a. Atomic level
b. Submicroscopic molecular level
c. Cellular level
d. Organismic level
Sol. Correct choice: (2)
a. calcium and phosphorous
b. phosphorus and sulphur
c. sulphur and magnesium
d. magnesium and sodium
Sol. Correct choice: (1)
a. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
b. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
c. Secretion of tears after falling of sand particles in to the eye
d. Salivation of mouth at the sight of delicious food.
Sol. When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering. Correct choice: 2
a. Homoiothermy
b. Seasonal migration]
c. Thick subcutaneous fat
d. Convergent evolution
Sol. Shark is poikilothermous. All three species show adaptations for aquatic life while these are not closely related. Correct choice: (4)
a. Phospholipids
b. Cholesterol
c. Glycolipids
d. Proline
Sol. Correct choice: (4)
a. The chloroplasts are generally much larger than mitochondria.
b. Both chloroplasts and mitochondria contain and inner and an outer membrane
c. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
d. Both chloroplasts and mitochondria contain DNA.
Sol. Correct choice: (3)
a. Nucleic acids
b. ATP is small stepwise units
c. ATP in one large oxidation reaction
d. Sugars
Sol. Correct choice: (2)
a. a skewed curve
b. a normal distribution
c. a bi-modal distribution
d. a T -shaped curve
Sol. Correct choice: (2)
a. Anabaena
b. Rhizopus
c. Physarum
d. Thiobacillus
Sol. Physarum is an acellular slime mould. Correct choice: (3)
a. Wheat and maiden hair fern
b. Sugarcane and sunflower
c. Teak and pine
d. Deodar and fern
Sol. Secondary growth occurs in gymnosperms and dicots. Correct choice: (3)
a. They cause disease in plants
b. They are also called PPLO
c. They are pleomorphic
d. They are sensitive to penicillin
Sol. Mycoplasma is not sensitive to penicillin due to absence of cell wall. Correct choice: (4)
a. self fertilization is prevented
b. there is no change in success rate of fertilization
c. there is high degree of sterility
d. one can conclude that the plant is apomictic
Sol. In vascular cryptogam i.e. in pteridophytes gametophyte is monoecious but protandrous to avoid self fertilization. Correct choice: (1)
a. have same number of chromosomes
b. can reproduce freely with each other and form seeds
c. have more than 90 per cent similar genes
d. look similar and possess identical secondary metabolities.
Sol. The members of a species are inter-fertile and produce fertile offsprings. Correct choice: (2)
a. Chemical composition of the cell wall
b. Types of pigments present in the cell
c. Nature of stored food materials in the cell
d. Structural organization of thallus.
Sol. The various algae are classified mainly on the types of pigments present in their cells. Correct choice: (2)
a. Riccia, Dryopteris and Cycas
b. Anthoceros, Funaria and Spirogyra
c. Zygnema, Saprolegnia and Hydrilla
d. Fucus, Marsilea and Calotropis
Sol. The male gametes of bryophytes are biflagellete, and those of pteriodophytes are multiflagellate, except Selaginella having biflagellate gametes. The male gametes of gymnosperms are non motile except those of Cycas having multiciliate gametes. Correct choice: (1)
a. the microsporangium in which pollen grains develop
b. a cell in the pollen grain in which the sperms formed
c. a cavity in the ovule in which pollen grains are stored after pollination
d. an opening in the mega gametophyte through which the pollen tube approaches the egg.
