Biology MCQs for Practice

Biology MCQ Question Answers for Various Entrance Exams

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 exam pattern 2022 and other entrance exams, so that you can have a fair idea about exam trends that will be followed for various entrance exams.

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

a.organisms

b.biotic communities

c.biomass

d.trophic levels

2. Viruses were discovered by

a.Twort

b.Herelle

c.Stanley

d.Iwanowiski

3. Islets of Langerhans secrete

a.insulin

b.none of these

c.glucagons

d.enzymes

4. Androgens are secreted from

a.Leydig cels and adrenal cortex

b.Leydig cells and placenta

c.Adenohypophysis and tesis

d.Testis and adrenal cortex

5. A motor nerve carries impulses from

a.from cranial nerves to the effectors

b.central nervous system to the effector

c.effectors to cranial nerves

d.effectors to central nervous system

6. A posterior pituitary hormone released during parturition is

a.Vasopressin

b.ICSH

c.Oxytocin

d.ACTH

7. A mammals which never drinks water is

a.shrew

b.spiny ant eater

c.kangaroo

d.kangaroo rat

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

a.stratum germinativum

b.epidermis

c.dermis

d.cornified cells

9. Which of these lives in water permanently?

a.Frogs

b.Necturus

c.Salamander

d.Ichthyophis

10. Sebaceous glands are found in

a.dermis of skin of mammals

b.epidermis of skin of mammals

c.epithelium of intestine of frog

d.epithelium of stomach of frog

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

a.species

b.order

c.class

d.family

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

a.lack of sufficient amount of erythrocytes

b.anaemic hypoxia

c.lack of sufficient amount of haemoglobin

d.arterial hypoxia

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

a.bracts

b.pappus

c.corolla

d.hooks

14. Sea cucumber belongs to class

a.Holothuroidea

b.Crinoidea

c.Asteroidea

d.Ophiuroidea

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

a.2 litres

b.5 litres

c.15 litres

d.10 litres

16. Oil in the skin is secreted by

a.sweat glands

b.hair follicles

c.mucous glands

d.sebaceous glands

17. The smallest cranial nerve is

a.olfactory

b.optic

c.abducens

d.auditory

18. Study of soil is called:

a.Pathology

b.Ecology

c.Nematology

d.Pedology

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

a.paedogenes

b.impotency

c.cryptorchidism

d.castration

20. Which of the following is commercially most valuable:

a.Spring wood

b.Heartwood

c.Autumnwood

d.Sapwood

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

a.pliohippus

b.miobibbus

c.eohippus

d.merychippus

22. The locomotor organs of Echinoderms is called

a.pseudopodia

b.tube feet

c.setae

d.parapodia

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

a.annelids

b.arthropods

c.coelenterates

d.sponges

24. Sexual reproduction or two fusing gametes of Spirogyra are

a.morphologically similar

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

c.morphologically and physiologically dissimilar

d.morophologically dissimilar

25. Colour blidness is caused due to

a.sex-linked abnormality

b.deficiency of vitamin C

c.absence of visual purple in retina

d.absence of rods in retina

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

a.development of sturdy eggs

b.evolution of terrestrial habit

c.occurrence of metamoophosis on amphibian

d.change over to herbivorous feeding

27. Female cone is absent in

a.Taxus

b.Pinus

c.Cycas

d.None of these

28. 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

29. The respiratory organs in a freshwater mussel are

a.gills

b.book lungs

c.pulmonary sacs

d.respiratory siphons

30. 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

31. Penicillium is a member of:

a.Basidiomycetes

b.Deuteromycetes

c.Phycomycetes

d.Ascomyectes

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

a.diapause

b.diakinesis

c.didelphis

d.diapedesis

33. The protein deficiency disease is known as

a.eczema

b.scurvy

c.mycoses

d.kwashiorkor

