Class/Course - Class XII

Subject - Biology

Total Number of Question/s - 4195


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  • 1. Reproduction in Organisms - Quiz

    1. To get haploid callus, one can culture
    a) Embryo
    b) Leaf tissue
    c) Stigma
    d) Pollen grain

    2. In which one pair both the plants can be vegetatively propagated by leaf pieces
    a) Bryophyllum and Kalanchoe
    b) Chrysanthemum and Agave
    c) Agave and Kalanchoe
    d) Asparaus and Bryophyllum

  • 2. Sexual Reproduction in Flowering Plants - Quiz

    1. Nuclear endosperm has
    a) Every nuclear division followed by wall formation
    b) Initially free-nuclear division followed by wall formation
    c) First division followed by wall formation and other free nuclear
    d) None of the above

    2. An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is
    a) Anatropous
    b) Orthotropous
    c) Hemitropous
    d) Campylotropous

  • 3. Human Reproduction - Quiz

    1. Which one of the following statements about human sperm is correct
    a) Acrosome serves no particular function
    b) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization
    c) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
    d) Acrosome serves as a sensory structure leading the sperm towards to ovum

    2. Which one of the following statements is false in respect of viability of mammalian sperm
    a) Sperm is viable for only up to 24 hours
    b) Survival of sperm depends on the pH of the madium and is more active in alkalin medium
    c) Viability of sperm is detemined by its motility
    d) Sperms must be concentrated in a thick suspnsion

  • 4. Reproductive Health - Quiz

    1. Which one of the following correctly matches a sexually transmitted disease with its pathogen
    a) Urethritis - Bacillus anthracis
    b) Soft - Bacillus brevis
    c) Syphillis - Treponema pallidum
    d) Gonorrhoea - Entamoeba histolytica

    2. The study of human population statistically is known as
    a) Chromology
    b) Demography
    c) Population science
    d) Sinography

  • 5. Principles of Inheritance and Variation - Quiz

    1. Mating among close relations is referred
    a) Permanenet marriage
    b) Line breeding
    c) Inbreeding
    d) Cross breeding

    2. A colour blind man the daughter of a colour person. Then in their progeny
    a) None of their daughters are colour blind
    b) All the sons are colour blind
    c) All the daughter are colour blind
    d) Half of their sons are colour blind

  • 6. Molecular Basis of Inheritance - Quiz

    1. DNA fingerprinting method is very useful for
    a) DNA tests for identity and relationships
    b) Forensic studies
    c) Polymorphism
    d) All of the above

    2. Which RNA carries information from DNA in protein synthesis
    a) s-RNA
    b) t-RNA
    c) r-RNA
    d) m-RNA

  • 7. Evolution - Quiz

    1. The wings of an insect and a bat exhabit
    a) Homology
    b) Analogy
    c) Atavism
    d) Connecting link

    2. Haeckals theory of recapitulation (Biogenetic law) means that
    a) All organisms start as an egg
    b) Life history of an animal reflects its evolutionary history
    c) Progeny of an organism resembles its parents
    d) Body parts one lost are regenerated

  • 8. Human Health and Disease - Quiz

    1. Which one of the following statements is correct with respect to immunity
    a) Preformed antibodies need to be injected to treat the bite by a viper snake
    b) The antibodies against small pox pathogen are produced by T-lymphocytes
    c) Antibodies are protein molecules, each of which has four light chains
    d) Rejection of a kidney graft is the function of B-lymphocytes

    2. The antibodies are
    a) Lipids
    b) Germs
    c) Proteins
    d) Carbohydrates

  • 9. Strategies for Enhancement in Food Production - Quiz

    1. Desired improvement variety of economically useful crops are raised by
    a) Natural selection
    b) Hybridization
    c) Mutation
    d) Biofertilizer

    2. Agriculture was originated in mesolithic age about
    a) 2000 years ago
    b) 3000-10000 years ago
    c) 7000-13000 tears ago
    d) 20000-25000 years ago

  • 10. Microbes in Human Welfare - Quiz

    1. Monascus purpireus is a yeast used commercially in the production of
    a) Ethanol
    b) Streptokinase for removing clots from the blood vessels
    c) Citric acid
    d) Blood cholesterol lowering stating

    2. Streptomycin is produced by or from which micro-organism streptomycin is prepared
    a) Streptomyces venezuelae
    b) Streptomyces griseus
    c) Streptomyces scoleus
    d) Streptomyces fradie

  • 11. Biotechnology : Principles and Processes - Quiz

    1. In recombination vector used is
    a) Protein
    b) Agrobacterium tumefaciens
    c) Nucleic acid
    d) Cellulose

    2. Main objective of production/use of herbicine resistant GM crops is to
    a) Encourage eco-friendly herbicides
    b) Reduce herbicide accumulation in food articles for health saftery
    c) Eliminate weeds from the field without the use of manual labour
    d) Eliminate weeds from the field without the use of herbicides

