CUET 2026 Biology MCQs for Practice

Biology MCQ Question Answers for CUET 2026

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 2026 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. Lateral line system found in fishes has been lost in Amphibia because of

a.development of sturdy eggs

b.change over to herbivorous feeding

c.occurrence of metamoophosis on amphibian

d.evolution of terrestrial habit

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

a.phylloclade

b.phyllode

c.none of these

d.cladode

3. The function of cristae in a mitochondrion is

a.carbon assimilation

b.elimination of Carbon Dioxide

c.electron transport and ATP synthesis

d.intake of Oxygen

4. The leaf lamina are generally reduced in

a.hydrophytes

b.epiphytes

c.mesophytes

d.xerophytes

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

a.platyhelminthes

b.coelenterate

c.porifera

d.protozoa

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

a.gestation

b.menopause

c.menstruation

d.puberty

7. 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

8. Among the following which is a test cross?

a.TT x Tt

b.Tt x tt

c.Tt x Tt

d.TT x TT

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

a.fruit eaters

b.omnivores

c.herbivores

d.carnivores

10. Viruses were discovered by

a.Stanley

b.Herelle

c.Iwanowiski

d.Twort

11. Which disease is caused by a nematode?

a.Amoebiasis

b.Poliomyelitis

c.Leprosy

d.Filariasis

12. Sponges belong to the phylum

a.sporozoa

b.porifera

c.coelenterate

d.mastigophora

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

a.didelphis

b.diapedesis

c.diakinesis

d.diapause

14. Which mosquito sits making an acute angle?

a.Aedes

b.Anopheles

c.Culex

d.Psorophora

15. The locomotion of snake is helped by

a.ribs only

b.reduced limbs

c.reduced ribs

d.ribs and reduced limbs

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

a.eohippus

b.miobibbus

c.merychippus

d.pliohippus

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

a.short but broad abdomen and presence of anal styles

b.Short but broad abdomen and absence of anal styles

c.short cut broad abdomen and anal cerci

d.long but broad abdomen and anal cerci

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

a.Meiosis

b.Mitosis

c.None of these

d.Apomixis

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

a.10 litres

b.15 litres

c.5 litres

d.2 litres

20. Which one of these is a cancerous disease

a.Kwashiorkor

b.Malaria

c.Leukaemia

d.Angina

21. Sea hare is the common name of

a.Sepia

b.Aplysia

c.Doris

d.Octopus

22. In human body, the number of bones is

a.206

b.106

c.306

d.406

23. Fat soluble vitamins are

a.A, B and C

b.A, D and E

c.B, C and D

d.E, D and B

24. The smallest cranial nerve is

a.olfactory

b.abducens

c.optic

d.auditory

25. Algae and fungi are characterised by the possession of

a.multicellular jacketed sex organs

b.chloroplasts

c.embryo

d.unicellular jacketed sex organs

26. Alternation of generations is otherwise known as

a.Epigenesis

b.Biogenesis

c.Metagenesis

d.Dimorphism

27. Sexual reproduction or two fusing gametes of Spirogyra are

a.morphologically similar

b.morphologically and physiologically dissimilar

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

d.morophologically dissimilar

28. Gametophytic generation is dominant in

a.Gymnosperms

b.Bryophytes

c.Pteridophytes

d.Angiosperms

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

a.18

b.16

c.48

d.24

30. The 13-celled male gametophyte of Selaginella has

a.12 cells of antheridium + 1 prothallial

b.10 cells of antheridium + 3 prothallial cells

c.8 cells of antheridium + 5 prothallial cells

d.9 cells of antheridium + 4 prothallial

31. Trophozoites of E.histolytica reproduced by

a.budding

b.autogamy

c.conjugation

d.binary fission

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

a.lack of sufficient amount of haemoglobin

b.arterial hypoxia

c.anaemic hypoxia

d.lack of sufficient amount of erythrocytes

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

a.mouth

b.alimentary canal

c.a gastro vascular cavity

d.body cavity

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

