NEET Practice Questions

Exam Duration: 180 Mins Total Questions : 180

1 )

Select the wrong statement.

(a)
Anisogametes differ either in Structure, function or behaviour
(b)
In omycetes female gamete is smaller and motile, while male gamete is larger and non-motile
(c)
Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy
(d)
Isogametes are similar in structure, function and behaviour

2 )

Chloragogen cells of earthworm are similar to---- vertebrate organ.

(a)
spleen
(b)
liver
(c)
kidney
(d)
lung

3 )

The characteristic fruit of Brassica, family-Cruciferae is

(a)
follicle
(b)
siliqua
(c)
capsule
(d)
carcervulus

4 )

The water potential of an aqueous solution is

(a)
zero
(b)
more than one
(c)
less than one
(d)
infinite

5 )

The cell A has an osmotic potential of -20 bars and a pressure potential of +6 bars. what will be its water potential?

(a)
-14 bars
(b)
+14 bars
(c)
-20 bars
(d)
+20 bars

6 )

Aeroponics is also called as

(a)
soilless cultivation of plants
(b)
parthenocarpy
(c)
vivipary
(d)
phytotron

7 )

An insectivorous plant has rosette of prostrate leaves with winged petiole. The lamina consists of two round halves having teeth like margins deviced for catching prey. It is named as

(a)
Drosera
(b)
Utricularia
(c)
Nepenthes
(d)
Dionaea

8 )

chlorophyll in chloroplasts is located in

(a)
outer membrane
(b)
inner membrane
(c)
thylakoids
(d)
stroma

9 )

Maximum growth occurs during

(a)
stationary phase
(b)
lag phase
(c)
exponential phase
(d)
senescent phase

10 )

Which one of the following statements is correct?

(a)
Neurons regulate endocrine activity ,but not vice versa
(b)
endocrine glands regulate neural activity and nervous system regulates endocrine glands
(c)
Neither hormones control neural activity nor the neurons control endocrine activity
(d)
endocrine glands regulate neural activity but not vice-versa

11 )

The number of linkage groups in Drosophila, Pisum, corn and mice are

(a)
4, 7, 10 and 19 respectively
(b)
4, 7, 19 and 20 respectively
(c)
4, 7, 10 and 20 respectively
(d)
10, 12, 17 and 20 respectively

12 )

A population will not exist in Hardy-Weinberg equilibrium if

(a)
individuals mate selectively
(b)
there are no mutations
(c)
there is no migration
(d)
the population is large

13 )

Approximately what amount of energy is available to one trophic level from one lower to it?

(a)
1%
(b)
10%
(c)
20%
(d)
30%

14 )

Increment borer is an instrument used to count

(a)
the number of xylem vessels of early wood
(b)
the number of annual rings
(c)
the number of cambium rings
(d)
the number of tyloses in each vessel

15 )

Few-seeded, shortened, broadened and flattened siliqua fruits are those of

(a)
Brassica rapa (turnip)
(b)
Brassica campestris (mustard)
(c)
Raphanus sativus (radish)
(d)
Iberis amara (candytuft)

16 )

In which pair both the plants can be vegetatively propagated by leaf pieces?

(a)
Bryophyllum and Kalanchoe
(b)
Chrysanthemum and Agave
(c)
Agave and Kolanchoe
(d)
Asparagus and Bryophyllum

17 )

Protein synthesis takes place in

(a)
ribosomes
(b)
chloroplasts
(c)
mitochondria
(d)
Golgi bodies

18 )

What is true about ribosomes?

