NEET

1. Angiosperms have dominated the land flora primarily because of their

nature of self pollination
power of adaptability in diverse habitat
domestication by man
property of producing large number of seeds

2. Which one of the following aspects is an exclusive characteristic of living things?

Perception of events happening in the environment and their memory
Isolated metabolic reactions occur in vitro
Increase in mass by accumulation of material both on surface as well as internally.
Increase in mass from inside only

3. Which one of the following animals is correctly matched with its particular named taxonomic category?

Humans - primata, the family
Tiger - tigris, the species
Housefly - musca, an order
Cuttle fish - mollusca, a class

4. Which one of the following is considered important in the development of seed habit?

Haplontic life cycle
dependent sporophyte
Free -living gametophyte
Heterospory

5. Which one of the following is not a correct statement?

Key is taxonomic aid for identification of specimens.
Botanical gardens have collection of living plants for reference.
Herbarium houses dried, pressed and preserved plant specimens.
A museum has collection of photographs of plants and animals

6. Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and correctly described?

Felis tigris - The Indian tiger, well protected in Gir forests.
Musca domestica - The common house lizard, a reptile.
E.coli - Full name Entamoeba coli, a commonly occurring bacterium in human intestine.
Plasmodium falciparum – A protozoan pathogen causing the most serious type of malaria.

7. Lichens indicate SO2 pollution because they

are sensitive to SO2
show association between algae and fungi
flourish in SO2 rich environment
grow faster than others

8. The infective stage of malarial parasite Plasmodium that enters human body is

trophozoite
merozoite
minuta form
sporozoite

9. The plasmids pesent in the bacterial cells are

linear double helical DNA molecules
circular double helical DNA molecules
linear double helical RNA molecules
circular double helical RNA molecules

10. Which fungal disease spreads by seed and flowers?

Covered smut of barley
Loose smut of wheat
Soft rot of potato
Corn stunt

11. Which of the following statements is not true for retroviruses?

DNA is not present at any stage in the life cycle of retroviruses
The genetic material in mature retroviruses is RNA
Retroviruses are causative agents for certain kinds of cancer in man
Retroviruses carry gene for RNAdependent DNA polymerase

12. Which one of the following pairs is not correctly matched

Spirulina - Single cell protein
Streptomyces - Antibiotic
Rhizobium - Biofertilizer
Serratia - Drug addiction

13. Lichens are well known combination of an alga and a fungus where fungus has

a parasitic relationship with the alga
a saprophytic relationship with the alga
a symbiotic relationship with the alga
an epiphytic relationship with the alga

14. Tobacco mosaic virus is a tubular filament of size

300 × 5 nm
300 × 20 nm
700 × 30 nm
300 × 10 nm

15. Which one of the following statements about viruses is correct?

Viruses are obligate parasites
All viruses contain both RNA and DNA
Nucleic acid of viruses is known as capsid
Viruses possess their own metabolic system

16. For retting of jute the fermenting microbe used is

Helicobactor pylori
Methophilic bacteria
Streptococcus lactin
Butyric acid bacteria

17. All of the following statements concerning the Actinomycetes filamentous soil bacterium Frankia are correct except that Frankia:

Cannot fix nitrogen in the free-living state.
Forms specialized vesicles in which the nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoids
Can induce root nodules on many plant species
Like Rhizobium, it usually infects its host plant through root hair deformation and stimulates cell proliferation in the host’s cortex

18. Auxopores and hormocysts are formed, respectively, by

Several cyanobacteria and several diatoms
Some diatoms and several cyanobacteria
Several diatoms and a few cyanobacteria.
Some cyanobacteria and diatoms

19. Viruses that infect bacteria, multiply and cause their lysis, are called

lytic
lysozymes
lysogenic
lipolytic

20. The most thoroughly studied fact of the known bacteriaplant interactions is the

gall formation on certain angiosperms by Agrobacterium

21. The thalloid body of a slime mould (Myxomycetes) is known as

mycelium
plasmodium
protonema
fruiting body

22. Thermococcus, Methanococcus and Methanobacterium exemplify:

Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
Archaebacteria that contain protein homologous to eukaryotic core histones
Bacteria that contain a cytoskeleton and ribosomes
Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled

23. In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea ?

Archaea completely differ from both prokaryotes and eukaryotes
Archaea resemble eukarya in all respects
Archaea completely differ from prokaryotes.
Archaea have some novel features that are absent in other prokaryotes and eukaryotes

24. Bacterial leaf blight of rice is caused by a species of

Alternaria
Xanthomonas
Erwinia
Pseudomonas

25. Which one of the following sets of items in the options 1 - 4 are correctly categorized with one exception in it? Items- Category- Exception

Plasmodium, Cuscuta, Trypanosoma -Protozoan parasites- Cuscuta
UAA, UAG, UGA -Stop codons -UAG
Typhoid, Pneumonia, Diphtheria -Bacterial diseases -Diphtheria
Kangaroo, Koala, Wombat -Australian marsupials -Wombat

26. In the five-kingdom classification, Chlamydomonas and Chlorella have been included in

plantae
protista
monera
algae

27. How many organisms in the list given below are autotrophs? Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosomes, Porphyra, Wolffia

Six
Four
Three
Five

28. Which of the following plants produces seeds but not flowers?

Peepal
Maize
Pinus
Mint

29. Peat Moss is used as a packing material for sending flowers and live plants to distant places because

it serves as a disinfectant
it is hygroscopic
it is easily available
It reduces transpiration

30. In a moss the sporophyte

manufactures food for itself as well as for the gametophyte
produces gametes that give rise to the gametophyte
is partially parasitic on the gametophyte
arises from a spore produced from the gametophyte

31. If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?

chemical composition of the cell wall
nature of stored food materials in the cell
types of pigments present in the cell.
structural organization of thallus

32. In the prothallus of a vascular cryptogam, the antherozoids and eggs mature a different times. As a result

self-fertilization is prevented
there is high degree of sterility
there is no change in success rate of fertilization
one can conclude that the plant is apomictic

33. Conifers differ from grasses in the

formation of endosperm before fertilization
lack of xylem tracheids
production of seeds from ovules
absence of pollen tubes

34. Which one of the following plants is monoecious?

Papaya
Pinus
Marchantia
Cycas

35. Necturus is

Mud Puppy
Hell Bender
Blind Worm
Congo Eel

36. In contrast to Annelids the Platyhelminths show:

Radial symmetry
Absence of body cavity
Presence of pseudocoel
Bilaterial symmetry

37. From the following statements select the wrong one.

Millepedes have two pairs of appendages in each segment of the body
Prawn has two pairs of antennae
Animals belonging to Phylum Porifera are exclusively marine
Nematocysts are characteristic of the Pylum Cnidaria

38. Which one of the following characters is not typical of the class Mammalia?

Ten pairs of cranial nerves
Thecodont dentition
Seven cervical vertebrae
Alveolar lungs

39. In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen?

Crustacea
Insecta
Arachnida and Crustacea
Myriapoda

40. Two common characters found in centipede, cockroach and crab are

Book lungs and antennae
Jointed legs and chitinous exoskeleton
Compound eyes and anal cerci
Green gland and tracheae

41. Which one of the following is the true description about an animal concerned?

Rat - Left kidney is slightly higher in position than the right one
Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
Cockroach - 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
Frog - Body divisible into three regions - head, neck and trunk

42. Which one of the following is NOT a characteristic of phylum Annelida?

Pseudocoelom
Closed circulatory system
Ventral nerve cord
Segmentation

43. Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? Animals Morphological - feature

Scorpion, Spider, - Ventral solid central Cockroach nervous system
Liver fluke, Sea - Bilateral anemone, Sea symmetry cucumber
Cockroach, - Metameric Locust, Taenia segmentation
Centipede, Prawn- Jointed appendages Sea urchin

44. Ascaris is characterized by

presence of true coelom but absence of metamerism
absence of true coelom but presence of metamerism
presence of true coelom and metamerism (metamerisation)
presence of neither true coelom nor metamerism

45. Which one of the following phyla is correctly matched with its two general characteristics?

Echinodermata - Pentamerous radial symmetry and mostly internal fertilization
Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae
Mollusca - Normally oviparous and development through a trochophore or veliger larva
Chordata - Notochord at some stage and separate anal and urinary openings to the outside

46. What will you look for to identify the sex of the following?

Female cockroach-Anal cerci
Female Ascaris- Sharply curved posterior end
Male shark-Claspers borne on pelvic fins
Male frog- A copulatory pad on the first digit of the hind limb

47. Which one of the following statements about certain given animals is correct?

Insects are pseudocoelomates
Round worms (Aschelminthes) are pseudocoelomates
Flat worms (Platyhelminthes) are coelomates
Molluscs are acoelomates

48. Which one of the following kinds of animals are triploblastic?

Ctenophores
Flat worms
Corals
Sponges

49. Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?