a.Small pox

b.Rabies

c.Influenza

d.Whooping cough

35. Colour is perceived by

a.rods in retina

b.cones in retina

c.cornea-lens complex

d.lense only

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

a.anterior fins

b.paired fins

c.ray fins

d.pectoral fins

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

a.annelids

b.coelenterates

c.sponges

d.arthropods

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

a.mutualism

b.parasitism

c.commensalism

d.cooperation

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

a.paedogenes

b.cryptorchidism

c.castration

d.impotency

40. A motor nerve carries impulses from

a.effectors to central nervous system

b.central nervous system to the effector

c.from cranial nerves to the effectors

d.effectors to cranial nerves

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

a.dermis

b.cornified cells

c.stratum germinativum

d.epidermis

42. The study of migration of birds is called

a.Nidology

b.Phenology

c.Ornithology

d.Ecology

43. Study of soil is called:

a.Pedology

b.Pathology

c.Ecology

d.Nematology

44. Penicillium is a member of:

a.Phycomycetes

b.Ascomyectes

c.Deuteromycetes

d.Basidiomycetes

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

a.urea and uric acid respectively

b.uric acid

c.urea

d.uric acid and urea

46. Sea cucumber belongs to class

a.Holothuroidea

b.Crinoidea

c.Asteroidea

d.Ophiuroidea

47. Dental formula of adult human being is

a.2,1,2,3/2,1,2,3

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

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

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

48. The sickle cell anaemia results in

a.leukaemia

b.polio

c.polycemia

d.polychthemia

49. Which of these lives in water permanently?

a.Salamander

b.Frogs

c.Necturus

d.Ichthyophis

50. Bryophyta acts as a connecting link between

a.terrestrial fungi and aquatic fungi

b.algae and fungi

c.thallophyta and pteridophyta

d.pteridophyta and gymnosperms

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

a.sperm lysins released from the acrosome

b.acrosome

c.mitochondria located at the middle piece

d.flagellum

52. 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.GUA AUC GUA GUA CUG

b.TAG ATG ATG GUA CUG

c.GTA ATC GAT GTA CTA

d.GTA ATG GTA GAT CTA

53. The deficiency of magnesium results in

a.interveinal chlorosis

b.none of these

c.wilting of plants

d.leaf chlorosis

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

a.none of these

b.biogeographic evidence for evolution

c.homological evidence for evolution

d.palaentological evidence for evolution

55. Ostia are meant to

a.admit water current

b.excrete waste products

c.ingest food

d.pass out water current

56. Germ theory of disease was proposed by

a.T. Boveri

b.L. Pasteur

c.F. Jacob

d.Robert Koch

57. Pharyngeal gill slits are found in

a.cuttle fish

b.star fish

c.shark

d.cray fish

58. Which of the following statements is correct?

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

b.Blood pigment of earthworm is haemocyanin

c.Blood of earthworm is blue in colour

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

59. Anticoagulant secreted by leech is

a.Haemozoin

b.Hirudin

c.Haematin

d.Heparin

60. Which is the correct food chain?

a.grass → insect → bird → snake

b.grass → snake → inset → deer

c.grass → wolf → deer → buffalo

d.bacteria → grass → rabbit → wolf

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

a.Rhizobium

b.None of these

c.Bacillus subtilis

d.E. coli

62. Phyllotaxy is the arrangement of

a.branches

b.leaves

c.flower buds

d.veins

63. The best indicator of SO2 pollution is

a.Algae

b.Ferns

c.Lichens

d.Fungus

64. Red rust of tea is caused by

a.Oedogonium

b.Puccinia

c.Pteris

d.Cephaleuros

65. In rabbit, the danger signal is given by

a.sound

b.tail

c.fore limbs

d.external ear

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

a.parturition

b.ovuation

c.gestation

d.placentation

67. Sebaceous glands are found in

a.epithelium of stomach of frog

b.dermis of skin of mammals

c.epidermis of skin of mammals

d.epithelium of intestine of frog

