NEET/AIPMT-1994 Previous Year Solved Paper – Biology


1. Which among the following is likely to have the highest levels of D.D.T. depositions in its body?

[A] Sea gull

[B] Phytoplankton

[C] Eel

[D] Crab

ANSWER: –[A] Sea gull


2. Which one of the following gases contributes the maximum to the ‘green house effect’ on the earth?

[A] Carbon dioxide

[B] chlorofluoro carbon

[C] Freon

[D] methane

ANSWER: –[A] Carbon dioxide


3. The dominant second trophic level, in a lake ecosystem, is

[A] Phytoplankton

[B] Zooplankton

[C] Benthos

[D] Plankton

ANSWER: –[b] Zooplankton 


4. Sounds above what level are considered hazardous noise pollution?

[A] Above 80 dB

[B] Above 30 dB

[C] Above 150 dB

[D] Above 120 dB

ANSWER: –[D] Above 120 dB


5. Which of the following species does not have the ability to fix atmospheric nitrogen?

[A] Azotobactor

[B] Anabaena

[C] Nostoc

[D] Spirogyra

ANSWER: –[D] Spirogyra


6. The most important human activity, leading to the extinction of wildlife,

[A] Pollution of air and water

[B] Hunting for valuable wildlife products

[C] Introduction of alien species

[D] Alteration and destruction of the natural habitats

ANSWER: –[D] Alteration and destruction of the natural habitats


7. If excess water passes out from the tissue without being restored by the kidneys, the cell would

[A] Burst open and die

[B] Take water from the plasma

[C] Not be affected at all

[D] Shriver and die

ANSWER: –[C] Not be affected at all


8. Which one of the four parts mentioned below does not constitute a part of single uriniferous tubule?

[A] Distal convoluted tubule

[B] Collecting duct

[C] Bowman’s capsule

[D] Loop of Henle

ANSWER: –[B] Collecting duct


9. Which of the following does not have an open circulatory system?

[A] Frog’s tadpole

[B] Prawn

[C] Chelifer

[D] Cockroach

ANSWER: –[A] Frog’s tadpole


10. The pace setter in the heart is called

[A] Sino-atrial node(SAN)

[B] Atrio-ventricular node (AVN)
[C] Purkinje fibers

[D] Papillary muscle

ANSWER: –[B] Atrio-ventricular node (AVN)


11. In man and mammals, air passes from outside into the lungs through

[A] Nasal cavity, larynx, pharynx, trachea, bronchi, alveoli

[B] Nasal cavity, larynx, pharynx, trachea, bronchioles, alveoli

[C] Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoli

[D] Nasal cavity, pharynx, larynx,, trachea, bronchi, bronchioled,alveoli

ANSWER: –[D] Nasal cavity, pharynx, larynx,, trachea, bronchi, bronchioled,alveoli