34. In human body, the number of bones is

a.406

b.106

c.206

d.306

35. Pharyngeal gill slits are found in

a.cuttle fish

b.shark

c.cray fish

d.star fish

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

a.stapes, incus, malleus

b.malleus, stapes, incus

c.incus, stapes, malleus

d.malleus, incus, stapes

37. The leaf lamina are generally reduced in

a.epiphytes

b.hydrophytes

c.mesophytes

d.xerophytes

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

a.None of these

b.Meiosis

c.Mitosis

d.Apomixis

39. Multiflagellate sperms are the characteristic of

a.Pogonatum

b.Riccia

c.Mosses

d.Ferns

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

a.Haemolysis

b.Haemopoiesis

c.Haemophilia

d.Haemaglutination

41. Chlorophyll contains

a.Mn

b.K

c.Mg

d.Fe

42. 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

43. Gametophytic generation is dominant in

a.Pteridophytes

b.Gymnosperms

c.Angiosperms

d.Bryophytes

44. Which of the following statements is correct?

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

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

c.Blood pigment of earthworm is haemocyanin

d.Blood of earthworm is blue in colour

45. The sickle cell anaemia results in

a.polychthemia

b.leukaemia

c.polycemia

d.polio

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

a.biogeographic evidence for evolution

b.none of these

c.palaentological evidence for evolution

d.homological evidence for evolution

47. The function of cristae in a mitochondrion is

a.elimination of Carbon Dioxide

b.electron transport and ATP synthesis

c.carbon assimilation

d.intake of Oxygen

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

a.platyhelminthes

b.porifera

c.coelenterate

d.protozoa

49. Ostia are meant to

a.ingest food

b.pass out water current

c.admit water current

d.excrete waste products

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

a.48

b.16

c.24

d.18

51. Phyllotaxy is the arrangement of

a.flower buds

b.branches

c.veins

d.leaves

52. Groundnut is

a.Cannabis sativa

b.Oryza sativa

c.Psidium guajava

d.Arachis hypogaea

53. Adams apple in man is

a.cartilages of the trachea

b.thyroid cartilage of larynx

c.epiglottis

d.cartilage of hyoid apparatus

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

a.placentation

b.gestation

c.parturition

d.ovuation

55. Fat soluble vitamins are

a.A, B and C

b.A, D and E

c.B, C and D

d.E, D and B

56. Which mosquito sits making an acute angle?

a.Anopheles

b.Aedes

c.Psorophora

d.Culex

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

a.cladode

b.none of these

c.phylloclade

d.phyllode

58. Which disease is caused by a nematode?

a.Leprosy

b.Amoebiasis

c.Poliomyelitis

d.Filariasis

59. The locomotion of snake is helped by

a.ribs and reduced limbs

b.ribs only

c.reduced ribs

d.reduced limbs

60. 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

61. Sponges belong to the phylum

a.sporozoa

b.mastigophora

c.coelenterate

d.porifera

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

a.uric acid and urea

b.urea and uric acid respectively

c.uric acid

d.urea

63. The 13-celled male gametophyte of Selaginella has

a.8 cells of antheridium + 5 prothallial cells

b.12 cells of antheridium + 1 prothallial

c.9 cells of antheridium + 4 prothallial

d.10 cells of antheridium + 3 prothallial cells

64. Anticoagulant secreted by leech is

a.Heparin

b.Hirudin

c.Haematin

d.Haemozoin

65. Which one of these is a cancerous disease

a.Angina

b.Leukaemia

c.Malaria

d.Kwashiorkor

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

a.mouth

b.alimentary canal

c.body cavity

d.a gastro vascular cavity

67. Germ theory of disease was proposed by

a.F. Jacob

b.L. Pasteur

c.T. Boveri

d.Robert Koch

68. 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.4,000 kcal/day

d.3,200 kcal/day

69. In rabbit, the danger signal is given by

a.sound

b.external ear

c.fore limbs

d.tail

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

a.Sphenodon

b.Peripatus

c.Balanoglossus

d.Limulus

