(a) Benign tertian malaria is caused by the protozoan parasite Plasmodium vivax.
2. Ophiology is the study of
lizard
frog
snake
fish
(c) Ophiology is the branch of zoology that deals with the study of snakes.
3. The faces of rabbit is dark brown or black and moist during night and yellowish brown and dry during day time because:
There is less absorption of water by atmosphere during night time
Not secretion of bile juice during night
Cellulose doesn't digest completely and so the faces are re-ingested
. It takes different food during day and night time
(c) Rabbits practice coprophagy, re-ingesting their soft, cecal feces (night droppings) which are rich in nutrients due to incomplete digestion of cellulose.
4. The pupa of mosquito is called
Maggot
Tumbler
Imago
Waggot
(b) The pupa of a mosquito is called a tumbler due to its tumbling movement in the water.
5. The intermediate host of liver fluke is:
Man
Sheep
Dog
Snail
(d) The intermediate host of the liver fluke (Fasciola hepatica) is typically a snail.
6. Thermoregulatory centre is found in:
diencephalon
cerebellum
hypothalamus
occipital lobe
(c) The hypothalamus in the brain contains the thermoregulatory center that controls body temperature.
7. Owls move freely during the night because they have:
Only cones in their retina
Only rods in their retina
Plenty of vitamin A
Adjustable pupil
(b) Owls are nocturnal and have a high concentration of rod cells in their retina, which are highly sensitive to light and enable them to see well in low-light conditions.
8. The area of most active vision in eye where sharp image is formed is called:
Blind spot
Yellow spot
Lens
Pupil
(b) The yellow spot (macula lutea) in the retina, containing the fovea centralis, is the area of most acute vision where sharp images are formed.
9. Cells sensitive to sound vibrations are found In:
Middle ear
Organ of Corti
Sacculus
Utriculus
(b) Hair cells sensitive to sound vibrations are located in the organ of Corti within the cochlea of the inner ear.
10. The gland involved in the formation of thread in spider is
spinnerets
thymus gland
Cowper's gland
coxal gland
(a) Spiders produce silk threads using spinnerets, which are specialized appendages located at the end of their abdomen.
11. Number of heart in Earthworm is
1 pair
2 pairs
3 pairs
4 pairs
(d) Earthworms have four pairs of lateral hearts (also known as aortic arches) that pump blood.
12. Bacteriophage are:
Bacteria
Fungi
Viruses
Algae
(c) Bacteriophages are viruses that specifically infect bacteria.
13. Genetically dwarf plants can be made long by the application of:
Auxins
Cytokinins
Gibberellins
Vernalin
(c) Gibberellins are plant hormones that promote stem elongation and can cause genetically dwarf plants to grow taller.
14. Which of the following is parasitic form of algae ?
Spirogyra
Cephaleorus
Oedogonium
Oscillatoria
(b) Cephaleuros is a genus of parasitic algae that causes diseases in plants.
15. Prokaryotic cell structure is found in:
Chlamydomonas
Nostoc
Spirogyra
Vaucheria
(b) Nostoc is a genus of cyanobacteria, which are prokaryotic organisms.
16. The bacteria found in root nodules of leguminoseae is:
Rhizobium
Bacillus
Thiobacillus
Clostridium
(a) Rhizobium bacteria are found in the root nodules of leguminous plants, where they fix atmospheric nitrogen.
17. Veinablastin is obtained from
Achras zapota
Claviceps
Catharasithus
All of the above
(c) Vinblastine (veinablastin) is an alkaloid obtained from the Madagascar periwinkle plant, Catharanthus roseus (formerly Vinca rosea).
18. The xylem in root is
exarch
endarch
both
none
(a) The xylem in roots of plants typically exhibits exarch arrangement, where the protoxylem is located towards the periphery and the metaxylem towards the center.
19. Denitrifying bacteria
convert atmospheric N2 to NO3
NO3- to NO2-
Nitrate to atmospheric N2
None
(c) Denitrifying bacteria convert nitrates (NO3-) present in the soil back into atmospheric nitrogen (N2), a process called denitrification.