12. Which of the follwing is correct pairing of site of action and substrate of rennin?

[A] Mouth-starch

[B] Small intestine-protein

[C] Stomach-casein

[D] Stomach-fat

ANSWER: –[C] Stomach-casein


13. What is true about cleavage in the fertilized egg in humans?

[A] It starts while the egg is in fallopian tube

[B] starts when the egg reaches uterus

[C] It is meroblastic

[D] It is identical to the normal mitosis

ANSWER: –[A] It starts while the egg is in fallopian tube


14. Theart sound’dub’ is produced when

[A] Mitral valve is closed

[B] Semi-lunar valves at the base of aorta get closed

[C] Tricuspid valve is opened

[D] Mitral valve is opened

ANSWER: –[B] Semi-lunar valves at the base of aorta get closed


15. The examples in which the nitrogenous wastes are excreted from body in the form of uric acid are

[A] Bird and lizards

[B] Frogs and cartilaginous fishes

[C] Insects and bony fishes

[D] Mammals and mollusc

ANSWER: –[A] Bird and lizards


16. The respiratory center, which regulates respiration, is located in

[A] Cerebellum

[B] Medulla oblongata

[C] Cerebral peduncle

[D] The vagus nerve

ANSWER: –[B] -Medulla oblongata


17. Prolonged deficiency of nicotinic acid caused

[A] Pellagra

[B] Xerophthalmia

[C] Osteomalacia

[D] Anaemia

ANSWER: –[A] Pellagra


18. The extra embryonic membranes of the mammalian embryo are derived from

[A] Trophoblast

[B] Inner cell mass

[C] Formative cells

[D] Follicle cells

ANSWER: –[A] Trophoblast


19. In the 28 days human ovarian cycle, the ovulation takes place typically on

[A] Day 14 of the cycle

[B] Day 28 of the cycle

[C] Day 1 of the cycle

[D] Day 5 of the cycle

ANSWER: –[A] Day 14 of the cycle


20. The immediate cause of induction of ovulation in human female is the large plasma surge of

[A] LH


[C] Progesterone

[D] Estradiol



21. The type of joint between the human skull bones is called

[A] Cartilaginous joint

[B] Hinge joint

[C] Fibrous joint

[D] Synovial joint

ANSWER: –[C] -Fibrous joint


22. Which of the following components is a part of the pectoral girdle?

[A] Sternum

[B] Acetabulum

[C] Glenoid cavity

[D] Ilium

ANSWER: –[C] Glenoid cavity


23. Which of the following is the function of enterogastrone?

[A] It inhibits the secretion of gastric juice

[B] It stimulates the secretion of digestive juices in the stomach

[C] It stimulates the flow of pancreatic juice

[D] It regulates the flow of bile.

ANSWER: –[A] It inhibits the secretion of gastric juice


24. An epithelial tissue which has thin flat cells, arranged edge to edge so as to appear like closely packed titles, is found to be present at

[A] Outer surface of ovary

[B] Inner lining of fallopian tube

[C] Inner lining of stomach

[D] Inner lining of cheeks

ANSWER: –[D] Inner lining of cheeks


25. A plant bears fruit, has a column of vascular tissue and a tap root system,
This plant is a

[A] Angiosperm and dicot

[B] Gymnosperm and dicot

[C] Angiosperm and monocot

[D] Gymnosperm and monocot

ANSWER: –[A] Angiosperm and dicot


26. Haploid plants can be obtained by culturing

[A] Pollen grains

[B] Root tips

[C] Young leaves

[D] Endosperm

ANSWER: –[A] Pollen grains


27. Besides giving out secretory vesicles, the Golgi apparatus is also concerned with the formation of

[A] Lysosomes

[B] Plastids

[C] Grana of chloroplast
[D] Cell plates after cells division in plants

ANSWER: –[A] Lysosomes


28. Which one of the following changes involved is irrelevant, in the evolution of man?

[A] Perfection of hand for tools making

[B] Change of diet from hard nuts and hard roots to soft food

[C] Loss of tail

[D] Increase in the ability to communicate with others and develop community behaviour

ANSWER: –[B] Change of diet from hard nuts and hard roots to soft food


29. Which of the following evidence does not favor the Lamarckian concept of inheritance of acquired characters?

[A] Lack of pigment in cave-dwelling animals

[B] Melanization in peppered moth

[C] Absence of limbs in snakes
[D] Presence of webbed toes in aquatic birds.