Spongilla has special collared cells called choanocytes, not found in the remaining three
Penguin is homeothermic while the remaining three are poikilothermic
All are bilaterally symmetrical
Leech is a fresh water form while all others are marine

50. One example of animals having a single opening to the outside that serves both as mouth as well as anus is:

Ascidia
Octopus
Fasciola
Asterias

51. Which one of the following statements is totally wrong about the occurrence of notochord, while the other three are correct?

It is absent throughout life in humans from the very beginning
It is present only in larval tail in Ascidians
It is present throughout life in Amphioxus
It is replaced by a vertebral column in adult frog

52. In which one of the folllowing, the genus name, its two characters and its class/phylum are correctly matched? Genus name --Two characters --Class/ phylum

Pteropus --(i) Skin possesses hair Mammalia (ii) Oviparous--Mamalia
Ascaris --(i) Body segmented Annelida (ii) Males and females distinct -- Anelida
Aurelia --(i) Cnidoblasts Coelenterata (ii) Organ level of organization-- Coelenterata
Salamandra --(i) A tympanum represents ear Amphibia (ii) Fertilization is external --Amphibia

53. Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

Reptilia: possess 3 - chambered heart with one incompletely divided ventricle
Chondrichthyes: possess cartilagious endoskeleton
Mammalia: give birth to young one.
Chordata: possess a mouth provided with an upper and lower jaw

54. Which one of the following have the highest number of species in nature?

Birds
Fungi
Angiosperms
Insects

55. Which group of animals belong to the same phylum?

Sponge, Sea anemone, Starfish
Earthworm, Pinworm, Tapeworm
Malarial parasite, Amoeba, Mosquito
Prawn, Scorpion, Locusta

56. Which one of the following animals is correctly matched with its one characteristics and the taxon? Animal Characteristic Taxon

Sea Anemone -- Triploblastic -- Cnidaria
Duckbilled -- Oviparous -- Mammalian platypus
Silverfish-- Pectoral and Chordata -- Pelvic fins
Millipede -- Ventral nerve -- Arachnida cord

57. The characteristics of class Reptilia are:

Fresh water animals with bony endoskeleton, air-bladder to regulate buoyancy
Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears
Marine animals with cartilaginous endoskeleton, body covered with placoid scales
Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca

58. Which of the following are correctly matched with respect to their taxonomic classification?

Spiny anteater, sea urchin, sea cucumberEchinodermata
Centipede, millipede, spider, scorpionInsecta
Flying fish, cuttlefish, silverfish-Pisces
House fly, butterfly, tse tse fly, silverfishInsecta

59. Match the name of the animal (column I), with one characteristics (column II), and the phylum/class (column III) to which it belongs :

Adamsia -- radially Porifera -- symmetrical
Ichthyophis -- terrestrial -- Reptilia
Petromyzon-- ectoparasite -- Cyclostomata
Limulus -- body Pisces covered by chitinous -- exoskeleton

60. Perisperm is

peripheral part of endosperm
remnant of endosperm
disintegrated secondary nucleus
persistent nucellus

61. Micropyle of seed is involved in the passage of

water
male gamete
gases
pollen tube

62. Chlorenchyma is known to develop in the

mycelium of a green mould such as Aspergillus
pollen tube of Pinus
spore capsule of a moss
cytoplasm of Chlorella

63. The apical meristem of the root is present

only in tap roots
in all the roots
only in adventitious roots
only in radicals

64. The cells of the quiescent centre are characterised by

having light cytoplasm and small nuclei
dividing regularly to add to tunica
dividing regularly to add to the corpus
having dense cytoplasm and prominent nuclei

