During muscle contraction, the length of which of the following remains the same?
1. I-Band
2. H-Zone
3. Sarcomere
4. A-Band
All the following are the physiological effects of angiotensin II except:
1. Vasoconstriction in renal artery and afferent arteriole
2. Vasodilation in efferent arteriole
3. Increased sodium absorption in PCT
4. Stimulation of adrenal cortex to release aldosterone
As the filtrate passes upward in the ascending limb of loop of Henle:
1. it gets diluted due to the reabsorption of water from medullary interstitium
2. it gets diluted due to the passage of electrolytes to medullary interstitium
3. it gets concentrated due to the reabsorption of electrolytes from medullary interstitium
4. it gets concentrated due to the passage of water to medullary interstitium
The type of cartilage that makes epiglottis is:
1. Elastic
2. Hyaline
3. Calcified
4. Fibrous
Identify the incorrectly matched pair:
1. Average duration of a cardiac cycle: 0.8 sec
2. Stroke volume of each ventricle: 120 ml
3. Highest normal systolic blood pressure: 140 mm Hg
4. Highest normal diastolic blood pressure: 90 mm Hg
What causes the movement of the synaptic vesicles towards the membrane during transmission of impulse across a chemical synapse?
1. Sodium | 2. Calcium |
3. cAMP | 4. cGMP |
Multiload – 375 is a:
1. Barrier contraceptive
2. Cu releasing IUD
3. Hormonal IUD
4. Hormonal sub-dermal implant
Corpus luteum secretes large amounts of:
1. | LH | 2. | FSH |
3. | Progesterone | 4. | Estrogen |
The final mature follicle is called:
1. | Primordial follicle | 2. | Primary follicle |
3. | Vesicular follicle | 4. | Graafian follicle |
Most of the neurons in the cerebral cortex are:
1. | Unipolar | 2. | Bipolar |
3. | Multipolar | 4. | Pseudounipolar |
What is not true regarding vomiting?
1. It is the ejection of stomach contents through the mouth.
2. It is usually voluntary but can occur as a reflex action.
3. It is controlled by the vomit centre in the medulla oblongata.
4. A feeling of nausea precedes vomiting.
The adrenal medulla is functionally related to:
1. Hypothalamic-hypophyseal portal system
2. Parasympathetic neural system
3. Sympathetic neural system
4. Somatic neural system
Glycogen is a polymer of :
1. Galactose
2. Glucose
3. Fructose
4. Sucrose
Identify the incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower
BOD of waste water is estimated by measuring the amount of:
1. total organic matter
2. biodegradable organic matter
3. oxygen evolution
4. oxygen consumption.
The essay “On the tendencies of Varieties to Depart Indefinitely from the Original Type” was authored by :
1. A.R.Wallace
2. Charles Darwin
3. Charles Lyell
4. Joseph Dalton Hooker
Plica semilunaris on the inside corner of the eye and, muscles in the pinna are:
1. | analogous structures | 2. | homologous structures |
3. | vestigial structures | 4. | phylogenetic structures |
Griffith co-injected the heat-killed S and live R strains of Pneumococcus bacterium into the mice and much to his surprise the mice developed pneumonia and died. He concluded that:
I: | Live R was transformed into Live S strain as he was able to isolate Live S strain from the blood of the infected mice. |
II: | Bacterial transformation is a stable and heritable change as the culture of bacteria isolated from dead mice was unable to infect other mice. |
1. | Both I and II are correct |
2. | Only I is correct |
3. | Only II is correct |
4. | Both I and II are incorrect |
Any part of a plant taken out and grown in a test tube under sterile conditions in special nutrient media for generating new plants is called:
1. | Implant | 2. | Explant |
3. | Supplant | 4. | Plantlet |
The pollen tube releases the two male gametes first into:
1. The vicinity of the egg cell.
2. The vicinity of polar nuclei.
3. In the cytoplasm of synergids.
4. In the cytoplasm of antipodals.
What type of immunity is used in the treatment of a patient of snakebite?