20. Heliophytes are
Light - loving plants
Shade loving plants
Sun - loving Plants
Water loving plants
(c) Heliophytes are sun-loving plants that are adapted to grow in high light intensity.
21. A plant which has vascular tissue but lacks seed is placed in
. Thallophyte
Bryophyte
Pteridophyte
Gymnosperm
(c) Pteridophytes (ferns and their allies) are vascular plants that reproduce via spores and lack seeds.
22. Parthenogenesis helps to form
Dioecious
Monoecious
Zygospore
Azygospore
(d) Parthenogenesis is a form of asexual reproduction where an egg can develop into an embryo without being fertilized by a sperm. The resulting offspring is called an azygospore in some organisms, but more commonly refers to a parthenote.
23. Mechanical dispersion of seed takes place in
Cucumber
Apple
Wheat
Orange
(a) In cucumber, as the fruit dries, it may burst open, leading to the mechanical dispersion of its seeds.
24. Lawn grass are cut at the top because:
Cells degenerate & rapid regeneration occurs
Lateral growth occurs
It is done for aesthetic purpose
It provides more sun light
(b) Cutting the top of lawn grass encourages lateral growth, resulting in a denser and more even lawn.
25. Stele in fern is:
Protostele
Siphonostele
Voleastele
Dictyostele
(d) The stele (vascular cylinder) in most ferns is a dictyostele, which is a type of siphonostele where the vascular cylinder is broken up into a network of strands.
27. The changing of gas to liquid under high pressure is called:
liquefication
vaporization
refrigeration
evaporation
(a) The process of converting a gas into a liquid by applying high pressure (and usually lowering the temperature) is called liquefaction.
28. For minimum deviation inside the prism, the angle of emergence should be equal to
angle of prism
angle of incidence
angle of refraction
Angle of deviation
(b) For minimum deviation in a prism, the angle of incidence is equal to the angle of emergence.
29. The magnetic material which remaining perpendicular to the non-uniform magnetic field is
Diamagnetic
Paramagnetic
Ferromagnetic
Non-magnetism
(a) Diamagnetic materials, when placed in a non-uniform magnetic field, tend to align themselves perpendicular to the direction of the field in the weaker part of the field.
30. When a woolen sweater worm over a nylon shirt is removed, sparking is observed due to
Static electricity
Current electricity
None
Both
(a) The sparking observed when removing a woolen sweater over a nylon shirt is due to the discharge of static electricity accumulated through friction between the two materials.
31. Gas which does not liquefy at room temperature by applying large pressure is
Carbon dioxide
Ammonia
Sulphur dioxide
Oxygen
(d) Gases with very low critical temperatures, like oxygen, cannot be liquefied at room temperature by applying pressure alone.
32. A hollow sphere of charge does not produce any electric field at any
Inner point
outer point
surface point
none of the above
(a) According to Gauss's law, a hollow sphere of charge produces zero electric field at any point inside the sphere.
33. The temperature at which the water vapour is the atmosphere is saturated is called
Critical temperature
. Dew point
. Both
None
(b) The dew point is the temperature at which the air becomes saturated with water vapor, and condensation begins to form dew.
34. A person suffering from 'myopia' is suggested to wear…..lens
Concave
Convex
Plano convex
None
(a) Myopia (nearsightedness) is corrected using concave (diverging) lenses to focus light properly on the retina.
35. Which of the following indicate same ray
x-ray and α - ray
x-ray and β-ray
x-ray and γ-ray
α- ray & β- ray
(c) X-rays and gamma-rays (γ-rays) are both forms of electromagnetic radiation, differing mainly in their origin.
36. A bulb with 220 volt consume the power of 66 watt. If it will be connected with 160 volt then the power consumed by the bulb will be
. 10 W
40 W
60 W
35 W
(d) Resistance of the bulb R = V2/P = (220)2/66 = 48400/66 ≈ 733.33 ohms. Power consumed at 160 V, P' = V'2/R = (160)2/733.33 = 25600/733.33 ≈ 34.91 W. The closest option is 35 W.