65. Which of the following statements is true?

Vessels are unicellular with wide lumen
Vessels are multicellular with narrow lumen
Tracheids are unicellular with wide lumen
Tracheids are multicellular with narrow lumen

66. Which one of the following is resistant to enzyme action?

Pollen exine
Cork
Leaf cuticle
Wood fibre

67. Vascular tissues in flowering plants develop from:

periblem
phellogen
dermatogen
plerome

68. The length of different internodes in a culm of sugarcane is variable because of

size of leaf lamina at the node below each internode
shoot apical meristem
intercalary meristem
position of axillary buds

69. Which one of the following is not a lateral meristem?

Phellogen
Intrafascicular cambium
Intercalary meristem
Interfascicular cambium

70. The chief water conducting elements of xylem in gymnosperms are:

fibres

71. In Kranz anatomy, the bundle sheath cells have

thick walls, no intercellular spaces and large number of chloroplasts

72. Some vascular bundles are described as open because these

(4) are capable of producing secondary xylem and phloem

73. The kind of epithelium which forms the inner walls of blood vessels is:

ciliated columnar epithelium
cuboidal epithelium
squamous epithelium
columnar epithelium

74. Compared to those of humans, the erythrocytes in frog are

nucleated and with haemoglobin
very much smaller and fewer
Without nucleus but with haemoglobin
nucleated and without haemoglobin.

75. The type of muscles present in our:

intestine are striated and involuntary

76. Which of the following statement regarding mitochondrial membrane is not correct?

The inner membrane is highly convoluted forming a series of infoldings

77. Protein synthesis in an animal cell occurs

on-ribosomes present in the nucleolus as well as in cytoplasm
only on the ribosomes present in cytosol
on ribosomes present in cytoplasm as well as in mitochondria
only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

78. Centromere is required for:

crossing over
movement of chromosomes towards poles
transcription
cytoplasmic cleavage

79. For best resolution, a student studying cell structure with a 10X eyepiece and 45X objective should illuminate the object with which light color?

Yellow
Blue
Red
Green

80. Polysome is formed by

a ribosome with several subunits
several ribosomes attached to a single mRNA
ribosomes attached to each other in a linear arrangement
many ribosomes attached to a strand of endoplasmic reticulum

81. Which one of the following is not a constituent of cell membrane?

phospholipids
glycolipids
cholesterol
proline

82. Select the wrong statement from the following

The chloroplasts are generally much large than mitochondria
Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
Both chloroplasts and mitochondria contain an inner and an outer membrane.
Both chloroplasts and mitochondria contain DNA

83. Cytoskeleton is made up of:

proteinaceous filaments
callose deposits
calcium carbonate granules
cellulosic microfibrils

84. Minor changes at gene level are described as

Reverse mutations
Point mutations
Forward mutations
Chromosomal mutations

85. Lactose is composed of

Fructose + Galactose
Glucose + Glucose
Glucose + Galactose.
Glucose + Fructose

86. Cellulose, the most important constitutent of plant cell wall is made of

unbranched chain of glucose molecules linked by b-1, 4 glycosidic bond
unbranched chain of glucose molecules linked by a-1, 4 glycosidic bond
branched chain of glucose molecules linked by a-1, 6 glycosidic bond at the site of branching.
branched chain of glucose molecules linked by b-1, 4 glycosidic bond in straight chain and a-1, 6 glycosidic bond at the site of branching

87. The enormous diversity of protein molecules is due mainly to the diversity of

amino acid sequences within the protein molecule
amino groups on the amino acids
peptide bonds
R groups on the amino acids

88. A phosphoglycerate is always made up of:

a saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule.
only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

89. In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to

independent assortment and crossing over
segregation, independent assortment and crossing over
segregation and independent assortment
segregation and crossing over

90. Mitotic anaphase differs from metaphase in possessing

half number of chromosomes and same number of chromatids
same number of chromosomes and same number of chromatids
same number of chromosomes and half number of chromatids
half number of chromosomes and half number of chromatids

91. Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle

Formation of the contractile ring, and formation of the phragmoplast
Decondensation from chromosomes, and reassembly of the nuclear lamina
Formation of the contractile ring, and transcription from chromosomes
Transcription from chromosomes, and reassembly of the nuclear lamina