1. Naturally acquired active immunity
2. Artificially acquired active immunity
3. Artificially acquired passive immunity
4. Naturally acquired passive immunity
The unequivocal proof that DNA is the genetic material was provided by:
1. | Avery, Macleod, and McCarty |
2. | Hershey and Chase |
3. | Meselson and Stahl |
4. | Watson and Crick |
In a dissimilar situation, the unit factor that expresses itself is called as:
1. | Dominant | 2. | Recessive |
3. | Epistatic | 4. | Hypostatic |
An individual affected by Klinefelter’s syndrome:
1. | Has 47 autosomes. |
2. | Has overall feminine development. |
3. | Has gynecomastia. |
4. | Has an additional copy of the Y chromosome. |
From the statements given below, choose the option that is true for a typical female gametophyte of a flowering plant:
i. | It is 8-nucleate and 7-celled at maturity |
ii. | It is free-nuclear during the development |
iii. | It is situated inside the integument but outside the nucellus |
iv. | It has an egg apparatus situated at the chalazal end |
1. | i and iv | 2. | ii and iii |
3. | i and ii | 4. | ii and iv |
Who among the following was awarded the Nobel Prize for the development of the PCR technique?
1. | Herbert Boyer | 2. | Hargovind Khurana |
3. | Kary Mullis | 4. | Arthur Kornberg |
A probe which is a molecule used to locate homologous sequences in a mixture of DNA or RNA molecules could be:
1. | A ssRNA | 2. | A ssDNA |
3. | Either RNA or DNA | 4. | Can be ssDNA but not ssRNA |
Which of the following are the defining properties of life?
1. Growth and Reproduction
2. Cellular organization and Consciousness
3. Growth and Consciousnes
4. Cellular organization and Reproduction
A difference between a gymnosperm and an angiosperm would be:
1. Lack of a flower
2. Undeveloped vascular tissue
3. Xylem is mainly composed of vessels and phloem contains companion cell in angiosperms
4. Microspore grows into a pollen tube
In general, the viruses that infect plants have:
1. | Single stranded RNA | 2. | Single stranded DNA |
3. | Double stranded RNA | 4. | Double stranded DNA |
The chief producers in the oceans are:
1. | Floating hydrophytes | 2. | Blue green algae |
3. | Desmids | 4. | Diatoms |
Telomerase is an enzyme which is a:
1. Ribonucleoprotein
2. Simple protein
3. RNA
4. Repetitive DNA
During the formation of leaves and the elongation of stem, some cells are left behind from the shoot apical meristem and constitute the:
1. Leaf primordium
2. Shoot apical meristematic zone
3. Differentiating vascular tissue
4. Axillary bud
Seed coat is membranous and generally fused with the fruit wall in:
1. | Apple | 2. | Maize |
3. | Coconut | 4. | Castor |
What is not true for a stem in a flowering plant in general?
1. Negatively geotropic
2. Develops from plumule of the germinating embryo
3. Absence of terminal and axillary buds
4. Spreads out branches bearing leaves, flowers and fruits
Which one of the following types of cell is involved in making of the inner walls of large blood vessels?
1. Cuboidal epithelium
2. Columnar epithelium
3. Squamous epithelium
4. Stratified epithelium
Which of the following does not belong to Protostomia?
1. Annelids
2. Mollusks
3. Echinoderms
4. Arthropods
Select one which is not true for ribosome
1. Made of two sub units
2. Form poly some
3. May attach to m RNA
4. Have no role in protein synthesis
A painful bone condition is produced when the drinking water is contaminated with:
1. Lead
2. Mercury
3. Cadmium
4. Arsenic
According to the recommendations of the National Forest Policy of 1988, what percentage of the area is recommended as forest cover for hills?
1. | 19 | 2. | 33 |
3. | 50 | 4. | 67 |
Identify the “vulnerable species in India”:
1. Berberis nilghiriensis and Sus salvanius
2. Bentickia nicobarica and Ailurus fulgens
3. Cupressus cashmeriana and Antilope cervicapra
4. Bentickia nicobarica and Antilope cervicapra
The reservoir is located in the Earth’s crust for:
I. Gaseous type of nutrient cycle
II. Sedimentary nutrient cycle
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
“Competitive Exclusion Principle” may be true if:
1. The competing species are equally capable
2. Resource partitioning occurs
3. There is only intraspecific competition
4. Resources are limiting
The most ecologically relevant environmental factor is:
1. | Temperature | 2. | Water |
3. | Light | 4. | Soil |
Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence
If you have carefully read the role of macronutrients in your NCERT, you should be able to tell the name of the mineral that plays an important role in several carbon dioxide transfers catalyzed by carboxylase enzymes. The mineral is:
1. Magnesium
2. Sulfur
3. Iron
4. Calcium
The movement of water through the root layers is ultimately:
1. apoplastic along the walls | 2. active transport by porins |
3. symplastic in the endodermis | 4. symplastic in the xylem |
Unlike a symporter and an antiporter, a uniporter:
1. is not an integral membrane protein
2. is a cell surface carbohydrate
3. is not a co-transporter
4. cannot be used for active transport
Perhaps the biggest reason for the enormous success of Arthropods is?