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

a.short but broad abdomen and presence of anal styles

b.long but broad abdomen and anal cerci

c.Short but broad abdomen and absence of anal styles

d.short cut broad abdomen and anal cerci

72. Trophozoites of E.histolytica reproduced by

a.binary fission

b.budding

c.conjugation

d.autogamy

73. Colour is perceived by

a.cones in retina

b.cornea-lens complex

c.rods in retina

d.lense only

74. The study of migration of birds is called

a.Ecology

b.Ornithology

c.Phenology

d.Nidology

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

a.puberty

b.gestation

c.menstruation

d.menopause

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

a.flagellum

b.mitochondria located at the middle piece

c.sperm lysins released from the acrosome

d.acrosome

77. Among the following which is a test cross?

a.TT x Tt

b.Tt x tt

c.Tt x Tt

d.TT x TT

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

a.Cloaca

b.A pair of testes

c.A pair of ovaries and oviducts

d.A pair of large kidneys

79. Alternation of generations is otherwise known as

a.Dimorphism

b.Metagenesis

c.Biogenesis

d.Epigenesis

80. Dental formula of adult human being is

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

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

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

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

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

a.formation of pollen grains

b.formation of buds

c.formation of root primordia

d.germination of seed

82. Commercial source of citric acid is:

a.Yeast

b.Citrus fruit

c.Penicillium

d.Aspergillus

83. Sea hare is the common name of

a.Octopus

b.Aplysia

c.Sepia

d.Doris

84. Algae and fungi are characterised by the possession of

a.chloroplasts

b.multicellular jacketed sex organs

c.unicellular jacketed sex organs

d.embryo

85. The largest ovule in plant kingdom is seen is

a.Cycas circinalis

b.None of these

c.Cycas revolute

d.Both A and B

86. Colouration of frog is due to

a.inidescence of skin

b.presence of special chromatophores below the epidermal cells

c.presence of melanophores

d.growth of algal colonies of skin

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

a.mutualism

b.parasitism

c.commensalism

d.cooperation

88. Infection of Ascaris usually occurs by

a.imperfectly cooked pork

b.mosquito bite

c.contaminated water and vegetables

d.tse tse fly

89. Nematocysts of Hydra are important for

a.testing the food

b.testing the water

c.paralysing prey

d.cataching prey

90. The best indicator of SO2 pollution is

a.Algae

b.Lichens

c.Fungus

d.Ferns

91. Red rust of tea is caused by

a.Oedogonium

b.Pteris

c.Cephaleuros

d.Puccinia

92. Typically all mammals have seven vertebrae except

a.elephant

b.man

c.giraffe

d.sea cow

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

a.omnivores

b.herbivores

c.fruit eaters

d.carnivores

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

a.Influenza

b.Rabies

c.Small pox

d.Whooping cough

95. What is monothecous stamen?

a.It is a stamen with many lobes

b.It is a stamen with one lobe

c.It is a sterile stamen

d.It is a stamen with no lobes

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

a.pectoral fins

b.paired fins

c.anterior fins

d.ray fins

97. The deficiency of magnesium results in

a.leaf chlorosis

b.wilting of plants

c.interveinal chlorosis

d.none of these

98. Kala-azar is a disease caused by

a.Taenia solium transmitted by infected pork

b.Trypanosma gambiense transmitted by Tsetse fly

c.Leishmania donovani transmitted by sandfly

d.Wuchereria bancrofti transmitted by Culex

99. 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 ATG GTA GAT CTA

d.GTA ATC GAT GTA CTA

100. Syngamy means

a.fusion of gametes

b.fusion of dissimilar spores

c.fusion of cytoplasm

d.fusion of similar spores

Biology MCQ Question Answers – Practice MCQ Questions on Biology

Biology MCQ Question Answers for Various Entrance Exams

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