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. Typically all mammals have seven vertebrae except

a.giraffe

b.sea cow

c.elephant

d.man

2. Syngamy means

a.fusion of similar spores

b.fusion of cytoplasm

c.fusion of gametes

d.fusion of dissimilar spores

3. Bryophyta acts as a connecting link between

a.algae and fungi

b.pteridophyta and gymnosperms

c.thallophyta and pteridophyta

d.terrestrial fungi and aquatic fungi

4. The 13-celled male gametophyte of Selaginella has

a.12 cells of antheridium + 1 prothallial

b.8 cells of antheridium + 5 prothallial cells

c.10 cells of antheridium + 3 prothallial cells

d.9 cells of antheridium + 4 prothallial

5. Groundnut is

a.Arachis hypogaea

b.Oryza sativa

c.Cannabis sativa

d.Psidium guajava

6. Which mosquito sits making an acute angle?

a.Aedes

b.Psorophora

c.Anopheles

d.Culex

7. Which disease is caused by a nematode?

a.Poliomyelitis

b.Filariasis

c.Amoebiasis

d.Leprosy

8. Algae and fungi are characterised by the possession of

a.unicellular jacketed sex organs

b.chloroplasts

c.embryo

d.multicellular jacketed sex organs

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

a.Meiosis

b.Apomixis

c.None of these

d.Mitosis

10. The locomotion of snake is helped by

a.ribs and reduced limbs

b.reduced ribs

c.reduced limbs

d.ribs only

11. The function of cristae in a mitochondrion is

a.carbon assimilation

b.intake of Oxygen

c.electron transport and ATP synthesis

d.elimination of Carbon Dioxide

12. The locomotor organs of Echinoderms is called

a.pseudopodia

b.setae

c.parapodia

d.tube feet

13. 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

14. Red rust of tea is caused by

a.Pteris

b.Cephaleuros

c.Oedogonium

d.Puccinia

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

a.parasitism

b.mutualism

c.cooperation

d.commensalism

16. Sexual reproduction or two fusing gametes of Spirogyra are

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

b.morophologically dissimilar

c.morphologically similar

d.morphologically and physiologically dissimilar

17. The largest ovule in plant kingdom is seen is

a.Cycas revolute

b.Cycas circinalis

c.None of these

d.Both A and B

18. Sea hare is the common name of

a.Sepia

b.Doris

c.Octopus

d.Aplysia

19. Commercial source of citric acid is:

a.Aspergillus

b.Citrus fruit

c.Yeast

d.Penicillium

20. Malpighian bodies are found in

a.kidney of vertebrates and is involved in selective reabsorption

b.kidney of vertebrates and is involved in passive filtration

c.insects and involved in excretion

d.kidney of vertebrates and is involved in ultrafiltration

21. Sponges belong to the phylum

a.porifera

b.sporozoa

c.coelenterate

d.mastigophora

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

a.anaemic hypoxia

b.lack of sufficient amount of erythrocytes

c.lack of sufficient amount of haemoglobin

d.arterial hypoxia

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

a.coelenterate

b.platyhelminthes

c.porifera

d.protozoa

24. Sebaceous glands are found in

a.epidermis of skin of mammals

b.epithelium of stomach of frog

c.dermis of skin of mammals

d.epithelium of intestine of frog

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

a.15 litres

b.10 litres

c.2 litres

d.5 litres

26. The sickle cell anaemia results in

a.polychthemia

b.leukaemia

c.polycemia

d.polio

27. The protein deficiency disease is known as

a.kwashiorkor

b.mycoses

c.scurvy

d.eczema

28. Germ theory of disease was proposed by

a.F. Jacob

b.T. Boveri

c.L. Pasteur

d.Robert Koch

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

a.diapause

b.diapedesis

c.didelphis

d.diakinesis

30. In human body, the number of bones is

a.306

b.206

c.106

d.406

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

a.order

b.class

c.species

d.family

32. The deficiency of magnesium results in

a.interveinal chlorosis

b.wilting of plants

c.leaf chlorosis

d.none of these

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

a.herbivores

b.carnivores

c.fruit eaters