(a)
The prokaryotic ribosomes are 80 S, where S stands for sedimentation coefficient
(b)
These are composed of ribonucleic acid and proteins
(c)
These are found only in eukaryotic cells
(d)
These are self-splicing introns of some RNSs

19 )

Monosaccharide have carbons

(a)
20
(b)
10 - 15
(c)
2 - 10
(d)
3 - 7

20 )

Multinucleate decomposer organism is

(a)
Physarum
(b)
Pelomyxa
(c)
Arcella
(d)
Dictyostelium

21 )

In transpiration

(a)
upward movement of water by roots will stop
(b)
turgidity of the cell will be lost
(c)
all metabolic processes will stop
(d)
upward movement of water by roots will continue and all the metabolic processes will occurs as usual

22 )

The most important function of diaphragm of the mammals is to

(a)
divide the body cavity into compartment
(b)
protect lungs
(c)
aid in respiration
(d)
aid in ventilation

23 )

Layer of cells that secrete enamel of tooth is

(a)
osteoblast
(b)
ameloblast
(c)
odontoblast
(d)
dentoblast

24 )

In a fully turgid cell, ...........................is zero.

(a)
OP
(b)
TP
(c)
WP
(d)
DPD

25 )

Photophosphorylation differs from oxidative phosphorylation in requiring input of energy in the form of

(a)
light
(b)
heat
(c)
AMP
(d)
NAD

26 )

If a person takes iodine then it will be stored in

(a)
thyroid
(b)
liver cells
(c)
brain cells
(d)
pancreas

27 )

In photosynthesis, action and absorption spectrum are related by

(a)
von Helmontz
(b)
Engelmann
(c)
Emerson
(d)
Lavosier

28 )

Nervous system is first formed in

(a)
Platyhelminthes
(b)
cnidarians
(c)
annelids
(d)
sponges

29 )

Glass sponges belong to the class

(a)
Demospongia
(b)
Tetractinellida
(c)
Hexactinellida
(d)
Calcarea

30 )

Classification of sponge is based on

(a)
locomotory organs
(b)
skeleton
(c)
size
(d)
numbers of ostia

31 )

The function of the trichocysts are

(a)
offence and defence
(b)
naroctising prey
(c)
to attain resting condition
(d)
All of the above

32 )

Funaria is

(a)
heteroecious
(b)
dioecious
(c)
monoecious
(d)
trioecious

33 )

Among rust, smut and mushroom all the three

(a)
are pathogens
(b)
are saprobes
(c)
bear ascocarps
(d)
bear basidiocarps

34 )

Eutherian mammals are characterised by

(a)
ovoviviparity
(b)
hairy skin
(c)
true placentation
(d)
glandular skin

35 )

The outer covering of cartilage is called

(a)
peritoneum
(b)
periosteum
(c)
endosteum
(d)
perichondrium

36 )

viruses that infect bacteria multiply and cause thier lysis, are called

(a)
lysozymes
(b)
lipolytic
(c)
lytic
(d)
lysogenic

37 )

Palmately compound leaves are found in

(a)
neem
(b)
banana
(c)
silk cotton
(d)
tamarind

38 )

Longitudinal channels of bone are called

(a)
Haversian canal
(b)
Volkmann's canals
(c)
Narrow cavity
(d)
Lacunae

39 )

Boron takes part in

(a)
Photosynthesis
(b)
Activation of enzymes involved in respiration
(c)
transport of carbohydrates through phloem
(d)
Nitrogen metabolism

40 )

Vernalisation stimulates flowering in

(a)
zamikand
(b)
turmeric
(c)
carrot
(d)
ginger

41 )

In mammals, which blood vessel would normally carry largest amount of urea?

(a)
Hepatic vein
(b)
Hepatic portal vein
(c)
Renal vein
(d)
Dorsal aorta

42 )

Which of the following region(s) of the nephron permeable to water but almost impermeable to electrolytes?

