CUET 2025 Biology MCQs for Practice

Biology MCQ Question Answers for CUET 2025

Biology MCQs – Practice the Biology MCQs suitable for various Entrance Exams including CUET. Learn and practice Biology questions and answers. Biology MCQ questions are very helpful for various competitive exams. CUET is a Common University Entrance Test that is now mandatory to take admission to Central Universities in India. Biology MCQ questions are based on the latest CUET 2025 exam pattern and other entrance exams, so that you can have a fair idea about exam trends that will be followed for various entrance exams.

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1. A womans fertility ceases at about 49-55 years. This is known as

a.menopause

b.gestation

c.menstruation

d.puberty

2. A method of cell division which is characterized by the exact chromosome duplication is:

a.Mitosis

b.None of these

c.Apomixis

d.Meiosis

3. Bryophyta acts as a connecting link between

a.terrestrial fungi and aquatic fungi

b.thallophyta and pteridophyta

c.algae and fungi

d.pteridophyta and gymnosperms

4. Penicillium is a member of:

a.Deuteromycetes

b.Phycomycetes

c.Basidiomycetes

d.Ascomyectes

5. Algae and fungi are characterised by the possession of

a.embryo

b.multicellular jacketed sex organs

c.unicellular jacketed sex organs

d.chloroplasts

6. Gametophytic generation is dominant in

a.Pteridophytes

b.Bryophytes

c.Angiosperms

d.Gymnosperms

7. The smallest cranial nerve is

a.auditory

b.optic

c.abducens

d.olfactory

8. Red rust of tea is caused by

a.Cephaleuros

b.Pteris

c.Oedogonium

d.Puccinia

9. Adams apple in man is

a.thyroid cartilage of larynx

b.cartilages of the trachea

c.cartilage of hyoid apparatus

d.epiglottis

10. One of the following is considered as a living and connecting link between Annelida and Arthropoda:

a.Balanoglossus

b.Peripatus

c.Sphenodon

d.Limulus

11. Worms of Phylum Platyhelminthes are triploblastic, but do not possess

a.body cavity

b.mouth

c.alimentary canal

d.a gastro vascular cavity

12. The food-chain of an ecosystem can be represented as a pyramid divided into four or more

a.organisms

b.biomass

c.biotic communities

d.trophic levels

13. Kala-azar is a disease caused by

a.Wuchereria bancrofti transmitted by Culex

b.Taenia solium transmitted by infected pork

c.Trypanosma gambiense transmitted by Tsetse fly

d.Leishmania donovani transmitted by sandfly

14. Typically all mammals have seven vertebrae except

a.giraffe

b.elephant

c.sea cow

d.man

15. Commercial source of citric acid is:

a.Aspergillus

b.Yeast

c.Penicillium

d.Citrus fruit

16. Among the following which is a test cross?

a.Tt x tt

b.TT x TT

c.TT x Tt

d.Tt x Tt

17. In flowering plants, meiosis occurs at the time of

a.formation of buds

b.germination of seed

c.formation of pollen grains

d.formation of root primordia

18. Chlorophyll contains

a.K

b.Fe

c.Mg

d.Mn

19. Failure of descending testis into the scrotum is known as

a.paedogenes

b.castration

c.impotency

d.cryptorchidism

20. Colour is perceived by

a.cornea-lens complex

b.cones in retina

c.rods in retina

d.lense only

21. Androgens are secreted from

a.Leydig cells and placenta

b.Leydig cels and adrenal cortex

c.Adenohypophysis and tesis

d.Testis and adrenal cortex

22. The leaf lamina are generally reduced in

a.xerophytes

b.hydrophytes

c.mesophytes

d.epiphytes

23. Alternation of generations is otherwise known as

a.Epigenesis

b.Dimorphism

c.Metagenesis

d.Biogenesis

24. Moulting or shedding of skin in snakes is done by

a.cornified cells

b.dermis

c.stratum germinativum

d.epidermis

25. The basic taxonomic unit upon which the systems of classification are constructed is

a.order

b.family

c.species

d.class

26. The best indicator of SO2 pollution is

a.Algae

b.Fungus

c.Ferns

d.Lichens

27. Multiflagellate sperms are the characteristic of

a.Ferns

b.Pogonatum

c.Mosses

d.Riccia

28. In rabbit, the danger signal is given by

a.external ear

b.fore limbs

c.sound

d.tail

29. The deficiency of magnesium results in

a.interveinal chlorosis

b.leaf chlorosis

c.wilting of plants

d.none of these

30. The first invertebrates to develop a true nervous system are

a.coelenterates

b.annelids

c.sponges

d.arthropods

31. Sea hare is the common name of

a.Aplysia

b.Octopus

c.Sepia

d.Doris

32. During fertilization the spermatozoa penetrate through the egg membranes with the help of

a.flagellum

b.acrosome

c.mitochondria located at the middle piece

d.sperm lysins released from the acrosome

33. If the main stem becomes fleshy and photosynthetic, it is called

a.phyllode

b.phylloclade

c.none of these

d.cladode

34. Anticoagulant secreted by leech is

a.Hirudin

b.Heparin

c.Haematin

d.Haemozoin

35. Fat soluble vitamins are

a.A, D and E

b.A, B and C

c.E, D and B

d.B, C and D

36. In human body, the number of bones is

a.106

b.406

c.306

d.206

37. The study of migration of birds is called

a.Nidology

b.Phenology

c.Ornithology

d.Ecology

38. A mammals which never drinks water is

a.kangaroo rat

b.spiny ant eater

c.kangaroo

d.shrew

39. Lateral line system found in fishes has been lost in Amphibia because of

a.development of sturdy eggs

b.occurrence of metamoophosis on amphibian

c.evolution of terrestrial habit

d.change over to herbivorous feeding

40. Colouration of frog is due to

a.presence of melanophores

b.inidescence of skin

c.growth of algal colonies of skin

d.presence of special chromatophores below the epidermal cells

41. Presence of a vestigial appendix in man suggests that our forebears were

a.omnivores

b.herbivores

c.carnivores

d.fruit eaters

42. Which disease is caused by a nematode?

a.Filariasis

b.Leprosy

c.Amoebiasis

d.Poliomyelitis

43. Parachute mechanism of fruit and seed dispersal is due to structure called

a.pappus

b.bracts

c.corolla

d.hooks

44. The function of cristae in a mitochondrion is

a.electron transport and ATP synthesis

b.intake of Oxygen

c.carbon assimilation

d.elimination of Carbon Dioxide

45. Sebaceous glands are found in

a.epithelium of intestine of frog

b.epithelium of stomach of frog

c.epidermis of skin of mammals

d.dermis of skin of mammals

46. Which mosquito sits making an acute angle?

a.Anopheles

b.Culex

c.Aedes

d.Psorophora

47. Sponges belong to the phylum

a.coelenterate

b.mastigophora

c.sporozoa

d.porifera

48. The endosperm cell of an angiosperm has 24 chromosomes, the number of chromosomes in its megaspore, shall be

a.24

b.48

c.16

d.18

49. Sexual reproduction or two fusing gametes of Spirogyra are

a.morophologically dissimilar

b.morphologically similar

c.morphologically and physiologically dissimilar

d.morphologically similar (isogamous) and physiologically dissimilar (anisogamous)

