Full Syllabus Biology - 03 (NEET/AIIMS Online Practice Exam)
MCQ
Entrance level questions
The highly resistant nature of bacterial endospores is due to thick wall and presence of chemical called
murein
dipicolinic acid
bacteriocin
mycolic acid.
---A--- are found at maximum depth of sea where no other photosynthetic organisms grow as they are able to absorb the short ---B--wavelengths of light.
A - Bryophytes, B - blue
A - Chlorophytes, B - red
A - Rhodophytes, B - blue green
A - Phaeophytes, B - blue
Earthworm is structurally more advanced over roundworms. This can be explained by the presence of:-
metameric segmentation
true coelom
setae
all of these
Membrane bound crystalline structures called woronin bodies:-
completely plug the simple septal pores that allow movement of substances between cells
are unicisternal and are found in chitosomes
are found in fungi belonging to classes Ascomycetes and Deuteromycetes
are present in membranous vesicle lomasome, attached to plasma membrane.
In Mendelian dihybrid cross, when heterozygous round yellow are self crossed, round green offsprings are represented by the genotype
RrYy, RrYY, RRYy
Rryy, RRyy, rryy
rrYy, RrYY
Rryy, RRyy.
Identify the given structure and select the correct option.
Adenosine
Guaninosine 5-monophosphate
Adenylic acid
Cytidine
If a recombinant DNA carrying antibiotic resistance gene (e.g., tetracycline) is transferred into an E.coli cell, then the host cell is transformed into tetracycline resistant cell. The tetracycline resistant gene in this case is called as
cloning site
selectable marker
vector
recombinant protein.
What will happen to the population of Yucca plants if the population of moths in that area decreases?
The population of Yucca plants will increase.
The population of Yucca plants will decrease
The population of Yucca plants will remains same.
The population of Yucca plants will first increase and then decrease.
The minute pores through which water enters in the body cavity of sponges is
osculum
spongocoel
ostia
choanocytes.
Cyclosporin A helps in the
flavouring of soft drinks
lowering blood cholesterol level
inhibiting the activation of T-cells
degumming of silk
Arrange the given steps of respiration in correct sequence. P. Transport of gases by the blood Q. Utilisation of oxygen R. Pulmonary ventilation S. Diffusion of 02 and C02between blood and tissues T. Diffusion of 02 and C02 between blood and tissues across alveolar
P → R → Q → S →T
T → P → S → R → Q
R → T → P →S → Q
S → R → P → T → Q
Consider the following statements and select the correct set of statements. I. Cycas is a monoecious plant with both male and female cones borne on the same plant. II. Pinus bears needle-like leaves that help them conserve water and remain evergreen. III. Pinus bears coralloid roots having symbiotic association with blue green algae. IV. Cycas bears two types of leaves - large green foliage and small brownish scale leaves.>
I and III only
II and IV only
I, II and IV only
III and IV only
What is the function of mucus and bicarbonates present in the gastric juice?
They provide acidic pH optimal for action of pepsin.
They help in thorough mixing up of the food in the intestine.
They lubricate and protect the mucosal epithelium from excoriation by HCI
They activate enzymes of pancreatic juice.
Which of the following statements is correct?
During inspiration, external intercostal muscles and diaphragm contract.
Volume of air remaining in the lungs even after a forcible expiration is called expiratory reserve volume.
Partial pressure of oxygen in deoxygenated blood is 104 mm Hg.
Emphysema is a difficulty in breathing due to inflammation of bronchi and bronchioles.
Read the following statements and select the incorrect one.
Rosie, a transgenic cow, produced milk containing α-1 -antitrypsin.
Human protein α -1-antitrypsin is used to treat emphysema.
In children, ADA deficiency can be cured by bone marrow transplantation.
Insulin, used for diabetes, was earlier extracted from the pancreas of cattle and pigs.
cryIAc and cryIIAb encode the protein which controls
corn borers
cotton boll worms
tobacco budworms
armyworms.
Which of the following groups contain false fruits?
Apple, strawberry and cashew
Apple, strawberry and banana
Cashew, guava and orange
Guava, orange and mango
RQ (respiratory quotient) is
Volume of C02 evolved = Volume of 02 consumed
Volume of 02 consumed / Volume of C02 evolved
Volume of C02evolved / Volume of 02consumed
Volume of 02 evolved / Volume of CO, consumed
The first vascular plants dominated the land because of the presence of
mechanical tissues
deep, penetrating and wide spreading roots
vascular tissues for long distance transport system
all of these.