ANSWER: –[B] Melanization in peppered moth


30. Coelom derived from blastocoel is known as

[A] pseudocoelom

[B] Schizocoel

[C] Haemocoesl

[D] Enterocoelom

ANSWER: –[A] Pseudocoelom


31. A common characteristic of all vertebrates without exception is

[A] The dividion of body into head, neck, trunk and tail

[B] Their body covered with an exoskelton

[C] The possession of two pairs of functional appendages

[D] The presence of well-development skull

ANSWER: –[D] The presence of well-development skull


32. Tube feet are the characteristic structures of

[A] Starfish

[B] Jelly fish

[C] Caryfish

[D] Cuttlefish

ANSWER: –[A] Starfish


33. Among the following organisms point out a completely non-parasitic form

[A] Tape worm

[B] Mosquito

[C] Sea anemone

[D] Leech

ANSWER: –[C] Sea anemone


34. Which of the following is an example of Platyhelminthes?

[A] Plasmodium

[B] Schistosoma

[C] Trypanosoma

[D] Wuchereria

ANSWER: –[B] Schistosoma


35. Radial symmetry is, usually, exhibited in animals which

[A] Are attached to the substratum

[B] Have one opening of alimentary canal

[C] Live in water

[D] Have ciliary mode of feeding

ANSWER: –[d] Have one opening of alimentary canal


36. One of the special characters of Coelenterata only in the occurrence of

[A] Polymorphism

[B] Flame cells

[C] Hermaphroditism

[D] Nematocysts

ANSWER: –[D] Nematocysts


37. There are special proteins that help to open up DNA double helix in front of the replication fork. These proteins are

[A] DNA ligase

[B] DNA topoisomerase I

[C] DNA gyrase

[D]  DNA polymerase I

ANSWER: –[B] DNA topoisomerase I


38. Initiation codon in eukaryotes is







39. The earliest fossil form, in the phylogeny of horse, is

[A] Equus

[B] Mesohippus

[C] Eohippus

[D] Merychippus

ANSWER: –[C] Eohippus


40. Which of the following is a pair of homologous organs?

[A] Pectoral fin of rohu and fore-limb of horse

[B] Wings of grasshopper and wings of crow

[C] Lungs of rabbit and fills of rohu

[D] Wings of bat and wings of butterfly

ANSWER: –[A] Pectoral fin of rohu and fore-limb of horse


41. Plant, but not animals, can convert fatty acids to sugars by a series of reactions called

[A] Photosynthesis

[B] Kreb’s cycle

[C] Glycolysis

[D] Glyoxylate cycle

ANSWER: –[D] Glyoxylate cycle


42. In a somatic cell cycle, DNA synthesis takes place in

[A] G1 phase

[B] Prophase of mitosis

[C] S-phase

[D] G2 phase

ANSWER: –[C] S-phase


43. The inner membrane of the mitochondria is, usually, highly convoluted forming a series of in foldings known as

[A] Thylakoids

[B] Lamellae

[C] Cristae

[D] Grana

ANSWER: –[C] Cristae


44. Which one of the following organelles is located near the nucleus and contains a collection flattened membrane bound cisternae

[A] Nucleolus

[B] Mitochondrion

[C] Centriole

[D] Golgi apparatus

ANSWER: –[D] Golgi apparatus


45. Centromere is required for

[A] Replication of DNA

[B] Chromosome segregation

[C] Poleward movement of chromosomes

[D] Cytoplasmic cleavage

ANSWER: –[C] Poleward movement of chromosomes


46. Which of the following represents the best stage to view the shape, size, and number of chromosomes?

[A] Prophase

[B] Metaphase

[C] Interphase

[D] Telophase

ANSWER: –[B] Metaphase


47. The first phase in the breakdown of glucose, in animal cell, is

[A] Fermentation

[B] Kreb’s cycle

[C] Glycolysis

[D] E.T.S.

ANSWER: –[C] Glycolysis


48. In protein synthesis, the polymerization of amino acids involves three steps. Which one of the following is not involved in the polymerization of protein?

