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12th Standard Biology English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - 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. Colostrum is rich in

    (a)

    Ig E

    (b)

    Ig A

    (c)

    Ig D

    (d)

    Ig M

  2. A contraceptive pill prevents ovulation by

    (a)

    blocking fallopian tube

    (b)

    inhibiting release of FSH and LH

    (c)

    stimulating release of FSH and LH

    (d)

    causing immediate degeneration of released ovum.

  3. Which of the following phenotypes is not possible in the progeny of the parental genotypic combination IAIO X IAIB?

    (a)

    AB

    (b)

    O

    (c)

    A

    (d)

    B

  4. ZW-ZZ system of sex determination occurs in

    (a)

    Fishes

    (b)

    Reptiles

    (c)

    Birds

    (d)

    All of these

  5. Which of the following statements is not true about DNA replication in eukaryotes?

    (a)

    Replication begins at a single origin of replication.

    (b)

    Replication is bidirectional from the origins.

    (c)

    Replication occurs at about 1 million base pairs per minute

    (d)

    There are numerous different bacterial chromosomes, with replication ocurring in each at the same time.

  6. The age of fossils can be determined by

    (a)

    electron microscope

    (b)

    weighing the fossils

    (c)

    carbon dating

    (d)

    analysis of bones

  7. Spread of cancerous cells to distant sites is termed as

    (a)

    Metastasis

    (b)

    Oncogenes

    (c)

    Proto-oncogenes

    (d)

    Malignant neoplasm

  8. The purpose of biological treatment of waste water is to _______

    (a)

    Reduce BOD

    (b)

    Increase BOD

    (c)

    Reduce sedimentation

    (d)

    Increase sedimentation

  9. Recombinant Factor VIII is produced in the ______ cells of the Chinese Hamster

    (a)

    Liver cells

    (b)

    blood cells

    (c)

    ovarian cells

    (d)

    brain cells.

  10. Pollen tube was discovered by

    (a)

    J.G.Kolreuter

    (b)

    G.B.Amici

    (c)

    E.Strasburger

    (d)

    E.Hanning

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TN 12th Standard Biology free Online practice tests

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