92. In the somatic cell cycle

a short interphase is followed by a long mitotic phase
In G1 phase DNA content is double the amount of DNA present in the original cell
G2 phase follows mitotic phase
DNA replication takes place in S-phase

93. If a diploid cell is treated with colchicine then it becomes

diploid
triploid
monoploid
tetraploid

94. The translocation of organic solutes in sieve tube members is supported by

cytoplasmic streaming
P-proteins
root pressure and transpiration pull
mess flow involving a carrier and ATP

95. Sulphur is an important nutrient for optimum growth and productivity in

oilseed crops
cereals
pulse crops
fibre crops

96. Potometer works on the principle of

root pressure
osmotic pressure
potential difference between the tip of the tube and that of the plant
amount of water absorbed equals the amount transpired

97. The function of leg haemoglobin in the root nodules of legumes is:

inhibition of nitrogenase activity
expression of nif gene
oxygen removal
nodule differentiation

98. Nitrifying bacteria:

convert proteins into ammonia
oxidize ammonia to nitrates
reduce nitrates to free nitrogen
convert free nitrogen to nitrogen compounds

99. Which one of the following elements in plants is not remobilised?

Potassium
Phosphorus
Sulphur
Calcium

100. Which group of three of the following five statements (a-e) contain is all three correct statements regarding beri-beri?

a nutritional disorder in infants and young children when the diet is persistently deficient in essential protein;
a crippling disease prevalant among the native population of sub-Saharan Africa;
occurs in those countries where the staple diet is polished rice; (e) the symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure;
a deficiency disease caused by lack of thiamine (vitamin B1)

101. .The richest sources of vitamin B12 are

Rice and hen’s egg
Goat’s liver and Spirulina
Carrot and chicken’s breast
Chocolate and green gram

102. Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease?

Vitamin A – Fat-soluble – Beri-beri
Vitamin A – Fat-soluble – Night blindness
Vitamin K – Water-soluble – Pellagra
Vitamin K – Fat-Soluble – Beri-beri

103. What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

In the absence of HCI secretion, inactive pepsinogen is not converted into the active enzyme pepsin
Gastric juice will be deficient in chymosin
Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin
Gastric juice will be deficient in pepsinogen

104. If for some reason our goblet cells are non functional, this will adversely affect:

maturation of sperms
production of somatostatin
smooth movement of food down the intes-tine
secretion of sebum from the sebaceous glands

105. Which one of the following pairs of food components in humans reaches the stomach totally undigested?

Starch and cellulose
Starch and fat
Protein and starch
Fat and cellulose

106. Which one of the following statements is true regarding digestion and absorption of food in humans?

About 60% of starch is hydrolysed by salivary amylase in our mouth
Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.
Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.

107. The alveolar epithelium in the lungs is

ciliated columnar
nonciliated columnar
ciliated squamous
nonciliated squamous

108. Skin is an accessory organ of respiration in

rabbit
humans
lizard
frog

109. The carbon dioxide is transported via blood to lungs as

in combination with haemoglobin only
dissolved in blood plasma
carbaminohaemoglobin and as carbonic acid
in the form of carbonic acid only

110. Although much CO2 is carried in blood, yet blood does not become acidic, because

it combines with water to form which is neutralized by NaCO3
it is absorbed by the leucocytes
it is continuously diffused through tissues and is not allowed to accumulate
blood buffers play an important role in CO2 transport.

111. Air is breathed through

Nostrils — pharynx — larynx — trachea — bronchi — bronchioles — alveoli
Trachea — lungs — larynx — pharynx — alveoli
Nose — mouth — lungs
Nose — larynx — pharynx — bronchus — alveoli — bronchioles

112. Oxygen dissociation curve of haemoglobin is

Linear
Sigmoid
Hypobolic
Hyperbolic

113. inhaling polluted air containing unusually high content of

carbon dioxide
carbon disulphide
carbon monoxide
chloroform

114. When CO2 concentration in blood increases, breathing becomes

slow and deep
shallower and slow
faster and deeper
there is no effect on breathing

115. Which of the following are the correct statement for respiration in human

Workers in grinding and stone - breaking industries may suffer from lung fibrosis
Cigarette smoking may lead of inflammation of bronchi
About 90% of carbon dioxide (CO2) is carried by haemoglobin as carbamino haemoglobin.
Neural signals from pneumotaxic centre in pons region of brain can increase the duration of inspiration

116. Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?

