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12th Standard Bio-Zoology English Medium Human Reproduction Reduced Syllabus Important Questions 2021

12th Standard

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Biology

Time : 01:00:00 Hrs
Total Marks : 100

    Multiple Choice Questions

    15 x 1 = 15
  1. The mature sperms are stored in the

    (a)

    Seminiferous tubules

    (b)

    Vas deferens

    (c)

    Epididymis

    (d)

    Seminal vesicle

  2. The most important hormone in intiating and maintaining lactation after birth is

    (a)

    Oestrogen

    (b)

    FSH

    (c)

    Prolactin

    (d)

    Oxytocin

  3. Mammalian egg is

    (a)

    Mesolecithal and non cleidoic

    (b)

    Microlecithal and non cleidoic

    (c)

    Alecithal and non cleidoic

    (d)

    Alecithal and cleidoic

  4. The milk secreted by the mammary glands soon after child birth is called

    (a)

    Mucous

    (b)

    Colostrum

    (c)

    Lactose

    (d)

    Sucrose

  5. Colostrum is rich in

    (a)

    Ig E

    (b)

    Ig A

    (c)

    Ig D

    (d)

    Ig M

  6. Find the wrongly matched pair

    (a)

    Bleeding phase- fall in oestrogen and progesterone

    (b)

    Follicular phase-rise in oestrogen

    (c)

    Luteal phase - rise in FSH level

    (d)

    Ovulatory phase - LH surge

  7. A – In human male, testes are extra abdominal and lie in scrotal sacs.
    R – Scrotum acts as thermoregulator and keeps temperature lower by 2oC for normal sperm production
     

    (a)

    A and R are true, R is the correct explanation of A

    (b)

    A and R are true, R is not the correct explanation of A

    (c)

    A is true, R is false

    (d)

    Both A and R are false

  8. Identify the correct Sequence of reproductive events in human beings.

    (a)

    Insemination, implanatation Fertilization Parturition and Placetation

    (b)

    Implanatation Fertilization, Insemination,  Parturition and Placetation

    (c)

    Implanatation, Insemination, Fertilization, Parturition and Placetation

    (d)

    Insemination, Fertilization, Implanatation, Parturition and Placetation

  9. ____ is not linked to male reproductive system.

    (a)

    Prostate gland

    (b)

    Corpus albicans

    (c)

    Cowper's gland

    (d)

    bulbourethral glands

  10. ______ is popularly known as sperm lysin.

    (a)

    Inhibitin

    (b)

    Hyaluronidase

    (c)

    Androgen

    (d)

    Acrosome

  11. The whole process of spermatogenesis takes about ______ days.

    (a)

    25

    (b)

    42

    (c)

    64

    (d)

    72

  12. The term after birth refers to ______

    (a)

    Parturition

    (b)

    Lactation

    (c)

    Remains of placenta

    (d)

    Corpus albicans

  13. Attachment of blastocyst to the uterine wall is called ______

    (a)

    Implantation

    (b)

    Parturition

    (c)

    Insemination

    (d)

    gastrulation

  14. Identify the correct statement on 'inhibition'.

    (a)

    is produced by granulose cells in ovary and inhibits the secretion of FSH

    (b)

    is produced by granulose cells in ovary and inhibits the secretion of LH

    (c)

    is produced by nurse cells in testes and inhibits the secretion of LH

    (d)

    inhibits the secretion of LH, FSH and prolactin.

  15. Several hormones like heG, hPL, oestrogen and progesterone are produced by

    (a)

    ovary

    (b)

    placenta

    (c)

    fallopian tube

    (d)

    pituitary

  16. 2 Marks

    10 x 2 = 20
  17. Mention the differences between spermiogenesis and spermatogenesis

  18. Expand the acronyms
    a. FSH
    b. LH
    c. hCG
    d. hPL

  19. How is polyspermy avoided in humans?

  20. Draw a labeled sketch of a spermatozoan.

  21. Name the Cells noticed in the epithelial layer of Seminiferous tubules.

  22. Define Cleavage.

  23. What is Placentation?

  24. What is Parturition?

  25. Describe the location and shape ofthe uterus.

  26. What is orchidectomy?

  27. 3 Marks

    10 x 3 = 30
  28. What is inhibin? State its functions

  29. What is the composition of semen?

  30. Name the hormones produced from the placenta during pregnancy.

  31. Define gametogenesis.

  32. Describe the structure of the human ovum with a neat labelled diagram.

  33. What is the function of Sertoli cells?

  34. What is acrosome?

  35. What is menopause?

  36. In the diagram given below.

    (a) Label the parts and
    (b) Identify the name of the diagram.

  37. Write a note on hymen.

  38. 5 Marks

    7 x 5 = 35
  39. The following is the illustration of the sequence of ovarian events (a-i) in a human female.

    a) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents.
    b) Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.
    c) Explain the changes that occurs in the uterus simultaneously in anticipation.
    d) Write the difference between C and H.

  40. Describe the structure of a sperm.

  41. Explain the process of fertilization in human beings.

  42. Write a note a extra embryonic membranes.

  43. Explain the structure and function of mammary glands.

  44. Explain the process of oogenesis.

  45. Name the three primary germ layers of embryo. Also, mention any three organs or organ systems developing from each layer.

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