50. Which of these lives in water permanently?

a.Salamander

b.Necturus

c.Ichthyophis

d.Frogs

51. Colour blidness is caused due to

a.absence of visual purple in retina

b.absence of rods in retina

c.deficiency of vitamin C

d.sex-linked abnormality

52. Islets of Langerhans secrete

a.glucagons

b.none of these

c.enzymes

d.insulin

53. Which one of these is a cancerous disease

a.Angina

b.Kwashiorkor

c.Leukaemia

d.Malaria

54. What amount of blood is ejected by ventricle per minute?

a.10 litres

b.15 litres

c.5 litres

d.2 litres

55. The mountain sickness in persons climbing to high attitudes without the aid of oxygen cylinders is due to

a.anaemic hypoxia

b.arterial hypoxia

c.lack of sufficient amount of haemoglobin

d.lack of sufficient amount of erythrocytes

56. Viruses were discovered by

a.Stanley

b.Iwanowiski

c.Twort

d.Herelle

57. Flame cells are the excretory organs of animals belonging the phylum

a.porifera

b.platyhelminthes

c.coelenterate

d.protozoa

58. Syngamy means

a.fusion of gametes

b.fusion of similar spores

c.fusion of cytoplasm

d.fusion of dissimilar spores

59. Nematocysts of Hydra are important for

a.testing the water

b.testing the food

c.paralysing prey

d.cataching prey

60. Malpighian bodies are found in

a.kidney of vertebrates and is involved in passive filtration

b.insects and involved in excretion

c.kidney of vertebrates and is involved in selective reabsorption

d.kidney of vertebrates and is involved in ultrafiltration

61. Which is the correct food chain?

a.grass → snake → inset → deer

b.grass → insect → bird → snake

c.grass → wolf → deer → buffalo

d.bacteria → grass → rabbit → wolf

62. Birds and reptiles excrete their nitrogenous waste in the form of

a.urea and uric acid respectively

b.uric acid and urea

c.uric acid

d.urea

63. Which of the following statements is correct?

a.Blood of earthworm is red and haemoglobin is dissolved in RBC

b.Blood pigment of earthworm is haemocyanin

c.Blood pigment of earthworm is red and haemoglobin is dissolved in plasma

d.Blood of earthworm is blue in colour

64. What is monothecous stamen?

a.It is a sterile stamen

b.It is a stamen with many lobes

c.It is a stamen with one lobe

d.It is a stamen with no lobes

65. Which is lacking in the urogenital system of birds?

a.Cloaca

b.A pair of testes

c.A pair of large kidneys

d.A pair of ovaries and oviducts

66. Ostia are meant to

a.admit water current

b.pass out water current

c.ingest food

d.excrete waste products

67. The average metabolic rate of a male individual in terms of heart output/day is

a.1,600 kcal/day

b.3,200 kcal/day

c.4,000 kcal/day

d.2,600 kcal/day

68. Infection of Ascaris usually occurs by

a.tse tse fly

b.mosquito bite

c.imperfectly cooked pork

d.contaminated water and vegetables

69. Which of the following is not a viral disease of man?

a.Rabies

b.Small pox

c.Influenza

d.Whooping cough

70. The female cockroach can be distinguished from the male by

a.short cut broad abdomen and anal cerci

b.Short but broad abdomen and absence of anal styles

c.long but broad abdomen and anal cerci

d.short but broad abdomen and presence of anal styles

71. Pharyngeal gill slits are found in

a.star fish

b.cuttle fish

c.shark

d.cray fish

72. A motor nerve carries impulses from

a.central nervous system to the effector

b.from cranial nerves to the effectors

c.effectors to cranial nerves

d.effectors to central nervous system

73. Study of soil is called:

a.Pathology

b.Pedology

c.Ecology

d.Nematology

