Class/Course - Class XII

Subject - Biology

Total Number of Question/s - 4195


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  • 1. Reproduction in Organisms - Quiz

    1. What is common between vegetative reproduction and Apomixis
    a) Both occur round the year
    b) Both produces progeny identical to the parent
    c) Both are applicable to only dicot plants
    d) Both bypass the flowering phase

    2. Match the following and choose the correct combination from the options given
                  Column  I                         Column  II
                 (Organism)                   (Approximate life span)
    A. Butterfly 1. 60 years
    B. Crow 2. 140 years
    C. Parrot 3. 15 years
    D. Crocodile 4. 1-2 weeks

    a) A-1; B-2; C-3; D-4
    b) A-4; B-3; C-1; D-2
    c) A-2; B-3; C-4; D-1
    d) A-3; B-2; C-1; D-4
    e) A-4; B-3; C-2; D-1

  • 2. Sexual Reproduction in Flowering Plants - Quiz

    1. Megasporangium is equivalent to
    a) Ovule
    b) Embryo sac
    c) Fruit
    d) Nucellus

    2. The ovary after ferilization is converted into
    a) Embryo
    b) Endosperm
    c) Fruit
    d) Seed

  • 3. Human Reproduction - Quiz

    1. Periblastula is found in
    a) Man
    b) Insects
    c) Sycon
    d) Reptiles

    2. If both ovaries are removed from a rat, then which hormone is decreased in blood
    a) Oxytocin
    b) Oestrogen
    c) Prolactin
    d) Gonadotrophic

  • 4. Reproductive Health - Quiz

    1. The techinque called gamete intrafallopian transfer (GIFT) is recommended for those females
    a) Whose cervical canal is too narrow to allow passage for the sperms
    b) Who can not provide suitable environment for fertilization
    c) Who can not produce an ovum
    d) Who can not retain the foetus inside uterus

    2. Amniocentesis is a process to
    a) Determine any disease in heart
    b) Determine any hereditary disease in the embryo
    c) Known about the disease of brain
    d) All of these

  • 5. Principles of Inheritance and Variation - Quiz

    1. The genetic defect-adenosine deaminase (ADA) deficiency may be cured permanently by
    a) Periodic infusion of genetically engineered lumphocytes having functional ADA cDNA
    b) Administering adenosine deaminase activators
    c) Introducing bone marrow cells producing ADA into cells at early embryonic stages
    d) Enzyme replacement therapy

    2. Polytyene chromosomes are formed by
    a) Endoreduplication of chromosomes
    b) Somatic pairing of homologous chromosomes
    c) Somatic pairing of non-homologous chromosomes
    d) Germinal pairing of non-homologous chromosomes

  • 6. Molecular Basis of Inheritance - Quiz

    1. DNA polymerase helps in
    a) Joining bits of DNA
    b) Splitting of separation of two strands of DNA
    c) Renaturation
    d) Denaturation

    2. Who discovered "Reverse transcription"
    a) Watson and Crick
    b) Beadle and Tatum
    c) Temin and Baltimore
    d) Khorana

  • 7. Evolution - Quiz

    1. There are two opposite views about origin of modern man. According to one view Homo errectus in Asia were the ancestors of modern man., A study of variation of DNA however suggested African origin of modern man. What kind of observation on DNA variation could suggest this
    a) Greater cariation in Asia than in Africa
    b) Greater variation in Africa than in Asia
    c) Similar variation in Africa and Asia
    d) Variation only in Asia no variation in Africa

    2. Among the human ancestors the brain size was more then 1000CC in
    a) Homo neanderthalensis
    b) Homo erectus
    c) Ramapithecus
    d) Homo bablis

  • 8. Human Health and Disease - Quiz

    1. If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence
    a) Serum albumins
    b) Serum globulins
    c) Fibrinogen in the plasma
    d) Haemocytes

    2. Antibidy formation and immunity production is done by a protein called globulin present in the
    a) Stroma of RBC
    b) Haemoglobin of RBC
    c) Plasma
    d) Blood platelets

  • 9. Strategies for Enhancement in Food Production - Quiz

    1. Which of the following is not used for crop improvement
    a) Inbreeding
    b) Introduction
    c) Hybridization
    d) Mutations

    2. In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
    a) n = 7 and x = 21
    b) n = 21 and x = 21
    c) n = 21 and x = 14
    d) n = 21 and x = 7

  • 10. Microbes in Human Welfare - Quiz

    1. What gases are produced in anaerobic sludge digesters
    a) methane, hydrogen sulphide and O2
    b) Hydrogen sulphide and CO2
    c) Methane and CO2 only
    d) Methane, hydrogen sulphide and CO2

    2. Dough kept overnight in warm weather becomes aoft and spondy because of
    a) Cohesion
    b) Osmosis
    c) Absorption of carbon dioxide from atmosphere
    d) Fermentation