1. Chitinous exoskeleton
2. Diverse appendages
3. Respiration by tracheoles
4. Internal fertilization
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
1. Relaxin-Gigantism | 2. Prolactin-Cretinism |
3. Parathyroid hormone-Tetany | 4. Insulin-Diabetes insipidus |
Darwin's in his natural selection Theory did not believe in any role of which one of the following in organic evolution?
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
What is it that forms the basis of DNA Fingerprinting?
1. | The relative proportions of purines and pyrimidines in DNA. |
2. | The relative difference in the DNA occurrence in blood, skin, and saliva. |
3. | The relative amount of DNA in the ridges and grooves of the fingerprints. |
4. | Satellite DNA occurring as highly repeated short DNA segments |
Geitonogamy involves
1. Fertilization of a flower by the pollen from another flower of the same plant
2. Fertilization of a flower by the pollen from same flower
3. Fertilization of a flower by the pollen from a flower of another plant in the same population
4. Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population
In oogamy, fertilization occurs between
1. Small non-motile female gamete and large motile male gamete
2. Large non-motile female gamete and small motile male gamete
3. A large non-motile female gamete and a small non-motile male gamete
4. A large motile female gamete and a small non-motile male gamete
The first human hormone produced by recombinant DNA technology is
1. Insulin
2. Estrogen
3. Thyroxin
4. Progesterone
In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to :
1. | Active immunity | 2. | Allergic response |
3. | Graft rejection | 4. | Auto-immune disease |
If two persons with 'AB' blood group marry and have a sufficiently large number of children, these children could be classified as 'A' blood group: 'AB' blood group: 'B'blood group in a 1:2:1 ratio. The modern technique of protein electrophoresis reveals the presence of both' A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:
1. | Incomplete dominance | 2. | Partial dominance |
3. | Complete dominance | 4. | Codominance |
A mutation at a gene locus changes a character due to change in
1. DNA replication
2. Protein synthesis pattern
3. RNA transcription pattern
4. Protein structure
Interspecific hybridization is the mating of
1. more closely related individuals within same breed for 4-6 generations
2. animals within same breed without having common ancestors
3. two different related species
4. superior males and females of different breeds
Match the following list of microbes and their importance.
(a) |
Saccharomyces cerevisiae |
(i) |
Production of immunosuppressive drug |
(b) |
Moancus purpureus |
(ii) |
Ripening of Swiss cheese |
(c) |
Trichoderma polysporum |
(iii) |
Commercial production of ethanol |
(d) |
Propionibacterium shermanii |
(iv) |
Production of blood cholesterol lowering agents |
(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iii) (iv) (i) (ii)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)
In the somatic cell cycle,
1. DNA replication takes place in S-phase
2. A short interphase is followed by a long mitotic phase
3. G2 phase follows mitotic phase
4. In G1 phase, DNA content is double the amount of DNA present in the original cell
Which set contains flagellated male gametes?
1. Spirogyra, Anthoceros and Funaria
2. Zygnema, Saprolegnia and Hydrilla
3. Fucus, Marsilea and Calotropis
4. Riccia, Dryopteris and Cycas
Pigment-containing membranous extensions in some cyanobacteria are :
1. Basal bodies
2. Pneumatophores
3. Chromatophores
4. Heterocysts
Pineapple (Ananas) fruit develops from
1. Cluster of flowers borne compactly on a common axis
2. Multilocular monocarpellary flower
3. Unilocular polycarpellary flower
4. Multipistillate syncarpous flower
Water containing cavities in vascular bundles are found in
1. Sunflower | 2. Maize |
3. Cycas | 4. Pinus |
A piece of bone, such as femur of frog, if kept in dilute HCI for about a week will
1. assume black colour | 2. shrink in size |
3. turn flexible | 4. crack into pieces |
Which of the following match is correct?