Sol. In gymnosperms, below micropylar beak some of the cells of nucellus of ovule disintigerate to form pollen chamber. Correct choice: (3)
a. peristome teeth
b. elaters
c. indusium
d. calyptra
Sol. In some liverworts like Marchantia spore dispersal is due to hydrochasy and is aided by elaters. Correct choice: (2)
a. Morchella and Mushrooms
b. Birds’ nest fungi and Pufballs
c. Pufballs and Claviceps
d. Peziza and Stink horns
Sol. Bird’s nest fungi – Cyathus, Pufballs – Lycoperdon, Both belong to the class Basidiomycetes. Correct choice: (3)
a. Indian Code of Botanical Nomenclature
b. Indian Congress of Biological Names
c. International Code of Botanical Nomenclature
d. International Congress of Biological Names
Sol. ICBN is one of the codes of nomenclature. It stands for International Code of Botanical Nomenclature. Correct choice: (3)
a. Claviceps
b. Phytophthora
c. Uncinula
d. Ustilago
Sol. Ergot of rye is caused by Claviceps purpurea. Correct choice: (1)
a. Convergent evolution
b. Divergent evolution
c. Microevolution
d. Co-evolution
Sol. Correct choice: (1)
a. Power of adaptation in an individual to a variety of environments
b. Adaptations due to Geographical isolation
c. Evolution of different species from a common ancestor
d. Migration of members of a species to different geographical areas
Sol. Correct choice: (3)
a. growth the movement
b. responsiveness to touch
c. interaction with the environment and progressive evolution
d. reproduction
Sol. Correct choice: (4)
a. Biogeographical Evolution
b. Special Creation
c. Evolution due to Mutation
d. Retrogressive Evolution
Sol. Correct choice: (1)
a. Random creation of new species
b. No change in the isolation faunax
c. Preventing Speciation
d. Speciation through reproductive isolation
Sol. Correct choice: (4)
a. Melanism is a pollution-generated feature
b. The true black melanic forms arise by a recurring random mutation
c. The melanic form of the moth has no selective advantage over lighter form in industrial area
d. The lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area.
Sol. It is an example of directional selection. Correct choice: (2)
a. Possible origin of life by combination of chemicals
b. Crystallization of chemicals under suitable environmental conditions
c. Interaction of water, air and clay under
d. Effect of solar radiation of chemicals
Sol. Correct choice: (1)
a. Homo habilis
b. Homo neanderthalensis
c. Homo erectus
d. Ramapithecus
Sol. Homo habilis had a cranial capacity in the range of 680-720 c.c. & that of Homo erectus erectus 775-990 c.c, Homo erectus pekinensis 915-1200 c.c., Homo neanderthalensis 1300-1600 c.c. Correct choice: (c)
a. Crocodile
b. Sea Urchin
c. Obelia
d. Lemur
-Chambered heart
- Parapodia
– Metagenesis
– Thecodont
(1) Only A and B
(2) A, C and D
(3) B, C and D
(4) Only A and D
Sol. Correct choice: (2)
a. Mutations are random and directional
b. Darwinian variations are small and directionless
c. Fitness is the end result of the ability to adapt and gets selected by nature
d. All mammals except whales and camels have seven cervical vertebrate.
Sol. It explains natural selection. Correct choice: (3)
a. Ventral heart
b. Post-anal tail
c. Ventral Central nervous system
d. Pharyngeal gill slits absent in embryo
- Scorpion
- Octopus
– Leech
– Chamaeleon
Sol. Scorpion has dorsal heart. Post-anal tail is found only in chordates. Pharyngeal gill slits are present in the embryo of chameleon. Correct choice: (3)
a. Ovoparity
b. Homoiothermy
c. Toothless jaws
d. Functional post -anal tail
Sol. Only birds & mammals are homoiothermous. Correct choice: (2)
a. They all belong to the same phylum
b. They all have jointed paired appendages
c. They all possess dorsal heart
d. None of them is aquatic
Sol. Correct choice: (3)
a. Ontogeny repeats phylogeny
b. Stem cells are specialized cells
c. There is no evidence of the existence of gills during embryogenesis of mammals
d. All plant and animal cells are totipotent.
Sol. Correct choice: (1)
a. IAA
b. GA
c. ABA
d. 2, 4 – D
Sol. Foolish seeding disease (Bakane disease) of rice is due to a fungus Giberella fujikuroi. Yabuta and Sumuki obtained achemical from the fungus and called gibbrellic acid. Correct choice: (2)
a. central region of style through which the pollen tube grows towards the ovary.
b. endodermis of roots facilitating rapid transport of water from cortex to pericycle.
c. phloem elements that serve as entry points for substances for transport to other plant parts.
d. testa of seed to enable emergence of growing embryonic axis during seed germination.
Sol. Passage cells also called transfusion tissue are found in the endodermis meant for rapid transport of water from cortex to pericycle. Correct choice: (2)
a. Quinone
b. Cytochrome
c. Iron-sulphur protein
d. Ferredoxin.