One can consiously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all.
One can breathe out air totally without oxygen.
The lungs can be made fully empty by forcefully breathing out all air from them
One can breathe out air through eustachian tubes by closing both the nose and the mouth.

117. Child death may occur in the marriage between

Rh– man and Rh– woman
Rh+ man and Rh+ woman
Rh– man and Rh+ woman
Rh+ man and Rh– woman

118. Which of the following statments is true for lymph?

RBCs, WBCs and plasma
WBC and serum
RBCs proteins and platelets
all components of blood except RBCs and some proteins

119. Impulse of heart beat originates from

Vagus nerve
S. A. node
Cardiac nerve
A. V. node

120. What is correct for blood group ‘O’?

Antigen and antibody both absent
No antigens but both a and b antibodies are present
A and B antigens and a, b antibodies
A antigen and b antibody

121. Sickle cell anaemia is induced by

change of amino acid in both a- and b-chain of haemoglobin
change of amino acid in a-chain of haemoglobin
change of amino acid in either a- or b-chain of haemoglobin
change of amino acid in b-chain of haemoglobin

122. As the age advances, there is a gradual thinning of hair in human males. This is mainly because of lowered

synthesis of glycogen
blood supply
availability of energy
synthesis of proteins

123. In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be

124. Bundle of His is a network of

muscle fibres found only in the ventricle wall
nerve fibres found throughout the heart
Muscle fibers distributed throughout the heart walls
nerve fibres distributed in ventricles

125. Which one of the following statements is incorrect?

The principle of countercurrent flow facilitates efficient respiration in gills of fishes
The presence of non-respiratory air sacs, increases the efficiency of respiration in birds
The residual area in lungs slightly decreases the efficiency of respiration in mammals
In insects, circulating body fluids serve to distribute oxygen to tissues

126. Damage to thymus in a child may lead to

loss of antibody mediated immunity
a reduction in haemoglobin content of blood
loss of cell mediated immunity
a reduction in stem cell production

127. In humans, blood passes from the post caval to the diastolic right atrium of heart due to.

stimulation of the sino auricular node
pushing open of the venous valves
pressure difference between the post caval and atrium
suction pull

128. The most active phagocytic white blood cells are:

lymphocytes and macrophages
neutrophils and monocytes
neutrophils and eosinophils
eosinophils and lymphocytes

129. Which type of white blood cells are concerned with the release of histamine and the natural anti- coagulant heparin?

Eosinophils
Neutrophils
Monocytes
Basophils

130. What is true about RBCs in humans?

They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma
They carry about 20–25 per cent of CO2
They do not carry CO2 at all
They transport 99.5 per cent of O2

131. Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as

70% carbamino- haemoglobin and 30% as bicarbonate
bicarbonate in blood plasma and RBCs
carbamino-haemoglobin in RBCs
free CO2 in blood plasma

132. Given below is the ECG of a normal human. Which one of its components in human is correctly interpreted below

Peak P and Peak R together-Systolic and diastolic blood pressures
Complex QRS-One complete Pulse
Peak P- Initiation of left atrial contraction only
Peak T - Initiation of total cardiac contraction

133. Which one of the following statements is correct regarding blood pressure?

105/50 mm Hg makes one very active
130/90 mmHg is considered high and requires treatment
90/110 mmHg may harm vital organs like brain and kidney
100/55 mmHg is considered an ideal blood pressure

134. Arteries are best defined as the vessels which:

break up into capillaries which reunite to form a vein
supply oxygenated blood to the different organs
carry blood from one visceral organ to another visceral organ
break up into capillaries which reunite to form one visceral organ

135. Which one of the following plasma proteins is involved in the coagulation of blood?

a globulin
an albumin
fibrinogen
serum amylase

136. Consider the following four statements (a-d) about certain desert animals such as kangaroo, rat.

They feed on dry seeds and do not require drinking water
They have dark colour and high rate of reproduction and excrete solid urine
They excrete very concentrated urine and do not use water to regulate body temperature Which two of the above statements for such animals are true?
They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs

137. Lysozyme that is present in perspiration, saliva and tears, destroys

most virus-infected cells
certain types of bacteria
certain fungi
all viruses

138. Bowman’s glands are located in the

olfactory epithelium of our nose
anterior pituitary
proximal end of uriniferous tubules.
female re productive system of cockroach

139. In Ornithine cycle, which of the following wastes are removed from the blood?

CO2 and ammonia
CO2 and urea
Urea and urine
Ammonia and urea

140. The principal nitrogenous excretory compound in humans is synthesised

in liver and also eliminated by the same through bile
in kidneys but eliminated mostly through liver
in the liver, but eliminated mostly through kidneys
in kidneys as well as eliminated by kidneys

141. Which one of the following statements in regard to the excretion by the human kidneys is correct?

Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules
Descending limb of Loop of Henle is impermeable to water
Ascending limb of Loop of Henle is impermeable to electrolytes
Distal convoluted tubule is incapable of reabsorbing HCO3

142. Which one of the following correctly explains the function of a specific part of a human nephron?

Distal convoluted tubule: reabsorption of K+ ions into the surrounding blood capillaries
Podocytes: create minute spaces (slite pores) for the filtration of blood into the Bowman’s capsule
Afferent arteriole: carries the blood away from the glomerular towards renal vein.
Henle’s loop: most reabsorption of the major substances from the glomerular filtrate

143. A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This O2

is enough to keep oxyhaemoglobin saturation at 96%
acts as a reserve during muscular exercise
helps in releasing more O2 to the epithelial tissues.
raise the pCO2 of blood to 75 mm of Hg.

144. Which one of the following is not a part of a renal pelvis?

Collecting ducts
Peritubular capillaries
Loops of Henle
Convoluted tubules

145. Which one of the following characteristics is common to both in humans and adult frogs?

Nucleated RBCs
Four - chambered heart
Ureotelic mode of excretion
Internal fertilization

146. A fall in glomerular filtration rate (GFR) activates

juxta - glomerular cells to release renin.
adrenal cortex to release aldosterone.
posterior pituitary to release vasopressin
adrenal medulla to release adrenaline.

147. Ureters act as urogenital ducts in

frog's both males and females
human males
frog's males
human females

148. The characteristics and an example of a synovial joint in humans is: Characteristics Examples

Lymph filled between gliding joint two bones, limited between movement carpals
Fluid filled between Skull bones two joints, provides cushion
Fluid cartilage Knee joint between two bones, limited movements
Fluid filled synovial Joint between cavity between two atlas and axis bones

149. Which one of the following pairs of chemical substances is correctly categorized?

Troponin and myosin - Complex proteins in striated muscles
Calcitonin and thymosin - Thyroid hormones
Secretin and rhodopsin - Polypeptide hormones
Pepsin and prolactin - Two digestive enzymes secreted in stomach

150. Which of the following is an example of negative feedback loop in humans?

Secretion of sweat glands and constriction of skin blood vessels when it is too hot
Secretion of tears after falling of sand particles into the eye.
Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
Salivation of mouth at the sight of delicious food

151. One of the examples of the action of the autonomous nervous system is

peristalsis of the intestine
swallowing of food
knee-jerk response
pupillary reflex

152. In a man, abducens nerve is injured. Which one of the following functions will be affected?

Swallowing
Movement of the eye ball
Movement of the neck
Movement of the tongue

153. Alzheimer disease in humans is associated with the deficiency of:

gamma aminobutyric acid (GABA)
glutamic acid
dopamine
acetylcholine

154. Cornea transplant in humans is almost never rejected. This is because

it has no blood supply
it is composed of enucleated cells
its cells are least penetrable by bacteria
it is a non-living layer

155. During the propagation of a nerve impulse, the action potential results from the movement of:

K+ ions from intracellular fluid to extracellular fluid
K+ ions from extracellular fluid to intracellular fluid
Na+ ions from extracellular fluid to intracellular fluid
Na+ ions from intracellular fluid to extracellular fluid

156. Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina? Rod Cells Cone Cells

Overall: Vision in Colour function poor light vision and detailed vision in bright light
Visual: High Low acuity
Distribu- More conc- Evenly tion: entrated in distributed retina all over
Visual: Iodopsin Rhodpsin pigment contained

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