  • 12. Biotechnology and its Applications - Quiz

    1. Trade name of genetically engineered insulin is
    a) Anulin
    b) Beta insulin
    c) Humilin
    d) Gilberts insulin

    2. Some of the steps involved in the production of humulin are given below. Choose the correct sequence
    (i) Synthesis of gene (DNA) for human insulin artificially
    (ii) Culturing recombinant E.coli in bioreactors
    (iii) Purification of humulin
    (iv) Insertion of human insulin gene into plasmid
    (v) Introduction of recombinant plasmid into E. coli
    (vi) Extraction of recombinant gene product from E.coli
    a) (ii), (i), (iv), (iii), (v), (vi)
    b) (i), (iii), (v), (vi), (ii), (iv)
    c) (i), (iv),(v), (ii),(vi), (iii)
    d) (iii), (v), (ii), (i), (vi), (iv)

  • 13. Organisms and Populations - Quiz

    1. Pneumatophore roots are present in
    a) Mesophytes
    b) Xerophytes
    c) Hydrophytes
    d) Halophytes

    2. The concept that "population tends to increase geometrically while food supply increases arithmetically" was put forward by
    a) Thomas Malthus
    b) Adam Smith
    c) Stuart Mil
    d) Charles Darwin

  • 14. Ecosystem - Quiz

    1. The biomass available for consumption by the herbivores and the decomposers is called
    a) Gross primary productivity
    b) Net primary productivity
    c) Secondary productivity
    d) Standing crop

    2. Benthic organism are affected most by
    a) Light reaching the forest floor
    b) Surface turbulence of water
    c) Sediment characteristics of aquatic ecosystem
    d) Water-holding capacity of soil

  • 15. Biodiversity and Conservation - Quiz

    1. Which of the following animal has become almost extinct in India
    a) wolf
    b) Rhinoceros
    c) Hippopotamus
    d) Cheetah

    2. The most important human activity leading to the extinction of wildlife is
    a) Alteration and destruction of the natural habitats
    b) Hunting for commercially valuable wild life products
    c) Pollution of air and water
    d) Introduction of alien species

  • 16. Environmental Issues - Quiz

    1. The soil pollutants that affect the food chain and food web by killing micro organisms and plants are
    a) Pathogens
    b) Chemical fertilisers
    c) Agricultural waste
    d) Pesticides

    2. In coming years, skin related disorders will be more common due to
    a) Pollutant in air
    b) Use of detergents
    c) Water pollution
    d) Depletion of ozone layer

  • 17. Common Human Diseases - Quiz

    1. Malaria is spread by
    a) Male culex
    b) Female culex
    c) Male anopheles
    d) Female anopheles

    2. A metastatic cancerous tumor is termed sarcoma if the disorder is in
    a) Immune system
    b) Epithelial cells
    c) Fibroblasts
    d) Circulatory system

  • 18. Animal Husbandry - Quiz

    1. The world highly prized wool yielding paschima breed is
    a) Sheep
    b) Goat
    c) Sgoat-sheep
    d) Kashmir sheep - Afgan sheep cross

    2. Domestication of honeybess is called
    a) Sericulture
    b) Apiculture
    c) Tissue culture
    d) Pisciculture

  • 19. Bioenergy - Quiz

    1. If wheat field is inoculated with Rhizobium
    a) Soil will become nitrogen rich
    b) No effect on soil nitrogen
    c) Soil will be depleted of nitrogen
    d) Soil will become rich in calcium

    2. Yield of paddy field can be increased by application of
    a) Iron bacteria
    b) Nostoc/Anabaena
    c) Archarbacteria
    d) Symbiotic bacteria

  • 20. Conservation of Natural Resources - Quiz

    1. More than 70% of worlds freshwater is contained in
    a) Polar ice
    b) Glaciers and mountains
    c) Antartica
    d) Greenlands

    2. National Enviromental Engineering Research Institute (NEERI) is situated at
    a) New Delhi
    b) Nagpur
    c) Bhopal
    d) Baroda

  • 21. Drug Addiction, Mental & Community Health - Quiz

    1. Dilation of blood vessels, increase in fat synthesis,low blood sugar and inflammation of stomch are due to the consumption of
    a) Tobacco
    b) Drug addiction
    c) Alcohol
    d) Tobacco and drug addiction 

    2. Cyclospiorin A an immunosuppressive drug is produced by
    a) Aspergillus niger
    b) Manascus purpureus
    c) Penicillium notatum
    d) Trichoderma polysporum

  • 22. Biome and Biogeochemical Cycle - Quiz

    1. In desert grasslands, which type of animals are relatively more abundant
    a) Diurnal
    b) Arboreal
    c) Aquatic
    d) Fossorial

    2. Sal and teak is the dominal species in which of the following forests
    a) Tropical dry decidious forests
    b) Temperate decidious forest
    c) Temperate rain forest
    d) None of the above