Sol. The first acceptor of electros from an excited chlorophyll is quinone. Correct choice: (1)
a. succinate dehydrogenase
b. lactate dehydrogenase
c. isocitrate dehydrogenase
d. malate dehydrogenase
Sol. Succinate dehydrogenase is a common enzyme for TCA and ETC. It is located on inner mitochondrial membrane. Rest of the TCA enzymes are present in mitochondrial matrix. Correct choice: (1)
a. 620 nm
b. 640 nm
c. 680 nm
d. 720 nm
Sol. The Pr form of phytochrome receives red light (600-680 nm) and changes into Pfr. Correct choice: (3)
a. Autonomic movement of growth
b. Autonomic movement of locomotion
c. Autonomic movement of variation
d. Paratonic movement of growth.
Sol. Opening of floral bud into flowers, is due to epinasty, a type of autonomic movement of growth. Correct choice: (1)
a. IAA – Cell wall elongation
b. Abscissic Acid – Stomatal closure
c. Gibberellic Acid – Leaf fall
d. Cytokinin – Cell division
Sol. Leaf fall is due to interaction of auxin and ethylene. Correct choice: (3)
a. Diploccus pneumoniae
b. Neurospora crassa
c. Salmonella typhimurium
d. Escherichia Coli
Sol. One gene-one enzyme hypothesis was given by Beadle and Tatum in red mould (Neurospora crassa). Correct choice: (2)
a. Microspore mother cell
b. Microspore
c. Generative cell
d. Vegetative cell
Sol. During the development of male gametophyte first of all two cells – generative cell and tube nucleus are formed from a pollen. This twocelled stage is called pollen grain. Finally the generative cell divides to form 2-male gametes. Correct choice: (3)
a. Movement of water of Cell A to B
b. Movement of water from Cell B to A
c. No movement of water
d. Equilibrium between the two
Sol. The direction of movement of water is from low to high DPD. Correct choice: (1)
a. Epidermis
b. Mesophyll
c. Bundle Sheath
d. Phloem
Sol. In C4 plants, C4 cycle occurs in mesophyll cells and C3 cycle in bundle sheath cells. Correct choice: (2)
a. Cicer arietinum
b. Casuarina equisetifolia
c. Crotalaria juncea
d. Cycas revolute
Sol. The filamentous nitrogen – fixing microorganism like Frankia occurs in root-nodules of non-leguminous plants like Casuarina and Alnus. Correct choice: (2)
a. Pollen grain
b. Microspore mother cell
c. Male gamete
d. Egg
Sol. The microspore mother cells develops an internal layer of callose which breaks the plasmodesmatal connections among themselves. Correct choice: (2)
a. Ca
b. Mn
c. Zn
d. Cu
Sol. Calcium is an essential macronutrient for plant growth. Correct choice: (1)
a. Haemocytes
b. Serum albumins
c. Serum globulins
d. Fibrinogen in the plasma
Sol. Correct choice: (3)
a. Calciferol – Pellagra
b. Ascorbic acid – Scurvy
c. Retinol – Xerophthalmia
d. Cobalamine – Beri-beri
Sol. Correct choice: (3)
a. Red blood cells
b. White blood cells
c. Unstriated muscle cells
d. Liver cells
Sol. RBCs do not have mitochondria & thus can respire only anaerobically. Correct choice: (1)
a. lower levels of adrenalin / noradrenalin in its blood
b. higher levels of thyroxin
c. higher levels of cortisone
d. lower levels of blood testosterone
Sol. The bullock is castrated and therefore secretion of testosterone is not adequate. Correct choice: (4)
a. FSH only
b. LH only
c. Combination of FSH and LH
d. Combination of estrogen and progesterone
Sol. Correct choice: (4)
a. Cranial nerves
b. Floating ribs
c. Collar bones
d. Salivary glands
- 10 pairs
- 2 pairs
– 3 pairs
–1 pair
Sol. Correct choice: (2)
a. Hyaline cartilage
b. Ciliated epithelium
c. Thrombocytes
d. Tendon
Sol. Correct choice: (2)
a. Whole blood from pulmonary vein
b. Blood plasma
c. Blood serum
d. Sample from the thoracic duct of lymphatic system
Sol. Blood serum does not contain fibrinogen and few other clotting factors, thus it will not coagulate. Correct choice: (3)
a. Gastrin
b. Thyroxin
c. Adrenaline
d. Glucagon
Sol. Correct choice: (3)
a. less urea in his urine
b. more sodium in his urine
c. less amino acids in his urine
d. more glucose in his blood.