(a)
Descending limb of loop of Henle
(b)
Ascending limb of loop of Henle
(c)
Proximal convoluted tubule
(d)
Distal convoluted tubule

43 )

Decreased levels of oestrogen leads to

(a)
arthritis
(b)
osteoporosis
(c)
tetany
(d)
gout

44 )

During cell cycle DNA replicates

(a)
once
(b)
twice
(c)
many times
(d)
not at all

45 )

Common cold is not cured by antibiotics because it is

(a)
caused by a virus
(b)
caused by a Gram positive bacterium
(c)
caused by a Gram Negative bacterium
(d)
none of the above

46 )

A plant hormone used for inducing morphogenesis in plant tissue culture is

(a)
Cytokinins
(b)
Ethylene
(c)
Abscisic acid
(d)
Gibberellins

47 )

Trichoderma Polyspoium is a source of

(a)
cyclosporine A
(b)
streptokinase
(c)
statins
(d)
clot buster

48 )

Glomus as a biofertilizer is

(a)
free living N2 fixing bacteria
(b)
symbiotic bacteria
(c)
cyanobacteria
(d)
mycorrhiza

49 )

Gel electrophoresis is used for

(a)
Cutting DNA into fragments
(b)
Separation of DNA fragments according to their size
(c)
Construction of recombinant DNA by joining with cloning vectors
(d)
Isolation of DNA molecules

50 )

The branch of science dealing with classification, identification and naming of organisms is called

(a)
anatomy
(b)
systematics
(c)
physiology
(d)
cytology

51 )

Which one of the following is a freshwater sponge?

(a)
Sycon
(b)
Spongilla
(c)
Euspongia
(d)
Euplectella

52 )

The given diagram shows microsporangium of a mature anther. Identify A, B and C.

(a)
A-Middle layer, B-Endothecium, C-Tapetum
(b)
A-Endothecium, B-Tapetum, C- Middle layer
(c)
A-Endothecium, B-Middle layer, C-Tapetum
(d)
A-Tapetum, B-Middle layer, C-Endothecium

53 )

Methyl guanosine triphosphate is added to the 5' end of hnRNA in a process of

(a)
splicing
(b)
capping
(c)
tailing
(d)
none of these

54 )

Match column I with column II and select the correct option from the given codes.

Column I	Column II
A. Sigma factor	(i) 5' - 3'
B. Capping	(ii) Initiation
C. Tailing	(iii) Termination
D. Coding strand	(iv) 5' end
	(v) 3' end

(a)
A-(iii), B-(v), C-(iv), D-(ii)
(b)
A-(ii), B-(iv), C-(v), D-(i)
(c)
A-(ii), B-(iv), C-(v), D-(iii)
(d)
A-(iii), B-(v), C-(iv), D-(i)

55 )

Given below are four statements (i)-(iv) regarding embryonic development in humans.
(i) Cleavage divisions bring about considerable increase in the mass of protoplasm.
(ii) With more cleavage divisions, the resultant blastomeres become smaller and smaller.
(iii) The blastomeres in the blastocyst are arranged into two layers, trophoblast and endometrium.
(iv) Cleavage divisions result in a solid ball of cells called morula.
Which of the above two statements are correct?

(a)
(i) and (iii)
(b)
(ii) and (iv)
(c)
(i) and (ii)
(d)
(iii) and (iv)

56 )

Which of these is a condition that makes flowers invariably autogamous?

(a)
Dioecy
(b)
Self incompatibility
(c)
Cleistogamy
(d)
Xenogamy

57 )

Which of the following statements are correct?
(i) India's first test tube baby's name is Kum Harsha.
(ii) Inability to conceive or produce children even after 2 years of unprotected sexual cohabitation is called infertility.
(iii) Surgical method of contraception prevents gamete formation.
(iv) MTPs are relatively safe up to 12 weeks of pregnancy.

(a)
(i), (ii) and (iv)
(b)
(ii), (iii) and (iv)
(c)
(iii) and (iv)
(d)
(i) and (iii)

58 )

Identify the labels A, B, C and D in the given structure of tRNA and select the correct option.

(a)

A B C D

Anticodon loop T\(\Psi \)loop AA binding site DHU loop
(b)

A B C D

AA binding site T \(\Psi \)loop Anticodon loop DHU loo
(c)

A B C D

AA binding site DHU loop Anticodon loop T \(\Psi \)loop
(d)

A B C D

AA binding site DHU loop T \(\Psi \)loop Anticodon loop

59 )

In human adult females, oxytocin

(a)
stimulates pituitary to secrete vasopressin
(b)
causes strong uterine contractions during parturition
(c)
is secreted by anterior pituitary
(d)
stimulates growth of mammary glands.

