Perichondrium Perisoteum Pericardium Perineurium (a ) Perichondrium is the fibrous connective tissue layer surrounding cartilage. 19. In man, nodules of lymphoid tissue (Payer's patches) are found in
Oesophagus Ileum Rectum Colon (b ) Peyer's patches are aggregated lymphoid nodules in the ileum (small intestine). 20. Gerontology is the study of
Regeneration Ageing Death Growth (b ) Gerontology focuses on the biological, psychological, and social aspects of aging. 21. Coral reef is formed by
Echinoderms Helminthes Molluscs Coelenterates (d ) Coral reefs are formed by colonial cnidarians (coelenterates) like coral polyps. 22. Polymorphism is characteristics of the phylum:
Coelenterata Annelida Porifera Protozoa (a ) Polymorphism (e.g., polyp and medusa forms) is seen in coelenterates (Cnidaria). 23. Response of organisms to stimulus of touch is called
Phototaxis Thermotaxis Thigmotaxis Hydrotaxis (c ) Thigmotaxis is the movement response to touch or physical contact. 24. The right auricular-ventricular aperture in rabbit is guarded by
Tricuspid valve Spiral valve Bicuspid valve Semilunar valve (a ) The right atrioventricular valve in rabbits is tricuspid (three cusps). 25. Earthworm appears brown due to presence of
Creatinine Porphyrin Chloragogen cells Melanin (b ) Porphyrin pigments (e.g., chlorocruorin) give earthworms their brown color. 26. Mature gametocytes of plasmodium are found in
Human stomach Stomach of female anopheles Human blood Blood of female anopheles (c ) Mature gametocytes of Plasmodium develop in human red blood cells (RBCs). 27. Which one of the following vertebra is fused
Sacrum Cervival Thoracic Lumbar (a ) The sacrum is formed by the fusion of 5 sacral vertebrae. 28. Blastopore in vertebrates developed into
Anus Mouth Nasal cavity Body cavity (a ) In deuterostomes (vertebrates), the blastopore becomes the anus. 29. Which of the following parasite causes iron (Fe) deficiency anaemia?
Pinworm Round worm Hook worm Tape worm (c ) Hookworms (e.g., Ancylostoma) feed on blood, leading to iron deficiency anemia. 30. Transitional epithelium is found in
Urinary bladder Liver Kidney Oesophagus (a ) Transitional epithelium lines the urinary bladder, allowing stretch and recoil. 31. Which of the following is a regular flower?
Brassica campestris Solanum nigrum Pisum sativum Vicia faba (c ) Pisum sativum (pea) has radially symmetrical (actinomorphic/regular) flowers. 32. The layer of the cell wall that is formed soon after the cell division and is composed of calcium pectate is
Primary cell wall Secondary cell wall Cell coat Middle lamella (d ) The middle lamella is a pectin-rich layer formed between daughter cells after division. 33. Which one is characteristic sugar of DNA
Deoxyribose Deoxyhexose Ribose Hexose (a ) DNA contains deoxyribose sugar, while RNA contains ribose. 34. The fungus absorbs the food by:
Mycelium Root Rhizome Thallus (a ) Fungi absorb nutrients through their hyphal network (mycelium). 35. Apomixis is development of a new plant:
From stem cuttings From root cuttings Without fusion of gametes From fusion of gametes (c ) Apomixis is asexual seed formation without fertilization (e.g., in some grasses). 36. Alcohol fermentation takes place in the presence of
Zymase Invertase Maltase Amylase (a ) Zymase (enzyme complex in yeast) converts sugars to ethanol and CO₂. 37. Pyruvic acid is changed to CO2 and H2O in
Kreb's cycle Glycolysis Fermentation Calvin cycle (a ) Pyruvate is fully oxidized in the Krebs (TCA) cycle in mitochondria. 38. Nucleic acid is polymer of
Globulins Nucleotides Nucleoproteins Nucleosides (b ) Nucleic acids (DNA/RNA) are polymers of nucleotide monomers. 39. The process of photolysis of water takes place during
Electron transport system Photophosphorylation Dark reaction Light reaction (d ) Water splits (photolysis) in Photosystem II during the light-dependent reactions. 40. Grafting is not possible in monocotyledons because they
Are herbaceous Have scattered vascular bundles Lack endodermis and pith Lack cambium (d ) Monocots lack vascular cambium, preventing graft union formation. 41. The main significance of M-phase of the cell cycle is:
Fusion of DNA Physical separation of replicated DNA molecules Reduction in chromosome number Replication of cell organelles (b ) M-phase (mitosis) ensures equal distribution of chromosomes to daughter cells. 42. When pollination occurs between neighbouring flowers of the same plant:
Xenogamy Allogamy Geitonogamy Cleistogamy (c ) Geitonogamy is pollination between flowers of the same plant (genetically self-pollination). 43. The edible part of apple and pear is:
Thalamus Epicarp Mesocarp Endocarp (a ) The fleshy thalamus (receptacle) is edible in pomes (apple, pear). 44. Milky water of green coconut is
Liquid endosperm Liquid of female plant Liquid nucellus Liquid chalaza (a ) Coconut water is the liquid endosperm in developing seeds. 45. Pteridophytes differ from bryophytes in possessing
Alternation of generation Archegonia Vascular tissue Spores (c ) Pteridophytes have xylem and phloem, unlike non-vascular bryophytes. 46. Insectivorous plants generally grown on areas where there is scarcity of:
(d ) Carnivorous plants trap insects to compensate for nitrogen deficiency in poor soils. 47. An embryo sac of a flowering plant has
4 haploid nuclei 4 diploid nuclei 8 haploid nuclei 8 diploid nuclei (c ) A mature embryo sac (female gametophyte) contains 8 haploid nuclei. 48. Which one of the following is a free living aerobic nitrogen fixing bacteria
Azotobacter Rhizobium Clostridium Anabaena (a ) Azotobacter is a free-living, aerobic N₂-fixing soil bacterium. 49. The formation of fruit in absence of fertilization is
Parthenogenesis Parthenocarpy Polyembryony Polygamy (b ) Parthenocarpy produces seedless fruits (e.g., banana) without fertilization. 50. Gymnosperms are regarded as naked seeded plants because they lack
Ovule Ovary Seed coat Sporophylls (b ) Gymnosperm seeds are exposed (not enclosed in an ovary/fruit). 51. Separation of two substances by fractional crystallization depends upon
Crystalline shape Viscosity Solubility Density (c ) Fractional crystallization exploits differences in solubility upon cooling. 52. The Normality of a solution containing 5 gm NaOH per litre is:
(a ) Normality = (5 g/L) / (40 g/mol) = 0.125 N (NaOH has n=1 for OH⁻). 53. The intermixing of gases is generally accompanied by:
Change in heat energy Increase in free energy Decrease in free energy Constant free energy (c ) Mixing reduces Gibbs free energy (ΔG < 0), making it spontaneous. 54. Which of the following is the most basic compound:
Acetanilide P-nitro aniline Benzylamine Aniline (c ) Benzylamine (R-NH₂) is more basic than aniline (Ph-NH₂) due to lack of resonance. 55. Blood is isotonic with:
Saturated solution of mixture of NaCl and KCl Saturated NaCl solution Saturated KCl solution Normal saline solution (d ) Normal saline (0.9% NaCl) matches blood's osmotic pressure. 56. Compound formed by sp3 hybridization will have structure:
Tetrahedral Pyramidal Trigonal Planar (a ) sp³ hybridization yields tetrahedral geometry (e.g., CH₄). 57. A solution of sulphur dioxide in water reacts with hydrogen sulphide precipitating sulphur where SO2 acts as
An acid A catalyst An oxidizing agent A reducing agent (c ) SO₂ oxidizes H₂S to S: SO₂ + 2H₂S → 3S + 2H₂O. 58. When ammonium chloride is added to a solution of ammonium hydroxide:
The conc. Of NH4+ and OH- increases The conc. Of OH- increases The conc. Of OH- decreases The dissociation of NH4OH increases (c ) NH₄Cl suppresses NH₄OH dissociation (common ion effect), reducing [OH⁻]. 59. When phenol is reacted with PCl5, the product obtained is/ are:
Mixture of chlorobenzene and benzoyl chloride Mixture of chlorobenzene and triphenyl phosphate Benzyl chloride Chlorobenzene (b ) PCl5 converts phenol to chlorobenzene and (C₆H₅O)₃PO (triphenyl phosphate). 60. When NH3 gas is passes into Mercurous nitrate solution:
Black colour of Hg(NH2)NO3 and Hg is formed Black colour of Hg(NH2)NO3 is formed Reddish brown HgO.NH2 is formed Black colour of Hg(NH2)NO3 is formed (a ) 2Hg₂(NO₃)₂ + 4NH₃ → Hg(NH₂)NO₃ (black) + Hg (black) + 3NH₄NO₃. 61. In which of the following reactions, H2 is acting as oxidizing agent?