Sol. Correct choice: (1)
a. Nucleus and mitochondria
b. Perikaryon and dendrites
c. Vacuoles and fibers
d. Flagellum and medullary sheath
Sol. Correct choice: (2)
a. Vitelline membrane
b. Graafian follicle
c. Stroma
d. Germinal epithelium
Sol. Correct choice: (2)
a. First positive, then negative and again back to positive
b. First negative, then positive and again back to negative
c. First positive, then negative and continue to be negative
d. First negative, then positive and continue to be positive.
Sol. Correct choice: (2)
a. Thyroid
b. Parathyroid
c. Parotid
d. Pancreas
Sol. Correct choice: (2)
a. Rann of Kutch
b. Dachigam National Park
c. Sunderbans
d. Periyar
- Wild Ass
- Snow Leopard
–Bengal Tiger
–Elephant
Sol. Dachigam National Park is for the conservation of Hangul. Correct choice: (2)
a. S < DE < PE < SE
b. SE < S < PE < DE
c. SE < PE < S < DE
d. PE < S < SE < DE
Sol. BOD of distillery effluent is 40,000 mg / l and that of paper mill effluent and sewage is 190 mg/l and 30 mg/l, respectively. Correct choice: (2)
a. Temperate deciduous forest
b. Tropical rain forest
c. Tropical deciduous forest
d. Temperate evergreen forest
Sol. Tropical rain forest has highest annual net primary productivity (9000 K cal / m 2 / yr). Correct Choice: (2)
a. Pongamia
b. Euphorbia
c. Beetroot
d. Sugarcane
Sol. Pongamia, Jatropa, Euphorbia are petrocrops. However, in the Indian countryside, Pongamia (Kanjar) is being utilized as a source of biodiesel. Correct choice: (1)
a. CO
b. SO2
c. NOX
d. SPM
Sol. Electrostatic precipitators control emission of suspended particle matter (SPM). Correct choice: (4)
a. Sewage fungus
b. Sludge-worms
c. Blood-worms
d. Stone flies
Sol. Correct choice: (4)
a. Predation on one another
b. Mutualism
c. Intra specific competition
d. Inter specific competition
Sol. Intra-specific competition occurs between the members of the same species. Correct choice: (3)
a. Ecosystem
b. Biotic community
c. Population
d. Landscape
Sol. Age structure is one of the characteristics of population. Correct choice: (3)
a. Nile perch, Ficus religiosa
b. Ficus religiosa, Lantana camara
c. Lantana camara, Water hyacinth
d. Water hyacinth, Prosopis cineraria
Sol. Lantana camara and Eicchornia czassipes (water hyacinth) are exotic species. Correct choice: (3)
a. Nepenthes
b. Podophyllum
c. Ocimum
d. Garlic
Sol. Podophyllum hexandrum – : (Papri), gives a drug from its rhizome; besides being stimulant and purgative and has destructive action on cancerous tissues. Correct choice: (2)
a. Bacillus
b. Pseudomonas
c. Trichoderma
d. Xanthomonas
Sol. Pseudomonas putida (superbug) developed by genetic engineering by Anand Mohan Chakravorty is used to control oil spills. Correct choice: (2)
a. Ribosome
b. Transfer RNA
c. Messenger RNA
d. DNA sequence
Sol. Correct choice: (4)
a. polymerize in the direction and explain DNA replication
b. result in transcription
c. polymerize in the direction and forms replication fork
d. prove semi-conservative nature of DNA replication
Sol. Replication occurs always in direction. Okazaki fragments, synthesized on DNA template, join to form lagging strand which grows in direction. Correct choice: (1)
a. n = 21 and x = 7
b. n = 7 and x = 21
c. n = 21 and x = 21
d. n = 21 and x = 14
Sol. The basic number (x) of wheat is 7. Thus the 6x = 2n = 42 and n = 21. Correct choice: (1)
a. Anticodon
b. RNA polymerase
c. Ribosome
d. Transcription factor
Sol. Correct choice: (4)
a. prevent chromosome loss
b. act as replicons
c. are RNA transcription initiator
d. help chromosome pairing
Sol. Telomerase seal the ends of the chromosomes. Correct choice: (1)
a. codominance
b. chromosomal aberration
c. point mutation
d. polygenic inheritance
Sol. Inheritance of skin colour in human is controlled by three genes, A, B and C. Correct choice: (4)
a. crossing of one F1progeny with male parent
b. crossing of one F2 progeny with male parent
c. crossing of one F2 progeny with female parent
d. studying the sexual behaviour of F1 progenies.
