Abnormal curvature of the vertebral column where the alignment shows a lateral deviation is called as:
The average weight of the human kidney varies between:
1. 80 – 120 gm
2. 120 – 170 gm
3. 180 – 200 gm
4. 225 – 245 gm
The duration of inspiration can be reduced by:
1. an increase of carbon dioxide in blood
2. a chemical signal from aortic and carotid bodies
3. a neural signal from pneumotaxic center
4. an increase in hydrogen ion concentration in CSF
The autonomic regulation of cardiac activity is carried out by a neural center located in:
1. Medulla oblongata
In the given diagram of olfactory membrane identify the olfactory receptor cell:
If potassium ions were the only factor causing resting membrane potential, the resting potential inside the fiber would be nearly equal to:
1. - 55 mV
2. - 70 mV
3. - 94 mV
4. + 61 mV
Which accessory sex duct is cut and ligated during vasectomy procedure?
1. Vasa efferentia
2. Vas deferens
4. Prostatic urethra
The trophoblast cells of the blastocyst form:
2. Umblical cord
Between childhood and puberty, the ovaries will have follicles containing:
1. Primary oocyte
2. Secondary oocyte
Lysozyme and thiocynate ions present in saliva:
1. hydrolyse amylose but not amylopectin
2. hydrolyse amylopectin but not amylase
3. help bacterial flora in oral cavity to thrive
4. are very important for oral hygiene
Which group of hormones will both bind to membrane bound receptors located on its target cells?
1. Epinephrine and thyroxine
2. Calcitonin and glucagon
3. Estradiol and triiodothyronine
4. Adrenaline and aldosterone
The triple helix structure of collagen was discovered by:
1. G. N. Ramachandran
2. Y. S. Subbarao
3. C. V. Raman
4. S. Chandrashekhar
Which of the following statements is NOT true of mitosis?
1. A single nucleus gives rise to two identical daughter nuclei.
2. The daughter nuclei are genetically identical to the parent nucleus.
3. The centromeres divide at the onset of anaphase.
4. Homologous chromosomes synapse in prophase.
Which statement regarding enzyme inhibition is correct?
1. Competitive inhibition occurs when a substrate competes with enzyme for binding to inhibitor protein
2. Competitive inhibition occurs when a substrate and the inhibitor compete for active site on the enzyme
3. Non-competitive inhibition of an enzyme can be overcome by adding a large amount of substrate
4. Non-competitive inhibitors often bind to the enzyme irreversibly
The ‘Roquefort cheese’ are ripened by:
1. A fungus
2. A bacterium
3. An algae
Gene cloning occurs:
1. when a phage transfers bacterial DNA from one bacterium to another.
2. when a bacterium takes up DNA from the surrounding fluid.
3. when a bacterium carrying a recombinant plasmid reproduces, thus allowing for the production of multiple copies of the recombinant plasmid.
4. when DNA is produced from an RNA template.
Flowering plants (angiosperms) first appeared during :
1. Paleozoic era
2. Carboniferous period
3. Cretaceous period
4. Cenozoic era
The cranial capacity of Homo erectus was around:
1. 450 cc
2. 700 cc
3. 900 cc
4. 1000 cc
RNAi, as a mechanism of cellular defense, takes place in:
1. All bacteria
2. All unicellular organisms
3. All plants only
4. All eukaryotic organisms
A molecule that can act as a genetic material must fulfill all the following criteria except:
1. It should be able to generate its replica.
2. It should chemically and structurally be stable.
3. It should be able to express itself in the form of Medelian characters.
4. It should provide scope for rapid changes required for evolution.
If a father and son are both affected by red-green colour blindness, then what can be said definitely?
I. The son has received the trait from the father.
II. The mother of the affected son has to be affected by red-green colour blindness.
III. Any sister of the affected son can never be affected by red-green colour blindness,
1. I and II only
2. I and III only
3. II and III only
Consider the following two statements:
I. An effective germplasm collection is the prerequisite of any successful plant breeding programme.
II. Genetic variability is the root of anybreeding programme.
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. I is false but II is true
Match the structure in COLUMN I with description in COLUMN II and choose your answer from the codes given below:
COLUMN I COLUMN II
A. Stigma a. Landing platform for pollen grains
B. Ovary b. Basal bulged part of the pistil
C. Placenta c. Part of the ovary where funiculus attaches
D. Ovule d. Megasporangium
A. B. C. D.
1. a b c d
2. a c d b
3. b a d c
4. d c b a
I. Is a layer of nutritive cells found within the microsporangium
II. The cells are usually bigger and normally have more than one nucleus per cell
because the mitosis is not normal in them
III. Helps in pollenwall formation, transportation of nutrients to inner side of anther, synthesis of callase enzyme for separation of microspore tetrads
Of the above statements, correct are:
1. I and II only
2. I and III only
3. II AND III only
4. I, II and III
Cannabinoid receptors are principally located in the brain but they also have side effects on:
Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?