[A] Termination
[B] Initiation

[C] Elongation

[D] Transcription

ANSWER: –[D] Transcription


49. In mitochondria, cristae act as sites for

[A] Protein synthesis

[B] Phosphorylation of flavoproteins

[C] Breakdown of macromolecules

[D] Oxidation-reduction reaction

ANSWER: –[D] Oxidation-reduction reaction


50. A red blood cell was kept in a solution for a few minutes, where it got burst, The solution taken was

[A] Hypotonic

[B] Concentrated sugar solution

[C] Isotonic

[D] Hypertonic

ANSWER: –[A] Hypotonic

51. Which of the following organelles contain enzymes that have digestive action?

[A] Ribosomes

[B] Polysomes

[C] Plastids

[D] Lysosomes

ANSWER: –[D] Lysosomes


52. The four elements that make up 99% of all elements found in a living system are

[A] C, H, O, and P

[B] C, N, O, and P

[C] H, O, C,and N

[D] C, H, O, and S

ANSWER: –[C] H, O, C and N


53. When yeast ferments glucose, the products obtained are

[A] Ethanol and CO2

[B] Methanol and CO2

[C] Ethanol and water

[D] Water and CO2

ANSWER: –[A] Ethanol and CO2 


54. Which of the following organelles is related to genetic engineering?

[A] Mitochondria

[B] Plasmids

[C] Golgi bodies

[D] Lysosomes

ANSWER: –[C] Plasmids


55. Organism, which fixes atmospheric nitrogen in the soil, fall under the category of

[A] Bacteria

[B] Green algae

[C] Soil fungi

[D] Mosses

ANSWER: –[A] Bacteria


56. The color blindness is more likely to occur in males than in females because

[A] The Y-chromosome of males have the genes for distinguishing colors

[B] Genes for characters are located on the sex-chromosomes

[C] The trait is dominant in males and recessive in females

[D] None of these

ANSWER: –[B] Genes for characters are located on the sex-chromosomes


57. A cell-coded protein that is formed in response to infection, with most animal viruses, is called

[A] Histone

[B] Antibody

[C] Interferon

[D] Antigen

ANSWER: –[C] Interferon


58. Which of the following statements is correct with reference to a test tube baby?

[A] Fertilization of the egg is effected outside the body; the fertilized egg is then placed in the womb of the mother where the gestation is completed

[B] Fertilization of the egg is effected in the female ganital tract. It is then taken out and grown in a large test tube

[C] A prematurely born baby is reared in an incubator

[D] Fertilizationof the egg and growth of the embryo are affected in a large test tube.

ANSWER: –[A] Fertilization of the egg is effected outside the body; the fertilized egg is then placed in the womb of the mother where the gestation is completed


59. Albinism is a congenital disorder resulting from the lack of the enzyme

[A] Tyrosinase

[B] Xanthine oxidase

[C] catalase

[D] Fructokinase

ANSWER: –[A] Tyrosinase


60. A sisease caused by eating fish contaminated by industrial waste, containing mercury compound, is called

[A] Osteosclerosis

[B] Hashimoto’s oxidase

[C] Bright’s disease

[D] Minimata disease

ANSWER: –[D] Minimata disease


61. Which one of the following is correctly matches a sexually transmitted disease with its pathogen

[A] Syphilis – Treponema pallidium

[B] Gonorrhoes – Entamoeba histolytics

[C] Urethritis – Bacillus anthracis

[D] Softsore – Bacillus brevis

ANSWER: –[A] Syphilis – Treponema pallidium


62. Silk is produced by

[A] Adult moth

[B] Cocoon

[C] Larva

[D] Both {A] and [B]

ANSWER: –[C] Larva


63. Which among the following is the real product of the honey bee?

[A] Honey

[B] Propolis

[C] Pollin

[D] Bee wax

ANSWER: –[D] Bee wax


64. The main reason why antibodies could not solve all the problems of bacteria mediated disease is

[A] Descreased efficiency of the immune system

[B] Insensitivity of the individual following prolonged exposure to antibiotics

[C] Development of mutant strains resistant to antibodies

[D] Inactivation of antibiotics by bacterial enzyme

ANSWER: –[C] Development of mutant strains resistant to antibodies


65. Tobacco mosaic virus (TMV)are

[A] Single stranded RNA

[B] Double strnded DNA

[C] Proteinaceous

[D] Double stranded RNA

ANSWER: –[A] Single stranded RNA


66. Biological control of agricultural pests, unlike chemical control, is

[A] Self perpetuation

[B] Polluting

[C] Very expensive

[D] Toxic
ANSWER: –[A] Self perpetuation


67. Calcium deficiency in the body occurs in the absence of

[A] Vitamin C

[B] Vitamin D

[C] Vitamin B

[D] Vitamin E

ANSWER: –[B] Self perpetuation


68. In cheese manufacture, the microorganism are important for

[A] The ripenign only

[B] The souring of milk only

[C] The development of resistance to spilage only

[D] Both souring and the ripening processes.