Identify the organism from the given characteristics. (i) Presence of notochord in tail of larva (ii) Dorsal tubular nerve cord is replaced by dorsal ganglion in adult stage (iii) Shows retrogressive metamorphosis
Rhabdopleura
Doliolum
Petromyzon
Branchiostoma
Match the column:-
Column - I
Column - II
A
Filopodial locomotion
1
Actinophrys
B
Axopodial locomotion
2
Paramecium
C
Reticulopodial locomotion
3
Euglypha
D
Ciliary locomotion
4
Globigernia
A-3, B-1, C-4, D-2
A-2, B-3, C-1, D-4
A-3, B-4, C-2, D-1
A-4, B-2, C-3, D-1
Select the correct statement regarding prions
These are infectious agents made up of highly resistant glycolipid particles.
These are formed by mutation in gene PRNP
They accumulate in muscular tissue and cause its degeneration.
They get affected by enzymes, high temperature and UV radiations.
Endosperm is formed during the double fertilisation by the fusion of
two polar nuclei and one male gamete
one polar nucleus and one male gamete
ovum and male gamete
two polar nuclei and two male gametes.
In a pond, Daphnia is preyed upon by prawn. Here, prawn and Daphnia are respectively
tertiary consumer and secondary consumer
primary consumer and primary producer
secondary consumer and primary consumer
primary consumer and secondary consumer.
Which of the following is not a key feature of telophase of mitosis?
Attachment of spindle fibres to kinetochore of chromosomes
Clustering of chromosomes at opposite spindle poles resulting in loss of their identity as discrete elements
Nuclear envelope assembles around the chromosome clusters
Reformation of endoplasmic reticulum
Which of the following statements is correct?
Mitochondria contain circular DNA, but chloroplasts have linear DNA.
Chloroplasts contain circular DNA, but mitochondria lack it.
Neither mitochondria nor chloroplasts contain any DNA.
Both mitochondria and chloroplasts contain circular DNA.
An angiospermic plant has 24 chromosomes in 'microspore mother cell'. The number of chromosomes in its endosperm will be
12
36
24
48
In dihybrid crosses the F1 heterozygous plants are self fertilised to produce F2 generation and if offsprings are computed in Punnett square the phenotypic F2 ratio as per Mendel's independent assortment will yield
9:7
9:3:3:1
9:6:1
12:3:1.
Gases used in Miller and Urey's experiment to produce complex organic compounds were
oxygen, ammonia, methane and water
hydrogen, ammonia, methane and water vapour
hydrogen, ammonia, ethane and water vapour
hydrogen, oxygen, nitrogen and water.
Identify A, B, C and D in the given table and select the correct option.
Crop
Variety
Resistance to disease
A
Himgiri
Leaf & stripe rust
Brassica
B
White rust
C
Pusa Komal
Bacterial blight
Cauliflower
Pusa Shubhra
D
A - Wheat , B - Pusa Swarnim , C - Cowpea, D - Black rot
A - Chilli , B - Pusa Sadabahar , C - Cowpea, D - Tobacco mosaic virus
A - Wheat , B - Pusa Sadabahar , C - Chilli , D - Hill bunt
A - Cowpea , B - Pusa Swarnim , C - Chilli , D - Leaf curl
The movement of electrons in ETC in PS II is
downhill in terms of redox potential scale
uphill in terms of redox potential scale
downhill in terms of oxidation reaction
uphill in terms of reduction reaction.
Two adjacent cells A and B are being studied. Cell A has solute potential -10 bars and pressure potential 2 bars. Cell B has solute potential -20 bars and pressure potential 6 bars. What will be the direction of movement of water?
Water will move from cell A to B.
Water will move from cell B to A.
Water will move in both directions.
There will be no movement of water.
During which substage of prophase-l of meiosis, are bivalents formed?
Pachytene
Leptotene
Diplotene
Zygotene
Which of the following organelles is common in both plants and animals?
Mitochondrion
Chloroplast
Lysosomes
Contractile vacuole
The coding strand of DNA has the following sequence: -ACGTAC- What will be the sequence of mRNA?
UGCAUG
ACGUAC
ACGTAC
TGCATG
Study the given flow chart carefully and select the correct option for A, B, C and D.