d.omnivores

34. Infection of Ascaris usually occurs by

a.contaminated water and vegetables

b.tse tse fly

c.imperfectly cooked pork

d.mosquito bite

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

a.Cloaca

b.A pair of large kidneys

c.A pair of testes

d.A pair of ovaries and oviducts

36. Alternation of generations is otherwise known as

a.Dimorphism

b.Metagenesis

c.Epigenesis

d.Biogenesis

37. Which of these lives in water permanently?

a.Salamander

b.Frogs

c.Necturus

d.Ichthyophis

38. Phyllotaxy is the arrangement of

a.flower buds

b.leaves

c.veins

d.branches

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

a.formation of pollen grains

b.germination of seed

c.formation of root primordia

d.formation of buds

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

a.urea and uric acid respectively

b.urea

c.uric acid

d.uric acid and urea

41. A posterior pituitary hormone released during parturition is

a.Oxytocin

b.ICSH

c.ACTH

d.Vasopressin

42. Adams apple in man is

a.cartilages of the trachea

b.thyroid cartilage of larynx

c.epiglottis

d.cartilage of hyoid apparatus

43. Which one of these is a cancerous disease

a.Angina

b.Kwashiorkor

c.Malaria

d.Leukaemia

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

a.none of these

b.homological evidence for evolution

c.biogeographic evidence for evolution

d.palaentological evidence for evolution

45. Which of the following is commercially most valuable:

a.Sapwood

b.Autumnwood

c.Heartwood

d.Spring wood

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

a.none of these

b.phylloclade

c.cladode

d.phyllode

47. Pharyngeal gill slits are found in

a.cray fish

b.shark

c.cuttle fish

d.star fish

48. Androgens are secreted from

a.Testis and adrenal cortex

b.Adenohypophysis and tesis

c.Leydig cells and placenta

d.Leydig cels and adrenal cortex

49. Colour is perceived by

a.rods in retina

b.cones in retina

c.lense only

d.cornea-lens complex

50. Ostia are meant to

a.pass out water current

b.admit water current

c.ingest food

d.excrete waste products

51. A mammals which never drinks water is

a.spiny ant eater

b.shrew

c.kangaroo rat

d.kangaroo

52. Chlorophyll contains

a.K

b.Mn

c.Mg

d.Fe

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

a.dermis

b.cornified cells

c.epidermis

d.stratum germinativum

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

a.development of sturdy eggs

b.evolution of terrestrial habit

c.change over to herbivorous feeding

d.occurrence of metamoophosis on amphibian

55. What is monothecous stamen?

a.It is a stamen with one lobe

b.It is a stamen with many lobes

c.It is a sterile stamen

d.It is a stamen with no lobes

56. Sea cucumber belongs to class

a.Ophiuroidea

b.Crinoidea

c.Asteroidea

d.Holothuroidea

57. 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 ATG GTA GAT CTA

b.GTA ATC GAT GTA CTA

c.TAG ATG ATG GUA CUG

d.GUA AUC GUA GUA CUG

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

a.2,600 kcal/day

b.1,600 kcal/day

c.3,200 kcal/day

d.4,000 kcal/day

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

a.Small pox

b.Whooping cough

c.Rabies

d.Influenza

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

a.acrosome

b.mitochondria located at the middle piece

c.flagellum

d.sperm lysins released from the acrosome

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

a.Bacillus subtilis

b.E. coli

c.None of these

d.Rhizobium

62. Gametophytic generation is dominant in

a.Bryophytes

b.Angiosperms

c.Gymnosperms

d.Pteridophytes

63. Islets of Langerhans secrete

a.none of these

b.enzymes

c.glucagons

d.insulin

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

a.Balanoglossus

b.Sphenodon

c.Limulus

d.Peripatus

65. Trophozoites of E.histolytica reproduced by

a.budding

b.conjugation

c.autogamy

d.binary fission

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

a.pappus

b.bracts

c.corolla

d.hooks

67. 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 red and haemoglobin is dissolved in plasma