60 )

'Golden rice' developed through transgene approach is enriched with

(a)
high lysine content
(b)
high methionine content
(c)
high glutenin content
(d)
high vitamin A content

61 )

Readthe given statements and select the correct option.
Statement 1 : Reforestation is the process of restoring a forest that once existed but was removed at some point of time in the past.
Statement 2 : Reforestation may occur naturally in a deforested' area, however it can be speeded up by planting trees with due consideration to biodiversity that earlier existed in that area.

(a)
Both statements 1 and 2 are correct.
(b)
Statement 1 is correct but statement 2 is incorrect.
(c)
Statement 1 is incorrect but statement 2 is correct.
(d)
Both statements 1 and 2 are incorrect.

62 )

Amrita Devi Bishnoi Wildlife Protection Award is for the individuals or communities from rural areas that have shown extraordinary courage in

(a)
reducing environmental pollution
(b)
reducing global warming
(c)
protecting wildlife
(d)
reforestation in deforested area.

63 )

Simple cuboidal epithelium lines all the following structures except the

(a)
ovary
(b)
pancreatic ducts
(c)
thyroid follicles
(d)
Fallopian tube.

64 )

In which one of the following pairs, two terms represent the same thing?

(a)
Lymphocyte - erythrocyte
(b)
Plasma - serum
(c)
Mitral valve - bicuspid valve
(d)
Atrioventricular node - pacemaker

65 )

A farmer while growing grape plants in his garden, observes the following:
(i) Fruit size normally remained small.
(ii) Natural seed abortion.
(iii) Reduced stem and leaf growth.
Which problems could be solved by application of gibberellic acid during the development of fruits?

(a)
(i) and (ii)
(b)
(i) and (iii)
(c)
(i), (ii) and (iii)
(d)
None of these

66 )

In the following question, a statement of assertion is followed by a statement of reason.
Mark the correct choice as :
Assertion: In some plants flowering depends only on a combination of light and dark exposure.
Reason: The site of perception of light or dark duration are the shoot apices of plants.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion.
(c)
If assertion is true but reason is false
(d)
If both assertion and reason are false.

67 )

Acromion process is characteristically found in _____ the of mammals.

(a)
pectoral girdle
(b)
sperm
(c)
pelvic girdle
(d)
skull

68 )

In apoplast pathway, water moves exclusively through the

(a)
plasmodesmata
(b)
cell walls
(c)
intercellular spaces
(d)
both (b) and (c).

69 )

Which one of the following options is incorrect?

(a)
Hinge joint - between humerus and pectoral girdle
(b)
Pivot joint - between atlas, axis and occipital condyle
(c)
Gliding joint - between the carpals
(d)
Saddle joint - between carpal and metacarpals of thumb

70 )

Assertion: Sporozoans may have silica shells on their surface.
Reason: Shells of sporozoans help in protection from acidic environment of the host.

(a)
If both assertion and reason are true and reason is the correct explanation of assertion.
(b)
If both assertion and reason are true but reason is not the correct explanation of assertion.
(c)
If assertion is true but reason is false.
(d)
If both assertion and reason are false.

71 )

Which of the following statements regarding small intestine are incorrect?
(i) Throughout the small intestine, there are crypts of Lieberkuhn at the base of the villi.
(ii) In duodenum, there are, in addition, small rounded peptic glands.
(iii) The small intestine is strongly self-protective, by means of a copious production of mucus and a mechanism for the rapid replacement of cells damaged by contact with food and digestive juices.
(iv) Each villus is richly supplied with blood capillaries only.

(a)
(i) and (iv)
(b)
(ii) and (iv)
(c)
(iii) and (iv)
(d)
(i) and (ii)

72 )

Select the incorrect pair.