1. 5’ – UAC – 3’
2. 5’ – TAC – 3’
3. 3’ – UAC – 5’
4. 3’ – TAC – 5’
A plant with the genotype Tt should be called:
Identify the correct chronological order of the taxonomic hierarchy from lowest to highest:
1. Family – Order – Class – Phylum
2. Family – Class – Order – Phylum
3. Order – Family – Class – Phylum
4. Order – class – Phylum – Family
Identify the incorrect statement regarding red algae:
1. Major pigments are chlorophyll a, c and phycocyanin
2. Stored food is floridean starch
3. Cellulosic cell wall with pectin and polysulfate esters
4. Absent flagellar insertions
Match each item in Column I with one in Column II and choose the correct answer from the codes given:
Non motile protozoan
A B C D
1. a b c d
2. b a c d
3. a b d c
4. b a d c
The cell walls of diatoms are ‘indestructible’ as they are embedded with:
The inner lining of the trachea and large bronchi is covered by:
1. Pseudostartified epithelium
2. Ciliated cuboidal epithelium
3. Transitional epithelium
4. Squamous epithelium
Root hairs are:
1. unicellular extensions of subsidiary cells
2. unicellular elongations of epidermal cells
3. unicellular elongations of ground tissue cells
4. appendage of the cuticle
Tepal six [3+3], epipetpalous stamens and tricarpellarysyncarpous superior ovary is seen in:
Stamens attached to the perianth as in the flowers of lily are called as:
Match the following list of animals with their level of organization.
Division of Labour Animal
A. Organ level i. Pheritima
B. Cellular aggregate level ii. Fasciota
C. Tissue level iii. Spongilla
D. Organ system level iv. Obelia
Choose the correct match showing division of labour with animal example.
1. i-B, ii-C, iii-D, and iv-A
2. i-B, ii-D, iii-C, and iv-A
3. i-D, ii-A, iii-B, and iv-C
4. i-A, ii-D, iii-C, and iv-B
Sponges are mostly:
2. Radially symmetrical
3. Bilateraly symmetrical
4. Biradially symmetrical
1. A component in the ecosystem
2. Composed of the plants present in the soil
3. Life in the outer space
4. Composed of all living organisms present on earth which interact with the physical environment
Which of the following exhibits biomagnifications?
4. Both b & c
The “Polyblend” developed by Ahmad Khan is a:
1. possible solution to accumulating plastic wastes
2. method for dealing with electronic wastes
3. synthetic fiber produced in India
4. organic farming product
Where among the following will you find pitcher plant? (NCERT Exemplar)
1. Rain forest of North-East India
3. Thar desert
4. Western ghats
Productivity is the rate of production of biomass expressed in terms of (NCERT Exemplar) :
3. ii and iv
4. i and iii
The three steps of decomposition:
1. Occur sequentially with catabolism being last
2. Occur sequentially with leaching being last
3. Occur simultaneously
4. Occur sequentially but not ina particular order
In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. All the following would exemplify this except:
At how many points in the TCA cycle is reduced to NADH + ?
In Section 13.7 NCERT says that “immediately after light becomes unavailable, the biosynthetic process continues for some time and then stops”. Why does it stop after some time?
1. The respiration stops in the absence of light and hence synthesis of sugars is stopped
2. The reactions of the biosynthetic phase are directly dependent on light
3. The reactions of the biosynthetic phase are dependent on the products of light reaction
4. This is a mistake in NCERT as Dark Reactions will continue throughout night
Phloem sap is mainly:
1. Glucose and Water
2. Hormones and Amino acids
3. Water and Sucrose
4. Amino acids and water
A fall in glomerular filtration rate (GFR) activates
1. Adrenal medulla to release adrenaline
2. Posterior pituitary to release vasopressin
3. Juxta glomerular cells to release renin
4. Adrenal cortex to release aldosterone
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.
Pairs of skeletal parts
Malleus and stapes
Sternum and ribs
Clavicle and glenoid cavity
Humerus and ulna
Cornea transplant in humans is almost never rejected. This is because
1. It is a non-living layer.
2. Its cells are least penetrable by bacteria.
3. It has no blood supply.
4. It is composed of enucleated cell.
Compared to blood our lymph has
(1) More RBCs and less WBCs
(2) No plasma
(3) Plasma without proteins
(4) More WBCs and no RBCs
A pregnant female delivers a baby who suffers from stunted growth, mental retardation low intelligence quotient and abnormal skin. Thin is the result of
(1) Deficiency of iodine in diet
(2) Low secretion of growth hormone
(3) Cancer of the thyroid gland
(4) Over secretion of pars distalis
Given below is a diagrammatic sketch for a portion of the human male reproductive system. Select the correct set of the names of the parts labelled a, b, c, d
Jaundice is a disorder of
1. Skin and eyes.
2. Digestive system.
3. Circulatory system.
4. Excretory system.
What kind of evidence suggested that man is more closely related with a chimpanzee than with other hominoid apes?
1. Comparison of chromosomes morphology only.
2. Evidence from fossil remains, and the fossil mitochondrial DNA alone.
3. Evidence from DNA extracted from sex chromosomes, autosomes and mitochondria.
4. Evidence from DNA from sex chromosomes only.
DNA- dependent RNA polymerase catalyzes transcription on the strand of the DNA which is called the
2. Template strand
3. Coding strand
4. Alpha strand
On which organism Beadle and Tatum worked to propose one gene-one enzyme hypothesis
2. Escherichia coli
3. Neurospora crassa
Which one of the following fruits is parthenocarpic?
