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12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions - Part Two

12th Standard

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Biology

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  1. In the geom line gene therapy, the genes are introduced into the______

    (a)

    bone marrow cells

    (b)

    blood cells

    (c)

    sperms and eggs

    (d)

    skin cells

  2. Statement 1:ADA deficiency was the first disease treated by gene therapy.
    Statement 2: ADA is an autosomal recessive metabolic disorder

    (a)

    Statement 1 is true. Statement 2 is false

    (b)

    Satement 1 is false. Statement 2 is true

    (c)

    Both statements 1 and 2 are true 

    (d)

    Both statements 1 and 2 are false

  3. Cryopreservation of gametes of threatened species in viable and fertile condition can be referred to as

    (a)

    In situ conservation of biodiversity

    (b)

    Advanced ex situ conservation of biodiversity

    (c)

    In situ conservation by sacred groves

    (d)

    In situ cryo-conservation of biodiversity

  4. DB is a standard abbreviation  used for the quantitative expression of

    (a)

    The density of bacteria in a medium

    (b)

    A particular pollutant

    (c)

    The dominant bacillus in a culture

    (d)

    A certain pesticide

  5. Identify the incorrect statement.
    (i) EcoSan toilets is a sustainable way for handling human excreta by using dry composting toilets
    (ii) It reduces waste water generation
    (Ui) It is based on recovery and recycling of nutrients from excreta
    (iv) EcoSan toilets are used in several parts of India and Srilanka.

    (a)

    i and ii only

    (b)

    iii and iv only

    (c)

    all the above

    (d)

    none of the above

  6. Assertion (A): Zea mays is a monocotyledonous plant.
    Reason (R): Shield shaped cotyledon is called scutellum.

    (a)

    A is correct R is incorrect.

    (b)

    R explains A.

    (c)

    Both A and R are incorrect.

    (d)

    Both A and R are correct. R does not explain A.

  7. How many genetically different gametes are produced by a plant have genotype TtYyRr?

    (a)

    2

    (b)

    4

    (c)

    6

    (d)

    8

  8. Recombination frequency (RF) is equal to

    (a)

    \(\frac { No.ofoffsprings }{ No.ofrecombinants } \times 100\)

    (b)

    \(\frac { No.of\quad recombinants }{ No.ofparentalstrains } \times 100\)

    (c)

    \(\frac { No.ofrecombinants }{ No.ofoffsprings } \times 100\)

    (d)

    \(\frac { No.ofoffsprings }{ No.ofparentalstrains } \times 100\)

  9. Assertion (A): Social forestry refers to management of forests and afforestation on barren lands.
    Reason (R): Afforestation involves the cutting of trees.

    (a)

    A is correct R is incorrect.

    (b)

    A is incorrect R is correct.

    (c)

    R explains A.

    (d)

    Both A and R are incorrect.

  10. Match the common names of the given plant species with their respective binomial

    (A) Paddy (I) Vigna radiata
    (B) Lady's finger  (II) Titicum aestivum
    (C) Wheat  (III) Oryza sativa
    (D) Green gram (IV) Abelmoschus esculentus
    (a)

    A-iii, B-iv, C-ii and D-i 

    (b)

    A-ii, B-iii, C-i and D-iv

    (c)

    A - i, B - iii, C - iv and D - ii

    (d)

     A - i, B - ii, C - iv and D - iii

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