New ! Biology MCQ Practise Tests

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

12th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 00:10:00 Hrs
Total Marks : 10
    Answer all the questions
    10 x 1 = 10
  1. During favourable conditions ______ shows multiple fission.

    (a)

    Plasmodium

    (b)

    Amoeba

    (c)

    Planaria

    (d)

    Euglena

  2. Testosterone is secreted by ____

    (a)

    spermatocytes

    (b)

    sperm

    (c)

    polar bodies

    (d)

    leydig cells

  3. Assertion (A): IUD's are inserted in the ovary.
    Reason (R): IUD's Increases phagocytosis of the sperm.

    (a)

    Both A and R are correct

    (b)

    Both A and R are incorrect

    (c)

    A is correct R is incorrect

    (d)

    A is incorrect R is correct

  4. The ZW - ZZ type of sex determination is seen ________.

    (a)

    Butterflies

    (b)

    Drosophila

    (c)

    Gypsy moth

    (d)

    Human being

  5. In gypsy moth we find _________ type of sex determination.

    (a)

    ZW - ZZ

    (b)

    XX - XY

    (c)

    XX - XO

    (d)

    ZO - ZZ

  6. Identify the proper dominance hierarchy.

    (a)

    IA=IO>IB

    (b)

    IA=IB>O

    (c)

    IO=IB>IA

    (d)

    IB=IA>O

  7. Chromosomes were first observed by ________.

    (a)

    Miescher

    (b)

    Hofmeister

    (c)

    Avery

    (d)

    Griffith

  8. Wobble hypothesis ________.

    (a)

    proves that many tRNAs are. needed to transport specific amino acids

    (b)

    proves that the bases in tRNA need not match with mRNA

    (c)

    helps in economic usage of tRNA

    (d)

    proves that one tRNA can carry many amino acids

  9. Origin of egg laying mammal a occurred in ___________ period.

    (a)

    Jurassic

    (b)

    Carboniferous

    (c)

    Triassic

    (d)

    Cretaceous

  10. Darwin's finches in Galapagos islands and Australian Marsupials are the example of

    (a)

    Industrial mechanism

    (b)

    Reproductive isolation

    (c)

    Genetic recombination

    (d)

    Adaptive recombination

*****************************************

TN 12th Standard Biology free Online practice tests

Reviews & Comments about 12th Standard Biology English Medium Free Online Test Creative 1 Mark Questions

Write your Comment