ANSWER: –[D] Both souring and the ripening processes.


69. ‘Lac operon’ in E.coli, is induced by

[A] ‘I’ gene

[B] Promoter gene

[C] Β- galactosidase

[D] Lactose

ANSWER: –[C] Β- galactosidase


70. Transduction in bacteria is mediated by

[A] Plasmid vectors

[B] Phage vectors

[C] Cosmids

[D] F-factors

ANSWER: –[B] Phage vectors


71. Which of the following statements is correct?

[A] Legumes fix nitrogen only through the specialized bacteria that live in their roots

[B] Legumes fix nitrogen independently of the specialized bacteria that live in their roots

[C] Legumes fix nitrogen only through specialized bacteria that live in their leaves

[D] Legumes are incapable of fixing nitrogen.

ANSWER: –[A] Legumes fix nitrogen only through the specialized bacteria that live in their roots


72. Which of the follwing nucleotide sequences contains 4 pyrimidine bases?




[D] Both [B] and[C]



73. A child’s blood groups is’O’. The paren’s blood groups cannot be

[A] A and B

[B] A and A

[C] AB and O

[D] B and O

ANSWER: –[C] AB and O


74. Which statement best explanins the evvolutionary advantage of meiosis?

[A] Meiosis is necessary for sexual reproduction

[B] Genetic recombinations are possible from generation to generation

[C] Meiosis alternates with mitosis for generation to generation

[D] The same genetic system is passed on from generation to generation

ANSWER: –[B] Genetic recombinations are possible from generation to generation


75. A metastatic cancerous tumour is termed ‘sarcoma’ if the disorder is in

[A] Fibroblasts

[B] Circulatory system

[C] Immune system

[D] Epithelial cells

ANSWER: –[A] Fibroblasts


76. Normally DNA molecule has A-T, G-C pairing. However, these bases can eist in alternative valency status, owing to rearrangements called

[A] Frame-shift mutation

[B] Tautomerisational mutation

[C] Analog substitution

[D] Point mutation

ANSWER: –[B] Tautomerisational mutation


77. The genes, which ramain confined to differential region of Y-chromosome,

[A] Autosomal genes

[B] Holandric genes

[C] Completely sex-linked genes

[D] Mutant genes

ANSWER: –[B] Holandric genes


78. The process of mating of individuals, which are more closely related than the average of the population to which thy belong, is called

[A] Heterosis

[B] Self breeding

[C] Inbreeding

[D] Hybridization

ANSWER: –[C] Inbreeding


79. The nuclease enzyme, which begins its attack from free end of a polynucleotide, is

[A] Polymerase

[B] Endonuclease

[C] Exonucleae

[D] Kinase

ANSWER: –[C] Exonucleae


80. The ultimate respiratory substrate, yielding maximum number of ATP molecules,

[A] Glycogen

[B] Ketogenic amino acid

[C] Glucose

[D] Amylose

ANSWER: –[C] Glucose


81. Poisons like cynide inhibit Na+ efflux and K+ influx during cellular transport. This inhibitory effect is reversed by an injection of ATP. This demonstrates that

[A] ATP is the carrier protein in the transport system

[B] Energy for Na+-K+ exchange pump comes from ATP

[C] ATP is hydrolysed by ATPase to release energy

[D] Na+-K+ exchange pump operates in the cell

ANSWER: –[B] Energy for Na+-K+ exchange pump comes from ATP


82. During light reaction of photosynthesis, which of the following phenomenon is observed during cyclic phosphorylation as well as non-cyclic phosphorylation as well as non-cylic phosphorylation?

[A] Releae of O2

[B] Formation of ATP

[C] Formation of NADPH

[D] Involvement of PS I &PS II pigment systems.