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
Which is the most common mechanism of genetic variation in the population of a sexually-reproducing organism?
1. Chromosomal aberrations
2. Genetic drift
R and Y genes of Maize lie very close to each other. When RRYY and rryy genotype are hybridised, F2 generation will show
1. Segregation in 9: 3 : 3 : 1 ratio
2. Segregation is 3 : 1 ratio
3. Higher number of parental types
4. Higher number of recombinant types
When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both is parents. This phenomenon is called:
A polyestrous animal is
In S phase of the cell cycle
1. Amount of DNA doubles in each cell
2. Amount of DNA remains same in each cell
3. Chromosome number is increased
4. Amount of DNA is reduced to half in each cell
Read the following statements (A-E) and answer the question which follows them.
(A) In liverworts, mosses, and Ferns gametophytes are free-living
(B) Gymnosperms and some Ferns are heterosporous
(C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous
(D) The sporophyte in liverworts is more elaborate than that in mosses
(E) Both, Pinus and Marchantia are dioecious
How many of the above statements are correct?
The imperfect fungi which are decomposer of litter and help in mineral cycling belong to:
Why vivipary is an undesirable character for annual crop plants?
1. It reduces vigour of the plant.
2. It adversely affects the fertility of the plant
3. The seeds exhibit long dormancy
4. The seeds cannot be stored under normal conditions for next season.
The balloon-shaped structures called tyloses
1. are linked to the ascent of sap through xylem vessels
2. originate in the lumen of vessels
3. characterize the sapwood
4. are extensions of xylem parenchyma cells into vessels
Choose the correctly matched pair
1. Tendon-Specialized connective tissue
2. Adipose tissue-Dense connective tissue
3. Areolar tissue- Loose connective tissue
4. Cartilage-Loose connective tissue
Body having meshwork of cell, internal cavities lined with food filtering flagellated cells and indirect
development are the characteristics of phylum –
A cell organelle containing hydrolytic enzymes is
Which of the following describes the given graph correctly?
(1) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme
(2) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme
(3) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme
(4) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme.
Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
2. Nitrous oxide
Niche overlap indicates
1. active cooperation between two species.
2. two different parasites on the same host.
3. sharing resources between two species
4. mutualism between two species.
Importance of day length in flowering of plants was first shown in
Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?
(a) White blood cells
(b) Unstriated muscle cells
(c) Liver cells
(d) Red blood cells
The first step for initiation of photosynthesis will be
1. Photolysis of water
2. Excitement of chlorophyll molecule due to absorption of light
3. ATP formation
4. Glucose formation
An organism used as a biofertilizer for raising soyabean crop is
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, trichomoniasis?
1. Trichomoniasis is a STD whereas others or not.
2. Gonorrhoea is a viral disease whereas others are bacterial
3. HIV is a pathogen whereas others are diseases.
4. Hepatitis B is eradicated completely whereas others are not
The translocation of organic solutes in sieve tube members is supported by:
(a) root pressure and transpiration pull
(c) mass flow involving a carrier and ATP
(d) cytoplasmic streaming
Capacitation occurs in
1. rete testis
3. vas deferens
4. female reproductive tract
The majority of carbon dioxide produced by our body cells is transported to the lungs:
1. dissolved in the blood
2. as bircarbonates
3. as carbonates
4. attached to haemoglobin
Changes in GnRH pulse frequency in females is controlled by circulating levels of
1. estrogen and inhibin
2. progesterone only
3. progesterone and inhibin
4. estrogen and progesterone
A selectable marker is used to :
1. help in eliminating the non transformants so that the transformants can be regenerated
2. identify the gene for a desired trait in an alien organism
3. select a suitable vector for transformation in a specific crop
4. mark a gene on a chromosome for isolation using restriction enzyme
Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers ?
1. Aspergillus and Rhizopus
2. Rhizobium and Rhizopus
3. Cyanobacteria and Rhizobium
4. Aspergillus and Cyanobacteria
Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to the newborn infants because it contains:
1. Immunoglobulin A
2. Natural killer cells
Which of the following pair of gases is mainly responsible for green house effect?
1. Carbon dioxide
2. Ozone and Ammonia
3. Oxygen and Nitrogen
4. Nitrogen and Sulphur dioxide
Which of the following ecological pyramids is generally inverted?
1. Pyramid of biomass in a sea
2. Pyramid of numbers in grassland
3. Pyramid of energy
4. Pyramid of biomass in a forest
Which of the following is the most important cause for animals and plants being driven to extinction?
1. Alien species invasion
2. Habitat loss and fragmentation
3. Drought and floods
4. Economic exploitation
Which of the following statements is not correct?
1. The proinsulin has an extra peptide called C-peptide
2. The functional insulin has A and B chains linked together by hydrogen bonds.
3. Genetically engineered insulin is produced in E-Coli.
4. In man, insulin is synthesized as proinsulin.