Sol. To find the genotype of hybrid, it is test crossed. Correct choice: (1)
a. TATA
b. TTAA
c. AATT
d. CACC
Sol. The DNA binding sequence for RNA polymerase is called TATA box. Correct choice: (1)
a. Higher number of the parental types.
b. Higher number of the recombinant types.
c. Segregation in the expected 9: 3: 3: 1 ratio.
d. Segregation in 3:1 ratio.
Sol. When the linked genes are situated quite close, the chances of crossing over are highly reduced. Due to this, large number of parental gametes are formed and only few recombinant gametes are formed. This results in higher number of parental types in F2 generation as compared to recombinants. Correct choice: (1)
a. Inducing mutations.
b. Bombarding the seeds with DNA.
c. Crossing of two inbred parental lines.
d. Harvesting seeds from the most productive plants.
Sol. Correct choice: (3)
a. Deletion of genes
b. Developmental mutations
c. Differential expression of genes
d. Lethal mutations
Sol. Correct choice: (3)
a. 3 : 1
b. 50 : 50
c. 9 : 1
d. 1 : 3
Sol. This is a monohybrid test cross. Correct choice: (2)
a. Through elimination of repetitive DNA.
b. Deletion of non-essential genes.
c. Super-coiling in nucleosomes.
d. DNAse digestion.
Sol. The nucleosome model explains the packaging of histone proteins and DNA in the chromatin material which forms the chromosome. Correct choice: (3)
a. from this upto eight identical twins can be produced
b. the egg is divided into 4 pairs of cells which are implanted into the womb of others cows
c. in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb other cows.
d. in the eight cell stage the individual cells are separated under electrical field for further development in culture media.
Sol. As per the experiment performed by the scientist from Japan. Correct choice: (3)
a. At present it is not possible to grow maize without chemical fertilizers.
b. Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.
c. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.
d. Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil.
Sol. The Agricultural run off contains high concentration of chemical fertilizers. Which is discharge in near by lakes causes nutrient enrichment of lakes called eutrophication. Correct choice: (2)
a. The population of its predators increases enormously.
b. S-shaped or sigmoid growth of this insect.
c. The food plants mature and die at the end of the rainy season.
d. Its population growth curve is of J-type.
Sol. A population which grows exponentially and crashes suddenly exhibits J-type growth curve. Correct choice: (4)
a. semiconservative
b. parallel
c. discontinuous
d. antiparallel
Sol. The two chains in a dsDNA run in opposite direction one while other in opposite direction. Correct choice: (4)
a. Cell wall development
b. Holdin g cells together
c. Protein synthesis
d. Chlorophyll synthesis
a. Live microbial food supplement
b. Safe antibiotics
c. Cancer inducing microbes
d. New kind of food allergens
Sol. Live microbial food supplements are called probiotics (e.g., curd). Correct choice: (1)
a. olfactory epithelium of our nose
b. proximal end of uriniferous tubules
c. anterior pituitary
d. female reproductive system of cockroach
Sol. Correct choice: (1)
a. Low temperature
b. Hot and humid environment
c. Eating fruits preserved in tin containers
d. Inhalation of seasonal pollen
Sol. Correct choice: (4)
a. AABB
b. AaBb
c. AaBB
d. AABb
Sol. The formula for gamete formation is 2n where n stands for number of heterozygous pairs. AaBb has 2 heterozygous pairs so it will form 4 types of gametes. Correct choice: (2)
a. Coliforms
b. Methanogens
c. Yeast
d. Streptomycetes - Vinegar
-Gobar gas
–Ethanol
–Antibiotic
Sol. Coliforms are bacteria found in colon e.g. E. coli. For the preparation of vinegar Acetobacter aceti is employed. Correct choice: (1)
a. Bombyx mori
b. Pila globosa
c. Apis indica
d. Kenia lacca -silk
-pearl
–honey
–lac
Sol. Pinctada vulgaris is a bivalve from which pearl is obtained. Correct choice: (2)
a. Pasteurellosis
b. Salmonellosis
c. Coryza
d. New Castle disease
Sol. Correct choice: (4)
a. 45 – 70 MHz
b. 30 – 45 MHz
c. 15 – 30 MHz
d. 1 – 15 MHz
Sol. Correct choice: (4)
a. most virus-infected cells
b. certain fungi
c. certain types of bacteria
d. all viruses
Sol. Correct choice: (3)