ANSWER: –[B] Formation of ATP


83. As a tree grows older, which of the following increases more rapidly in thickness?

[A] Heart wood

[B] Sap wood

[C] Phloem

[D] Cortex

ANSWER: –[A] Heart wood


84. Casparian strip occurs in a

[A] Endodermis

[B] Exodermis

[C] Pericycle

[D] Epidermis

ANSWER: –[A] Endodermis


85. The 1992 Nobel Prize for medicine was awarded to Edmond H. Fischer and Edwin J.Krebs for their work concerning

[A] Reversible protein phosphorylation as a biological regulation machenism

[B] Isolation of the gene for a human disease

[C] Human genome project

[D] Drug designing involving inhibition of DNA synthesis of the pathogen.

ANSWER: –[A] Reversible protein phosphorylation as a biological regulation machenism


86. Prochambium is situated just behind apical maristem. Procambium gives rise to

[A] Primary vascular bundle

[B] Vascular cambium

[C] Cork cambium

[D]  both [A] and [B]

ANSWER: –[B] Vascular cambium


87. Which of the following molecule act as reaction-center during photosynthesis

[A] Carotene

[B] Phytochrome

[C] P700

[D] Cytochrome

ANSWER: –[C] P700


88. Embryo sac represents

[A] Megaspore

[B] Megagametophyte

[C] Megasporophyll

[D] Megagamete

ANSWER: –[B] Megagametophyte


89. When pollen of a flower transferrred to the stigma of another flower of the same plant, the pollination is referred to as

[A] Autogamy

[B] Geitonogamy

[C] Xenogamy

[D] Allogamy

ANSWER: –[B] Geitonogamy


90. If the growing part is decapitated then

[A] Its growth stops

[B] Leaves become yellow and fall down

[C] Axillary buds are inactivated

[D] Axillary buds are activated

ANSWER: –[D] Axillary buds are activated


91. The movement of auxin is largely

[A] Centripetal

[B] Basipetal

[C] Acropetal

[D] Both [A] and[c]

ANSWER: –[B] Basipetal


92. Rikettsiae form a group under

[A] Viruses

[B] Bacteria

[C] Fungi

[D] A category between viruses and bacteria

ANSWER: –[B] Bacteria


93. Hypanthodium is as specilaized type of

[A] Fruit

[B] Inflorescence

[C] Thalamus

[D] Ovary

ANSWER: –[B] Inflorescence


94. In bryophytes

[A] Both generations are independent

[B] Gametophytes are dependent upon sporophytes

[C] Sporophytes complete their life cycle

[D] Sporophytes are dependent upon gametophytes

ANSWER: –[D] Sporophytes are dependent upon gametophytes


95. In Pinus, the wing of the seed develops from

[A] Ovuliferous scale

[B] Integument

[C] Nucellus

[D] Bract

ANSWER: –[A] Ovuliferous scale


96. In chlorophyceae, the mode of sexual reproduction is

[A] Isogamy

[B] Anisogamy

[C] Oogamy

[D] All of these

ANSWER: –[D] All of these


97. The protists have

[A] Only free nucleic acid aggregates

[B] Membrane bound nucleo proteins lying embedded in the cytoplasm

[C] Gene containing nucleoproteins condensed together in loose mass

[D] Nucleoprotein in direct contact with the rest of the cell substance

ANSWER: –[B] Membrane bound nucleo proteins lying embedded in the cytoplasm


98. Mycorrhiza exhibits the phenomenon of

[A] Parasitism

[B] Symbiosis

[C] Antagonism

[D] Endemism

ANSWER: –[B] Symbiosis


99. Many blue-green algae occur in thermal springs (hot water springs). The temperature tolerance of these algae have een attributed to their

[A]  Mitochondrial structure

[B] Important of homopolar bonds in their proteins

[C] Cell wall structure

[D] Modern cell organization

ANSWER: –[C] Cell wall structure


100. Phylogenetic classification is one which is based on

[A] Overall similarities

[B] Utilitarian system

[C] Habitat of plants

[D] Common evolutionary descent

ANSWER: –[D] Common evolutionary descent

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