74. The expulsion of completely developed foetus from the uterus is known as

a.gestation

b.placentation

c.ovuation

d.parturition

75. Sea cucumber belongs to class

a.Asteroidea

b.Crinoidea

c.Holothuroidea

d.Ophiuroidea

76. Citrus canker is a common disease of lemon and oranges. It is caused by

a.Rhizobium

b.None of these

c.E. coli

d.Bacillus subtilis

77. Germ theory of disease was proposed by

a.T. Boveri

b.Robert Koch

c.L. Pasteur

d.F. Jacob

78. A sucker fish (Remora) attached to the body of shark would exemplify

a.commensalism

b.parasitism

c.cooperation

d.mutualism

79. The sequence of ear ossicles starting from the eardrum is

a.malleus, stapes, incus

b.malleus, incus, stapes

c.stapes, incus, malleus

d.incus, stapes, malleus

80. Groundnut is

a.Cannabis sativa

b.Oryza sativa

c.Arachis hypogaea

d.Psidium guajava

81. The sickle cell anaemia results in

a.polychthemia

b.leukaemia

c.polio

d.polycemia

82. Sequence of nucleotides in a DNA strand is CAT TAG CAT CAT GAC, what will be the base sequence in complementary strand of RNA?

a.GTA ATC GAT GTA CTA

b.GUA AUC GUA GUA CUG

c.TAG ATG ATG GUA CUG

d.GTA ATG GTA GAT CTA

83. Trophozoites of E.histolytica reproduced by

a.budding

b.autogamy

c.conjugation

d.binary fission

84. The protein deficiency disease is known as

a.kwashiorkor

b.eczema

c.mycoses

d.scurvy

85. Female cone is absent in

a.None of these

b.Cycas

c.Taxus

d.Pinus

86. The earliest ancestor of horse from early Eocene period is

a.merychippus

b.miobibbus

c.eohippus

d.pliohippus

87. Phyllotaxy is the arrangement of

a.branches

b.flower buds

c.leaves

d.veins

88. The process of formation of blood corpuscles is known as

a.Haemolysis

b.Haemophilia

c.Haemaglutination

d.Haemopoiesis

89. Which of the following is commercially most valuable:

a.Sapwood

b.Autumnwood

c.Spring wood

d.Heartwood

90. The locomotor organs of Echinoderms is called

a.parapodia

b.pseudopodia

c.setae

d.tube feet

91. The 13-celled male gametophyte of Selaginella has

a.10 cells of antheridium + 3 prothallial cells

b.8 cells of antheridium + 5 prothallial cells

c.9 cells of antheridium + 4 prothallial

d.12 cells of antheridium + 1 prothallial

92. The largest ovule in plant kingdom is seen is

a.None of these

b.Cycas circinalis

c.Both A and B

d.Cycas revolute

93. A posterior pituitary hormone released during parturition is

a.Vasopressin

b.Oxytocin

c.ICSH

d.ACTH

94. The respiratory organs in a freshwater mussel are

a.book lungs

b.respiratory siphons

c.pulmonary sacs

d.gills

95. Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents is known as

a.didelphis

b.diapause

c.diakinesis

d.diapedesis

96. Oil in the skin is secreted by

a.mucous glands

b.sweat glands

c.hair follicles

d.sebaceous glands

97. The locomotion of snake is helped by

a.ribs only

b.reduced ribs

c.ribs and reduced limbs

d.reduced limbs

98. Dental formula of adult human being is

a.2,1,2,2/2,1,2,2

b.2,1,2,3/2,1,2,3

c.2,1,3,3/2,1,3,3

d.2,1,3,2/2,1,3,2

99. The pair of fins found near the operculum in bony fishes is known as

a.paired fins

b.anterior fins

c.ray fins

d.pectoral fins

100. The resemblance between the south American llama and the African camel indicates a common ancestry. This is

a.biogeographic evidence for evolution

b.palaentological evidence for evolution

c.homological evidence for evolution

d.none of these

CUET 2025 Biology MCQ Question Answers – Practice MCQ Questions on Biology

Biology MCQ Question Answers for CUET 2025

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