H₂ + Cl₂ → 2HCl N₂ + 3H₂ → 2NH₃ Ca + H₂ → CaH₂ CuO + H₂ → Cu + H₂O (c ) In CaH₂ formation, H₂ gains electrons (oxidizing agent). 62. The normality of solution containing 6.36 gram of Na₂CO₃ in 600 ml of it is
(d ) Normality = (6.36 g / 53 g/eq) / 0.6 L = 0.2 N (n=2 for CO₃²⁻). 63. What will be the molarity of the solution containing 5 gm of sodium hydroxide in 250 ml solution
(c ) Molarity = (5 g / 40 g/mol) / 0.25 L = 0.5 M. 64. A catalyst accelerates reaction because:
It increases the activation energy It forms complex with one of the reactant It lower the activation energy It brings the reactant close (c ) Catalysts provide an alternative pathway with lower activation energy (Eₐ). 65. Which of the following will show common ion effect?
HCl + HNO₃ HCl + H₂SO₄ HCl + NaCl HCl + H₂S (c ) NaCl adds Cl⁻ ions, suppressing HCl dissociation (common ion effect). 66. With the rise in temperature, surface tension
Increases Decreases Remains the same Becomes zero (b ) Surface tension decreases as temperature increases (reduced intermolecular forces). 67. When nitrobenzene is treated with Zinc-dust and aq. NH4Cl, it gives
Hydroxylamine Phenyl hydroxylamine Azoxy benzene Aniline (b ) C₆H₅NO₂ + 4[H] → C₆H₅NHOH (phenyl hydroxylamine). 68. The molality of 15% (w/v) of a solution of H2SO4 (density = 1.1 g/cc) is:
(d ) Molality = (15 g / 98 g/mol) / (100 g / 1.1 g/mL) ≈ 1.8 m. 69. Heterolytic cleavage of carbon-carbon bond produces:
2 carbonium ions Two free radicals One cation and one carbanion A free radical and a carbanion (c ) Heterolytic cleavage yields ions (e.g., R⁺ and R⁻). 70. The formation of cyanohydrins from ketone is an example of:
Electrophilic substitution Nucleophilic substitution Nucleophilic addition Free radical addition (c ) CN⁻ adds to C=O (nucleophilic addition) to form R₂C(OH)CN. 71. Emulsion is a colloidal system of:
Two liquids Two solids One gas and solid One gas and liquid (a ) Emulsions are liquid-liquid colloids (e.g., oil in water). 72. Hydrogen bonding is not present in:
(b ) H₂S lacks significant H-bonding due to low electronegativity of S. 73. The binary compound of oxygen and fluorine are called fluorides not oxide because:
Fluorine is more electronegative than oxygen Size of fluorine is small than oxygen Reducing power of fluorine is greater than oxygen They contain fluoride ions (a ) In OF₂, F is more electronegative, so it's oxygen difluoride, not fluoride oxide. 74. Propene can be distinguished from propyne by using:
Ammonical silver nitrate Bayer's reagent Bromine water Fehling's reagent (a ) AgNO₃/NH₃ reacts with terminal alkyne (propyne) to form white precipitate. 75. Magnetic quantum number gives:
Nuclear stability Orbital orientation Shape of orbital Size of orbital (b ) mₗ determines orbital orientation in space (-l to +l). 76. Which of the following is a nucleophile
(a ) H₂O is a nucleophile (lone pair donor). 77. Alkaline hydrolysis of fat is known as:
Acetylation Esterification Saponification Alkylation (c ) Saponification converts fats to soap (carboxylates) and glycerol. 78. Which of the following is most reactive towards Nitration?
Nitrobenzene Toluene Benzene Benzoic acid (b ) Toluene's -CH₃ group activates the ring for electrophilic substitution. 79. Highly pure dilute solution of sodium in liquid ammonia acts as:
Oxidising agent Dehydrating agent Reducing agent Catalyst (c ) Na/NH₃(l) is a strong reducing agent (solvated electrons). 80. The volume of water to be added to 100 cm³ of 1/2 N H₂SO₄ to get decinormal concentration is:
100 cm³ 450 cm³ 400 cm³ 500 cm³ (c ) N₁V₁ = N₂V₂ → 0.5×100 = 0.1×V₂ → V₂=500 cm³. Add 400 cm³ water. 81. A fielder can throw a cricket ball to a maximum horizontal distance of 100 m. How high the fielder can throw the same ball?