A - Agnatha , B - Gnathostomata , C - Tetrapoda , D - Cyclostomata
A - Cyclostomata , B - Gnathostomata , C - Tetrapoda , D - Agnatha
A - Agnatha , B - Tetrapoda , C - Cyclostomata , D - Gnathostomata
A - Cyclostomata , B - Tetrapoda , C - Placodermi , D - Agnatha
The stalk which joins ovule to placenta is called
hilum
funicle
micropyle
chalaza
Which of the following essential elements is a constituent of the ring structure of chlorophyll?
Fe
S
Mn
Mg
Which of the following differences between red and white muscle fibres is incorrect?
Option
Red Muscle fibres
White Muscle fibres
(a)
High myoglobin content
Low myoglobin content
(b)
Few Mitochondria
Numerous Mitochondria
(c)
Depends on aerobic process for energy
Depends on anaerobic process for energy
(d)
Less amount of sarcoplasmic reticulum
High amount of sarcoplasmic reticulum
a
b
c
d
Which of the following is incorrect regarding the action of hormonal contraceptive pills?
Inhibition of spermiation
Inhibition of release of egg from ovary
Changes in cervical mucus impairing its ability to allow passage and transport of sperms
Alteration in uterine endometrium to make it unsuitable for implantation
Pectic compounds of middle lamella and polysaccharides of cell wall are secreted by
endoplasmic reticulum
plasma membrane
Golgi complex
sphaerosomes.
Which of the following statements are correct regarding the mass flow hypothesis? (i) Sugar is transported through phloem in the form of sucrose. (ii) The process of loading at the source produces a hypotonic condition in the phloem. (iii) At the sink, the osmotic pressure must be highest. (iv) Water from the adjacent xylem moves into phloem by osmosis.
(i) and (ii) only
(i) and (iii) only
(i), (ii) and (iv) only
(i) and (iv) only
Fertilisation is defined as the process by which
a diploid spermatozoan unites with a haploid ovum to form a triploid zygote
a haploid spermatozoan unites with a haploid ovum to form a diploid zygote
a diploid spermatozoan unites with a diploid ovum to form a diploid zygote
a haploid spermatozoan unites with a haploid ovum to form a haploid zygote.
Which of the following hormones is synthesised by the hypothalamus and is transported axonally to neuro-hypophysis?
Melanocyte stimulating hormone
Prolactin
FSH
Oxytocin
Select the incorrect statement from the following.
Tubular reabsorption takes place by passive and active transport.
ADH decreases the reabsorption of water in the DCT and collecting duct.
Renin stimulates the glomerular blood flow thereby causing the GFR back to normal.
On an average, a normal adult secretes about 1.5 litres of urine in 24 hours.
Study the given table carefully and identify A, B, C and D.
Family
Inflorescence
Flower
Stamen
Gynoecium
Fabaceae
A
Zygomorphic
10
D
Solanaceae
Solitary or Cymose
B
5
Bicarpellary
Liliaceae
Cymose
Actinomorphic
C
Tricarpellary
A - Racemose , B - Actinomorphic , C - 3 + 3 , D - Monocarpellary
A - Racemose , B - Zygomorphic , C - 5 , D - Bicarpellary
A - Cymose , B - Zygomorphic , C - 3 + 3 , D - Tricarpellary
A - Cymose , B - Actinomorphic , C - 5 , D - Multicarpellary
At resting, the axonal membrane of a neuron is more permeable to
sodium ions
calcium ions
potassium ions
negatively charged proteins.
Identify the cells labelled as A, B, C and D in the given diagram and select the correct option.
A - Eosinophil , B - Erythrocyte , C - Neutrophil , D - Basophil
A - Eosinophil , B - Lymphocyte , C - Neutrophil , D - Monocyte
A - Erythrocyte , B - Basophil , C - Neutrophil , D - Lymphocyte
A - Eosinophil , B - Monocyte , C - Neutrophil , D - Lymphocyte
Whgich of the following does not affect Hardy - Weinberg equilibrium ?
Genetic drift
Natural selection
Gene migration
Selective mating
Which of the following causes malignant malaria?
