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

12th Standard

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Biology

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

    Multiple Choice Questions

    15 x 1 = 15
  1. Colostrum is rich in

    (a)

    Ig E

    (b)

    Ig A

    (c)

    Ig D

    (d)

    Ig M

  2. The Androgen Binding Protein (ABP) is produced by

    (a)

    Leydig cells

    (b)

    Hypothalamus

    (c)

    Sertoli cells

    (d)

    Pituitary gland

  3. A – Head of the sperm consists of acrosome and mitochondria.
    R – Acrosome contains spiral rows of mitochondria.

    (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

  4. ____ is not linked to male reproductive system.

    (a)

    Prostate gland

    (b)

    Corpus albicans

    (c)

    Cowper's gland

    (d)

    bulbourethral glands

  5. ______ cells nourish the sperms.

    (a)

    Leydig cells

    (b)

    Interstitial cells

    (c)

    Spermatogonic cells

    (d)

    Sertoli cells

  6. Assertion (A): In scrotum, the temperature is maintained 2 - 3°C lower than body temperature.
    Reason (R): Reduced temperature results in efficient sperm production

    (a)

    R explains A.

    (b)

    A is right R is wrong.

    (c)

    A and R are right. R does not explains A

    (d)

    Both A and R are wrong

  7. Assertion (A): Cervix is common site of ectopic pregnancies
    Reason (R): Implantation of fertilized ovum outside uterus

    (a)

    A is wrong, R is right.

    (b)

    A is right, R is wrong

    (c)

    A and R are right. R does not explains A.

    (d)

    Both A and R are wrong.

  8. An adult male produces an average of __________________ sperms per day

    (a)

    200 million

    (b)

    300 million

    (c)

    300 million

    (d)

    120 million

  9. Statement (1): During spermiation, the sperms are released into the cavity of seminiferous tubule.
    Statement (2): During spermiogenesis, the spermatids get mature into sperms.

    (a)

    Statement 1 is correct; statement 2 is incorrect

    (b)

    Statement 1 is incorrect; statement 2 is correct

    (c)

    Both the statements 1 and 2 are correct.

    (d)

    Both the statements 1 and 2 are incorrect

  10. Identify the mismatched pair

    (a)

    Castration - Orchidectomy

    (b)

    Spermiogenesis - Release of sperms into the cavity of seminiferous tubule

    (c)

    Ovulation - Release of egg from ovary

    (d)

    Capacitation - Process enabling the sperm to penetrate the eg

  11. Identify the given figure and select the correct option representing X,Y and Z

    (a)
    X Y Z
    Nucleus Acrosome Mitochondria
    (b)
    X Y Z
    Acrosome Nucleus Mitochondria
    (c)
    X Y Z
    Mitochondria Acrosome Nucleus
    (d)
    X Y Z
    Nucleus Acrosome Mitochondria
  12. What is the role of fimbriae?

    (a)

    Secretion of oestrogen and prolactin.

    (b)

    Helps in the collection of the ovum after ovulation

    (c)

    Attaches the ovary to the abdominal cavity.

    (d)

    Cormects oviduct with ovary

  13. Identify the hormone which is produced only during the time of pregnancy

    (a)

    Relaxin

    (b)

    Oxytocin

    (c)

    Progesterone

    (d)

    Cortisol

  14. Which of the following is not belonging to the accessory glands of the male reproductive system?

    (a)

    Prostate gland

    (b)

    Corpus albicans

    (c)

    Cowper's gland

    (d)

    Bulbourethral glands

  15. Why is colostrum recommended to new born baby?

    (a)

    It contains higher amount of carbohydrates

    (b)

    It contains higher amount of fats

    (c)

    It contains Ig A antibodies

    (d)

    It contains Ig E antibodies

  16. 2 Marks

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

  18. What is colostrum? Write its significance.

  19. Draw a labeled sketch of a spermatozoan.

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

  21. What is the significance of epididymis?

  22. What is endometrium?

  23. What do you mean by 'Sperm lysin'? Mention its function.

  24. Mention the hormones secreted by the placenta during pregnancy.

  25. Define parturition and labour.

  26. Describe the structure of the head of a human sperm.

  27. 3 Marks

    10 x 3 = 30
  28. Mention the importance of the position of the testes in humans.

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

  30. What is the role of FSH & LH in spermatogenesis?

  31. What is corpus luteum?

  32. Why does menstrual flow occur?

  33. What is acrosome reaction?

  34. What is the significance of allantois?

  35. Explain gastrulation.

  36. Define lactation And explain its hormonal background.

  37. Suggest few hygiene tips to face healthy and happy menses.

  38. 5 Marks

    7 x 5 = 35
  39. Identify the given image and label its parts marked as a, b, c and d

  40. Differentiate Spermatogenesis and oogenesis.

  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. Write a note on embryonic membranes

  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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