(a)
Numerical taxonomy - All observable characteristics
(b)
Cytotaxonomy - Cytological information
(c)
Chemotaxonomy - Chromosome number and structure.
(d)
Cladistic taxonomy - Origin from a common ancestor

73 )

Which of the following is a non-symbiotic nitrogen fixing prokaryote?

(a)
Azotobacter
(b)
Clostridium
(c)
Beijerinckia
(d)
All of these

74 )

Read the given statements and select the correct option.
Statement 1 : Bryophytes are amphibians of plant kingdom.
Statement 2 : They live in soil but depend on water for sexual reproduction.

(a)
Both statements 1 and 2 are correct.
(b)
Statement 1 is correct but statement 2 is incorrect
(c)
Statement 1 is incorrect but statement 2 is correct
(d)
Both statements 1 and 2 are incorrect.

75 )

First fermented acid is

(a)
Gluconic acid
(b)
Lactic acid
(c)
Fumaric acid
(d)
All the above

76 )

Which of the following base pair is wrong?

(a)
A-T
(b)
G-C
(c)
A-C
(d)
A-U

77 )

The common nitrogen -fixer in paddy fields is:

(a)
Frankia
(b)
Rhizobium
(c)
Azospirillum
(d)
Oscillatoria

78 )

The plasma membrane of the muscle fibre is called

(a)
Sarcoplasma
(b)
Sarcolemma
(c)
Sarcoplasmic Reticulum
(d)
Syncytial

79 )

Which of the following is not a natural method of contraception?

(a)
Periodic abstinence
(b)
Withdrawal method
(c)
Lactational amenorrhoea
(d)
Condoms

80 )

Disadvantage of using porcine insulin in diabetic patients is

(a)
That it may lead to hypercalcemia
(b)
It may cause allergic reactions
(c)
It is expensive
(d)
It can lead to mutations in adult

81 )

Diffusion membrane is made up of which of the following layers?

(a)
Thin squamous epithelium of alveoli
(b)
Basement membrane
(c)
Endothelium of alveolar capillaries
(d)
All of these

82 )

Carbon dioxide is carried in the blood, mainly as

(a)
Sodium bicarbonate
(b)
Potassium bicarbonate
(c)
Carbamino-haemoglobin
(d)
Dissolved gas in plasma

83 )

Sliding filament theory can be best explained as

(a)
when myofilaments slide pass each other, Myosin filament do not shorten
(b)
when myofilaments slide pass each other, Actin filament shorten, while Myosin filament do not shorten
(c)
Actin and Myosin filaments shorten and slide pass each other
(d)
Actin and Myosin filaments do not shorten but rather slide pass each other

84 )

A moderately active person requires energy per day

(a)
2000 kcal
(b)
100 kcal
(c)
750 kcal
(d)
2800 kcal

85 )

Choose correct option w.r.t. origin of cork cambium in dicot stem and root

(a)
Completely primary in both
(b)
Completely secondary in both
(c)
Partly primary and partly secondary in both
(d)
Primary in stem and secondary in root

86 )

In lac-operon, \(\beta\)-galactosidase enzyme is made by

(a)
lac-y
(b)
lac-a
(c)
lac-z
(d)
lac-i

87 )

Skin colour in man is controlled by

(a)
Three pairs of polygenes
(b)
Duplicate genes
(c)
Six pairs of polygenes
(d)
Supplementary genes

88 )

In antiport,

(a)
Two molecules are transported in same direction across the membrane
(b)
Only one molecule is transported across the membrane
(c)
Two molecules are moved in opposite directions across the membrane
(d)
No transport occurs

89 )

The water rises in straw due to suction, it is due to

(a)
Positive hydrostatic pressure
(b)
Negative hydrostatic pressure
(c)
Zero hydrostatic pressure
(d)
Diffusion pressure

90 )

Which of the following has the highest genetic diversity in India

(a)
Rice
(b)
Mango
(c)
Wheat
(d)
Maize

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