Plasmodium vivax
Plasmodium malaria
Plasmodium falciparum
Plasmodium ovale
The steps in DNA fingerprinting are given below. Arrange them in the correct sequence. (i) Transfer of separated DNA fragments to nitrocellulose membrane (ii) Isolation of DNA (iii) Hybridisation using labelled VNTR probe (iv) Separation of DNA fragments by electrophoresis (v) Detection of hybridised DNA fragments by autoradio-graphy (vi) Digestion of DNA by restriction endonucleases>
(i), (iii), (ii), (v), (vi), (iv)
(ii), (vi), (iv), (i), (iii), (v)
(iii), (ii),(v),(i),(iv),(vi)
(iv),(iii), (ii),(v),(i),(vi)
Verhulst-Pearl logistic growth is described by the equation :-
(a)
(b)
(c)
(d)
Which of the following statements regarding bioreactors is correct?
It is used in separation and purification of a product.
It is used as microinjection.
It is used in processing of large volumes of culture.
It is used in amplification of genes.
Which stage of mitosis is characterised by splitting of centromeres and separation of chromatids?
Metaphase
Anaphase
Telophase
Prophase
Which of the following plastids store oils and fats?
Aleuroplasts
Amyloplasts
Elaioplasts
Chromoplasts
Which of the following antibodies is abundantly present in colostrum?
IgG
IgM
IgE
IgA
Read the given statements about smoking. (i) Smoking increases carbon monoxide content in the blood. (ii) Smoking contains nicotine which helps in preventing gastric ulcers. (iii) It stimulates adrenal gland to release adrenaline into blood circulation. (iv) It increases the incidence of lung cancer and coronary heart disease.
Which of the above given statements are correct?
(i), (ii) and (iii) only
(i), (iii) and (iv) only
(i) and (iv) only
(ii) and (iv) only
The relative contribution of CH4, CFCs and N20 to total global warming is respectively
6%, 14% and 20%
25%, 6% and 10%
30%, 24% and 2%
20%, 14% and 6%.
In a grassland ecosystem, the largest population in a pyramid of numbers is that of
producers
primary consumers
secondary consumers
tertiary consumers
Tendons and ligaments are examples of
specialised connective tissue
loose connective tissue
dense irregular connective tissue
dense regular connective tissue.
Initiation codon of protein synthesis (in eukaryotes) is
GUA
GCA
CCA
AUG
Which of the following pair is mismatched?
Interstitial cells - secrete testosterone
Seminiferous tubules - produce sperms
Vas deferens - produce seminal fluid
Penis - transfers semen
---A----. is the outermost layer of alimentary canal made up of a thin mesothelium with some ---B--- tissue. Select the correct option for A and B.
A-Mucosa, B-muscular
A-Serosa, B-connective
A-Muscularis, B-connective
A-Sub-mucosa, B-muscular
Which of the following statements is correct?
Pure water has lowest water potential.
Water in a system moves from a region having higher water potential to the region of lower water potential.
Solute potential is always positive.
A positive pressure potential in xylem plays a major role in transporting water up a stem.
In snapdragon, the phenotypic ratio of F2 generation of a cross between pure white and pure red flower plant is
3 (red) : 1 (white)
1 (red) : 2 (pink): 1 (white)
1 (red) : 1 (pink)
3 (pink): 1 (white).
During photorespiratory pathway:-
only sugars are synthesised
both sugars and ATP are synthesised
only ATP is synthesised
neither sugars nor ATP are synthesised.
Read the following statements and select the correct ones. (i) Conidia are the asexual propagules found in Penicillium. (ii) A piece of potato tuber having at least one eye (or node) is capable of giving rise to a new plant. (iii) Ginger propagates vegetatively by underground roots. (iv) Vegetative propagation in Agave takes place by bulbil
(ii) and (iii) only
(i) and (iv) only
(i), (ii) and (iv) only
(i), (ii) and (iii) only
Which of the following are membrane-less organelle?
Mitochondria
Lysosomes
Ribosomes
Vacuoles
If the DNA content at G, phase is 1C, what will be the DNA content of the cells at S, G2 and M phase respectively?
2C,2C and 2C
2C,2C and 1C
1C, 1C and 2C
2C, 1C and 1C
Refer to the given figure of nephron.Identify A, B, C and D and select the incorrect option regarding them.
A-Glomerulus - a tuft of capillaries formed by afferent arteriole
B-PCT-lined by simple cuboidal brush border epithelium
C-Loop of Henle reabsorption of glucose, amino acids, water, Na+, K+ and uric acid
D-Collecting duct-extends from the cortex of the kidney to the inner parts of medulla
Which of the following is not a type of succulent fruits?