(b ) R_max = u²/g = 100 m → H_max = u²/(2g) = 50 m. 82. A liquid is placed in a graduated glass cylinder. The coefficient of real expansion of the liquid is thrice that of linear expansion of the glass. On heating the level of liquid will
First decrease then increase Decrease Increase Approximately remains the same (c ) γ_liquid = 3α_glass → apparent expansion = 3α - α > 0 → level rises. 83. The polarizing angle between reflected and refracted rays is
(c ) At Brewster's angle, reflected and refracted rays are perpendicular. 84. The direction of the two forces 6N and 2N acting on a body of mass 2 kg, the minimum acceleration of the body cannot be less than
2 m/s² 3 m/s² 2.5 m/s² 4 m/s² (a ) a_min = (6-2)/2 = 2 m/s² (opposite forces). 85. At the same temperature, pressure and volume of two gases, which of the following quantities is constant?
Total number of molecules Root mean square velocity Average kinetic energy Mean free path (c ) KE_avg = (3/2)kT depends only on temperature. 86. A positively charged particles moving due east enters a region of uniform magnetic field directed vertically upwards. The particle will
Get deflected vertically upwards Move in a circular orbit with its speed increases Move in a circular orbit with its speed unchanged Continue to move due east (c ) F = qvB (centripetal force) → circular motion at constant speed. 87. Which of the following is always conserved in collision?
Kinetic energy Angular momentum Linear momentum Torque (c ) Linear momentum is conserved in all collisions (elastic/inelastic). 88. A boat having length of 3m and breadth 2m is floating on lake. The boat sinks by 1 cm when a man is on it. The mass of the man is:
(a ) Mass = ρV = 1000 kg/m³ × (3×2×0.01) = 60 kg. 89. If no internal force is applied in a body the velocity of the centre of mass:
Zero Increases Decrease Remains constant (d ) F_ext = 0 → a_cm = 0 → v_cm = constant. 90. A source and listener is moving in the same direction with a velocity equal to half the velocity of sound. What is the change in frequency.
(a ) f' = f(v ± v_o)/(v ∓ v_s) → v_o = v_s → f' = f (no change). 91. In D.C. circuit power dissipated per unit volume is proportional to:
Current Resistance Square of electric field Electric field (c ) P/V = J·E = σE² (J = current density, σ = conductivity). 92. The product of moment of inertia and angular acceleration gives.
Linear momentum Angular momentum Torque Force (c ) τ = Iα (rotational analogue of F = ma). 93. When a rod of length 2 m carrying current of 10 A is placed perpendicular to magnetic flux density of strength 0.15 T. What is the force experienced by it?
(d ) F = ILB = 10 × 2 × 0.15 = 3 N. 94. If the biconvex lens is silvered on one side then it will behave as:
Concave mirror Convex mirror Plane mirror Converging lens (a ) Silvered lens acts as a concave mirror with equivalent power P = 2P_lens + P_mirror. 95. A current is flowing through a circular wire in clockwise direction. What will be the direction of magnetic lines of force:
Parallel to the plane of the coil Perpendicular to the plane of the coil away from the reader Perpendicular to the plane of the coil towards the reader At any angle (b ) Right-hand rule: clockwise current → B-field lines point away from observer. 96. A body travels with velocity 30 m/s for 1st half of time and with velocity 40 m/s for 2nd half of time then what would be average velocity
(b ) v_avg = (v₁ + v₂)/2 = (30 + 40)/2 = 35 m/s. 97. When two tuning forks of frequencies 484 Hz and 486 Hz are sounded together. What will be beat frequency?
(b ) Beat frequency = |f₁ - f₂| = 2 Hz. 98. The intensity of sound at night increases because of
Low temperature Increase in density Decrease in density Calmness (a ) Cooler air is denser, improving sound propagation. 99. In a dynamo, voltage is 6V current 0.5 A. what is the power generated?
(c ) P = VI = 6 × 0.5 = 3 W. 100. The internal structure of crystal can be studied by
X-rays γ-rays IR rays UV rays (a ) X-ray diffraction reveals crystal lattice structure. 