  • 11. Biotechnology : Principles and Processes - Quiz

    1. Which one of the following is used as vector for cloning genes into higher organisms
    a) Retrovirus
    b) Baculovirus
    c) Salmonella typhimurium
    d) Rhizopus nigricans

    2. In genetic engineering a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (AD) in this regard and select the correct option about which one or more of these can be used as a vector/vectors
    Statements (A) A bacterium (B) Plasmid
    (C) Plasmodium (D) Bacteriophage
    a) (A), (B) and (D) only
    b) (A) only
    c) (A) and (C) only
    d) (B) and (D) only

  • 12. Biotechnology and its Applications - Quiz

    1. Which one of the following is now being commericially produced by bitechnological procedures
    a) Nicotine
    b) Morphine
    c) Quinine
    d) Insulin

    2. First cloned animal is
    a) Dog
    b) Molly
    c) Dolly sheep
    d) Polly sheep

  • 13. Organisms and Populations - Quiz

    1. Identify the correct matched pair
    a) Basal convention - Biodiversity conservation
    b) Kyoto protocol - Climatic change
    c) Montreal protocol - Global warming
    d) Ramsar convention - Ground water pollution

    2. Which of the following soil is transported by wind
    a) Alluvial
    b) Aerial
    c) Eolian
    d) Glacial

  • 14. Ecosystem - Quiz

    1. Which ecosystem shows maximum genetic diversity
    a) Coniferous forests
    b) Tropical rain forests
    c) Subtropical forests
    d) Temperate

    2. Pyramid of energy is
    a) Upright
    b) Inverted
    c) Oblique
    d) None of these

  • 15. Biodiversity and Conservation - Quiz

    1. Red data book provides data on
    a) Red flowered plants
    b) Re coloured October
    c) Endangered plansta and animals
    d) Red eyed birds

    2. In India, we find mangoes with  different flavours, colours, fibre content, sugar content and even shelf life. The large variation is ion account of
    a) Species diversity
    b) Induced mutations
    c) Genetic diverdity
    d) Hybridization

  • 16. Environmental Issues - Quiz

    1. Which of the following organism is likely to have more concentration of D.D.T. in its body
    a) Herbivores
    b) Carnivores
    c) Top carnivorus
    d) Primary producers

    2. The domestic sewage in large cities 
    a) Has a high BOD as it contains both aerobic and anaerobic bacteria
    b) Is processes by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs)
    c) When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
    d) Has very high amounts of suspended solids and dissolve salts

  • 17. Common Human Diseases - Quiz

    1. Which of the following is not correct matched
    a) Aedes aegypti - yellow fever
    b) Anopheles culifacies - Leishmaniasis
    c) Glossina palpalsis - sleeping sickness
    d) Culex pipiens - filariasis

    2. Which one of the following contains bacterial diseases
    a) Cholera, typhoid, pneumonia
    b) Malaria, AIDS, chloera, mumps
    c) Typhoid, tuberclosis, influenza, mumps
    d) Diabetes, malaria, syphilis, mumps

  • 18. Animal Husbandry - Quiz

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

    2. Earliest animal domesticated by primitive man was
    a) Goat
    b) Dog
    c) Horse
    d) Cat

  • 19. Bioenergy - Quiz

    1. In gobar gas, the maximum amount is that of
    a) Butane
    b) Methane
    c) Propane
    d) Carbon dioxide

    2. Most famous nitrogen fixing bacterium biofertilizer is
    a) Nitrobacter
    b) Nitrosomonas
    c) Nitrococcus
    d) Rhizobium

  • 20. Conservation of Natural Resources - Quiz

    1. The government of India in 1980 has introduced a concept to work closely with the local communities for protecting and managing forests . The concept is
    a) Forest Research Institutes
    b) Pannel of local communities for forest managrment
    c) Joint Forest Management
    d) Jhum cultivation

    2. Fertility of soil is measured by ability to
    a) Retain nutrients
    b) Hold organic materials
    c) Hold water
    d) Spport life

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

    1. Smoking addiction is harmful because it produces polycyclic aromatic hydrocarbons, which cause
    a) Reduction in oxygen transport
    b) Increase in blood pressure
    c) Cancer (Lung)
    d) Retardation of growth of foetus

    2. Which one of the following is the correct statement regarding the particular psychotropic drug specified
    a) Morphine leads delusion and disturbed emotions
    b) Barbiturates cause relaxation and temporary euphoria
    c) Hashish causes after thought perceptions and hallucinations
    d) Opium stimulates nervous system and causes hallucinations

  • 22. Biome and Biogeochemical Cycle - Quiz

    1. Which part of the would has a high diversity of organisms
    a) Grasslands
    b) Savannahs
    c) Decidious forests
    d) Tropical rain forests

    2. Tropical ran forests are found in
    a) Andamans
    b) Bihar
    c) Himachal; pradesh
    d) Jammu and Kashmir