c.Blood of earthworm is blue in colour

d.Blood pigment of earthworm is haemocyanin

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

a.paedogenes

b.impotency

c.castration

d.cryptorchidism

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

a.ray fins

b.anterior fins

c.pectoral fins

d.paired fins

70. Kala-azar is a disease caused by

a.Wuchereria bancrofti transmitted by Culex

b.Trypanosma gambiense transmitted by Tsetse fly

c.Taenia solium transmitted by infected pork

d.Leishmania donovani transmitted by sandfly

71. Colour blidness is caused due to

a.sex-linked abnormality

b.absence of rods in retina

c.absence of visual purple in retina

d.deficiency of vitamin C

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

a.a gastro vascular cavity

b.body cavity

c.alimentary canal

d.mouth

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

a.ovuation

b.gestation

c.parturition

d.placentation

74. 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

75. 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

76. The best indicator of SO2 pollution is

a.Lichens

b.Ferns

c.Algae

d.Fungus

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

a.arthropods

b.annelids

c.coelenterates

d.sponges

78. The study of migration of birds is called

a.Phenology

b.Ecology

c.Ornithology

d.Nidology

79. In rabbit, the danger signal is given by

a.external ear

b.tail

c.sound

d.fore limbs

80. 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

81. The leaf lamina are generally reduced in

a.mesophytes

b.xerophytes

c.hydrophytes

d.epiphytes

82. Oil in the skin is secreted by

a.sweat glands

b.mucous glands

c.hair follicles

d.sebaceous glands

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

a.Haemolysis

b.Haemophilia

c.Haemaglutination

d.Haemopoiesis

84. Penicillium is a member of:

a.Ascomyectes

b.Phycomycetes

c.Basidiomycetes

d.Deuteromycetes

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

a.malleus, incus, stapes

b.stapes, incus, malleus

c.malleus, stapes, incus

d.incus, stapes, malleus

86. A motor nerve carries impulses from

a.effectors to cranial nerves

b.central nervous system to the effector

c.effectors to central nervous system

d.from cranial nerves to the effectors

87. Viruses were discovered by

a.Iwanowiski

b.Herelle

c.Twort

d.Stanley

88. The smallest cranial nerve is

a.olfactory

b.optic

c.abducens

d.auditory

89. Fat soluble vitamins are

a.A, D and E

b.B, C and D

c.E, D and B

d.A, B and C

90. Female cone is absent in

a.Taxus

b.Pinus

c.None of these

d.Cycas

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

a.miobibbus

b.merychippus

c.pliohippus

d.eohippus

92. Among the following which is a test cross?

a.TT x Tt

b.Tt x Tt

c.TT x TT

d.Tt x tt

93. The respiratory organs in a freshwater mussel are

a.book lungs

b.gills

c.pulmonary sacs

d.respiratory siphons

94. Study of soil is called:

a.Ecology

b.Pathology

c.Nematology

d.Pedology

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

a.menstruation

b.menopause

c.puberty

d.gestation

96. Multiflagellate sperms are the characteristic of

a.Ferns

b.Pogonatum

c.Mosses

d.Riccia

97. Anticoagulant secreted by leech is

a.Heparin

b.Haematin

c.Haemozoin

d.Hirudin

98. Nematocysts of Hydra are important for

a.paralysing prey

b.cataching prey

c.testing the food

d.testing the water

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

a.organisms

b.biotic communities

c.trophic levels

d.biomass

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

a.long but broad abdomen and anal cerci

b.Short but broad abdomen and absence of anal styles

c.short cut broad abdomen and anal cerci

d.short but broad abdomen and presence of anal styles

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

Biology MCQ Question Answers for CUET 2026

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