1. Cockroach – Crustacea
2. Pila – Pelecypoda
3. Spider – Arachnida
4. Unio – Gastropoda
Match the following and select the correct answer :
(a) | Centriole | (i) | Infoldings in mitochondria |
(b) | Chlorophyll | (ii) | Thylakoids |
(c) | Cristae | (iii) | Nucleic acids |
(d) | Ribozymes | (iv) | Basal body cilia or flagella |
A | B | C | D | |
1. | (iv) | (ii) | (i) | (iii) |
2. | (i) | (ii) | (iv) | (iii) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (iv) | (iii) | (i) | (ii) |
Which one of the following enzymes carries out the initial step in the digestion of milk in humans?
1. Pepsin
2. Rennin
3. Lipase
4. Trypsin
Which one of following pairs of gases are the major cause of "Greenhouse effect"
1. and
2. and CO
3. CFCs and
4. and
Which one of the following is correct percentage of the two (out of the total of 4) green house gases tocontribute to the total global warming.
1. 6%, 86 %
2. Methane 20% , 18%
3. 40%, CFC 30%
4. CFCs 14%, methane 20%
An example of ex situ conservation is :
1. National Park
2. Seed Bank
3. Wildlife santuary
4. Sacred Grove
Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in
1. Tropical Savannah
2. Tropical Rain Forest
3. Grassland
4. Temperate Forest
Secondary productivity is rate of formation of new organic matter by:
1. Parasite
2. Consumer
3. Decomposer
4. Producer
Oxidative phosphorylation is
1. formation of ATP by transfer of phosphate group from a substrate to ADP
2. oxidation of phosphate group in ATP
3. addition of phosphate group to ATP
4. formation of ATP by energy release from electrons removed during substrate oxidation
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
1. | C4 | 2. | CAM |
3. | Nitrogen-fixer | 4. | C3 |
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options.
1. Both process can happen together because the diffusion coefficients of water and CO2 are different.
2. The above processes happen only during night time
3. One process occurs during the day time and the other occurs at night
4. Both processes cannot happen simultaneously
An example of stretch reflex triggered by passive muscle movement is the
1. tendon reflex
2. ipsilateral reflex
3. flexor reflex
4. patellar reflex
Which of the following is a hormone releasing Intra Uterine Device (IUD)?
1.Multiload 375
2. LNG-20
3. Cervical cap
4. Vault
Women who consume the drug thalidomide for relief from vomiting during the early months of pregnancy give birth to children with :
1. | No spleen | 2. | Harelip |
3. | Extra fingers and toes | 4. | Underdeveloped limbs |
You are required to draw blood from a patient and keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?
1. Test tube containing calcium bicarbonate
2. Chilled test tube
3. Test tube containing heparin
4. Test tube containing sodium oxalate
Signals for parturition originate from
1. both placenta as well as fully developed foetus
2. oxytocin released from maternal pituitary
3. placenta only
4. fully developed foetus only
Which one of the following is a fat-soluble vitamin and its related deficiency disease?
1. Ascorbic acid - Scurvy
2. Retinol - Xerophthalmia
3. Cobalamine - Beri-Beri
4. Calciferol - Pellagra
A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed:
1. on the blind spot
2. behind the retina
3. in front of the retina
4. on the yellow spot
Which of the following is true for excretion in humans?
1. Glucose and amino acids are reabsorbed in PCT by simple diffusion.
2. DCT is impermeable to water.
3. On an average, 25-30 gm of urea is excreted out per day.
4. Maximum reabsorption occurs in the loop of Henle.
The partial pressure of oxygen in the alveoli of the lungs is
1. equal to that in the blood
2. more than that in the blood
3. less than that in the blood
4. less than that of carbon dioxide
The source of somatostatin is same as that of
1. thyroxine and calcitonin
2. insulin and glucagon
3. somatotropin and prolactin
4. vasopresin and oxytocin
Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage ?
1. Beadle and Tatum
2. Messelson and Stahl
3. Hershey and Chase
4. Jacob and Monod
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
Spooling is :-
(1) Amplification of DNA
(2) Cutting of separated DNA bands from the agarose gel
(3) Transfer of separated DNA fragments to synthetic membranes
(4) Collection of isolated DNA