Berries
Drupes
Syconus
Pome
Big holes in Swiss cheese are made by a
a machine
a bacterium that produces methane gas
a bacterium producing a large amount of carbon dioxide
a fungus forming ethyl alcohol by fermentation
In which type of the following, do more individuals acquire peripheral character value at both ends of the distribution curve?
Stabilising selection
Directional selection
Disruptive selection
None of these
In DNA, when AGCT occurs, their association is as per which of the following pair?
AT-GC
AG-CT
AC-GT
All of these
Flattened petiole performing the function of photosynthesis is
phylloclade
pulvinus
phyllode
stipule
Levels of which hormone increases during secretory phase of menstrual cycle?
Follicle stimulating hormone
Estrogen
Progesterone
Luteinising hormone
Read the following statements and select the correct ones. (i) Catecholamines stimulate the breakdown of glycogen. (ii) Adrenal cortex secretes hormones which are involved in carbohydrate metabolism. (iii) Parathyroid hormone decreases Ca2+ absorption from the digested food. (iv) Hyperthyroidism causes cretinism in young ones
(i) and (ii) only
(ii), (iii) and (iv) only
(i), (iii) and (iv) only
(i) and (iv) only
Which of the following statements is incorrect about sickle-cell anaemia?
It is an autosomal recessive trait.
The defect is caused by the substitution of glutamic acid by proline.
The disease is controlled by a single pair of allele
A single base substitution at the sixth codon of the beta globin chain results in disease.
Ozone degradation is caused by
methane
carbon monoxide
chlorofluorocarbons
carbon dioxide.
Cattle and goats do not eat Calotropis because
it is distasteful to its predator
it produces highly poisonous glycosides
it possesses thorns
it is hard to chew.
Study carefully the given diagram of myosin monomer and select the correct option regarding it.
P is an active ATPase enzyme.
R are ATP binding sites.
S are actin binding sites.
P and Q together comprise light meromyosin.
What would be the nature of offspring in F2 progeny when a tall pea plant (TT) is crossed with dwarf plant (tt)?
All tall plants
All dwarf plants
Both tall and dwarf plants in 1 :1 ratio
Both tall plants and dwarf plants in 3 :1 ratio
Common ancestor of man and ape is
Australopithecus africanus
Dryopithecus africanus
Ramapithecus
Pithecanthropus erectus.
Tricarpellary, syncarpous, superior ovary with endospermous seeds is found in:-
Belladonna
Sesbania
Gloriosa
Trifolium
Select the incorrect pair.
Phyllotaxy - Alternate, Example - Sunflower
Phyllotaxy - Opposite and decussate, Example - Calotropis
Phyllotaxy - Whorled, Example - Alstonia
Phyllotaxy - Opposite and superposed, Example - China rose
The process of degradation of detritus into simpler inorganic substances by bacteria and fungi is known as:-
fragmentation
catabolism
humification
mineralisation
Which of the following is not used in catalytic converters?
Rhodium
Palladium
Lead
Platinum
Hotspots are priority areas for in situ conservation. The key criteria for determining a hotspot is/are:-
location in developed/undeveloped country
vicinity to the sea
species richness and number of endemic species
number of species got extinct.
Which of the following plants is not pollinated by water?
Vallisneria
Water lily
Hydrilla
Zostera
The Chipko movement for conservation of forests was started in 1974 at:-
Rajasthan
Silent Valley
Sunderbans
Garhwal
Stirred-tank bioreactors have been designed for:-
ensuring availability of oxygen throughout the process
addition of preservatives to the product
purification of the product
ensuring anaerobic conditions in the culture vessel.
Which one of the following is not a correct statement?
A museum has collection of photographs of plants and animals.
Key is a taxonomic aid for identification of specimens.
Herbarium consists of dried, pressed and preserved plant specimens.
Botanical gardens have collection of living plants for reference.
Select the incorrect statement:-
Proteins are heteropolymers made of amino acids.
Ribozymes are nucleic acids with catalytic power.
Nucleic acids serve as genetic material.
Proteins, nucleic acids and polysaccharides are the only three types of macromolecules found in the living system.
Select the correct statement regarding protein synthesis.
When the small subunit of the ribosome encounters mRNA, the process of translation begins.
Peptidase catalyses the formation of peptide bond.
UTRs are present between the start codon and stop codon.
At the end of translation, the release factor binds to the initiation codon.
The following diagrams represent the types of aestivation in corolla. Identify the correct combination of labelling.