37. Emission of electron by the action of light is known as:
Thermoionic effect
Photoelectric effect
electron emission
thermal emission
(b) The emission of electrons from a material when light shines on it is known as the photoelectric effect.
38. The ray used in radiotherapy is
α-ray
β-ray
X-ray
γ-ray
(d) Gamma rays (γ-rays) are a form of electromagnetic radiation used in radiotherapy to treat cancer.
39. Kjeldahl is method is applicable to estimate:
H_2
O_2
N_2
He
(c) The Kjeldahl method is a quantitative chemical analysis technique used to determine the amount of nitrogen in organic and inorganic substances.
40. Industrial refrigerant freon consists of
CCl2F2
CHCIF2
CHF3
CHCI3
(a) Freon, commonly Freon-12, has the chemical formula CCl2F2 (dichlorodifluoromethane) and is used as a refrigerant.
41. Optical isomerism occurs when
4 different atoms or groups are attached to 4 different C atoms
4 different atoms or groups are attached to 4 same C atoms
4 same atoms or groups are attached to 4 different C atoms
none
(a) Optical isomerism occurs when a carbon atom is bonded to four different atoms or groups (a chiral center).
42. Water has PH 7. A salt is added to it even though the PH of solution remains same. The salt is made up of
strong acid + strong base
strong acid + weak base
strong base + weak acid
weak acid + weak base
(a) A salt formed from a strong acid and a strong base undergoes complete neutralization and does not hydrolyze in water, resulting in a neutral solution with a pH of 7.
43. Slaked lime is:
Ca(OH)2
CaO
. CaCO3
none
(a) Slaked lime is calcium hydroxide, with the chemical formula Ca(OH)2.
44. H. Rectified alcohol is converted to absolute alcohol by the addition of
ZnCl2
Benzene
Dibenzene
H_2 SO_4
(b) Rectified spirit (ethanol with 95.6% by volume) can be converted to absolute alcohol (100% ethanol) by distillation with benzene to remove the remaining water.
45. Dolomite is the ..... form of magnesium
carbonate
sulphate
oxide
Carbide
(a) Dolomite is a mineral composed of calcium magnesium carbonate, with the chemical formula CaMg(CO3)2, making it a carbonate form of magnesium.
46. Which of the following is the strongest acid ?
HF
HCI
HBr
HI
(d) Among the hydrohalic acids, HI (hydroiodic acid) is the strongest acid due to the low bond dissociation energy of the H-I bond.
47. 10 cc of N/2 Hydrochloric acid, 30 cc of N/10 Nitric acid, and 60 cc of N/5 Sulphuric acid are mixed together. What is the normality of the mixture ?
N/5
N/10
N/2
N/20
(a) Total equivalents = (10 * 1/2)/1000 + (30 * 1/10)/1000 + (60 * 1/5)/1000 = 5/1000 + 3/1000 + 12/1000 = 20/1000. Total volume = 10 + 30 + 60 = 100 cc = 100/1000 L. Normality = Total equivalents / Total volume = (20/1000) / (100/1000) = 20/100 = 1/5 N or N/5.
48. Amino acids usually exist in the form of zwitter ions. This means that, they consist of:
The basic NH2 group and acidic COOH group
The basic NH3 group and the acidic COO group
The basic COO- group and the acidic NH3 group
The positive ammonium [NH4+] group and the negative chloride [CI-]group.
(b) Zwitterions are dipolar ions where the amino acid exists with a positively charged amino group (-NH3+) and a negatively charged carboxyl group (-COO-).
49. Chromatography, a method for the separation of mixture and purification of compound, is based on:
absorption
solubility
colour change
selective adsorption
(d) Chromatography is a separation technique based on the selective adsorption of components of a mixture on a stationary phase, with a mobile phase carrying the mixture through it.
50. Fermentation is a:
reversible process
exothermic process
endothermic process
poikilothermic process
(b) Fermentation is typically an exothermic process, releasing energy in the form of heat as microorganisms break down organic substances.