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

a.4,000 kcal/day

b.1,600 kcal/day

c.3,200 kcal/day

d.2,600 kcal/day

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

a.malleus, incus, stapes

b.incus, stapes, malleus

c.malleus, stapes, incus

d.stapes, incus, malleus

70. Islets of Langerhans secrete

a.enzymes

b.insulin

c.none of these

d.glucagons

71. The respiratory organs in a freshwater mussel are

a.pulmonary sacs

b.respiratory siphons

c.book lungs

d.gills

72. Colour blidness is caused due to

a.sex-linked abnormality

b.absence of rods in retina

c.deficiency of vitamin C

d.absence of visual purple in retina

73. Androgens are secreted from

a.Testis and adrenal cortex

b.Leydig cels and adrenal cortex

c.Adenohypophysis and tesis

d.Leydig cells and placenta

74. A posterior pituitary hormone released during parturition is

a.Vasopressin

b.Oxytocin

c.ACTH

d.ICSH

75. The locomotor organs of Echinoderms is called

a.setae

b.parapodia

c.tube feet

d.pseudopodia

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

a.bracts

b.hooks

c.pappus

d.corolla

77. Syngamy means

a.fusion of cytoplasm

b.fusion of dissimilar spores

c.fusion of gametes

d.fusion of similar spores

78. A mammals which never drinks water is

a.kangaroo rat

b.kangaroo

c.spiny ant eater

d.shrew

79. Commercial source of citric acid is:

a.Penicillium

b.Aspergillus

c.Yeast

d.Citrus fruit

80. Which of the following is commercially most valuable:

a.Heartwood

b.Spring wood

c.Autumnwood

d.Sapwood

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

a.A pair of ovaries and oviducts

b.Cloaca

c.A pair of testes

d.A pair of large kidneys

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

a.trophic levels

b.organisms

c.biotic communities

d.biomass

83. Kala-azar is a disease caused by

a.Taenia solium transmitted by infected pork

b.Leishmania donovani transmitted by sandfly

c.Wuchereria bancrofti transmitted by Culex

d.Trypanosma gambiense transmitted by Tsetse fly

84. Multiflagellate sperms are the characteristic of

a.Riccia

b.Ferns

c.Pogonatum

d.Mosses

85. Typically all mammals have seven vertebrae except

a.man

b.sea cow

c.elephant

d.giraffe

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

a.class

b.order

c.family

d.species

87. Nematocysts of Hydra are important for

a.cataching prey

b.testing the food

c.testing the water

d.paralysing prey

88. Adams apple in man is

a.cartilages of the trachea

b.thyroid cartilage of larynx

c.epiglottis

d.cartilage of hyoid apparatus

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

a.Haemophilia

b.Haemolysis

c.Haemopoiesis

d.Haemaglutination

90. Groundnut is

a.Psidium guajava

b.Oryza sativa

c.Cannabis sativa

d.Arachis hypogaea

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

a.formation of root primordia

b.formation of buds

c.germination of seed

d.formation of pollen grains

92. Oil in the skin is secreted by

a.sebaceous glands

b.sweat glands

c.hair follicles

d.mucous glands

93. What is monothecous stamen?

a.It is a sterile stamen

b.It is a stamen with one lobe

c.It is a stamen with many lobes

d.It is a stamen with no lobes

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

a.Balanoglossus

b.Peripatus

c.Limulus

d.Sphenodon

95. The protein deficiency disease is known as

a.eczema

b.kwashiorkor

c.scurvy

d.mycoses

96. Female cone is absent in

a.Taxus

b.None of these

c.Pinus

d.Cycas

97. Chlorophyll contains

a.Fe

b.Mg

c.K

d.Mn

98. Malpighian bodies are found in

a.insects and involved in excretion

b.kidney of vertebrates and is involved in ultrafiltration

c.kidney of vertebrates and is involved in selective reabsorption

d.kidney of vertebrates and is involved in passive filtration

99. The largest ovule in plant kingdom is seen is

a.Cycas circinalis

b.None of these

c.Both A and B

d.Cycas revolute

100. Infection of Ascaris usually occurs by

a.tse tse fly

b.contaminated water and vegetables

c.imperfectly cooked pork

d.mosquito bite

CUET 2026 Biology MCQ Question Answers – Practice MCQ Questions on Biology

Biology MCQ Question Answers for CUET 2026

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