Every Book Back multiple-choice question from Reproductive Health (12th Standard Zoology, Samacheer Kalvi) — each with the correct option highlighted and a clear, worked explanation. Free to read in English and Tamil.
Q1
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea and trichomoniasis?
- A. Gonorrhoea is a STD whereas others are not.
- B. Trichomoniasis is a viral disease whereas others are bacterial.
- C. HIV is a pathogen whereas others are diseases.Correct
- D. Hepatitis B is eradicated completely whereas others are not.
Explanation. HIV is the virus that causes AIDS, making it a pathogen, whereas hepatitis B, gonorrhoea, and trichomoniasis represent the resulting diseases of their respective infections.
Q2
Which one of the following groups includes sexually transmitted diseases caused by bacteria only?
- A. Syphilis, gonorrhoea and candidiasis
- B. Syphilis, chlamydiasis and gonorrhoeaCorrect
- C. Syphilis, gonorrhoea and trichomoniasis
- D. Syphilis, trichomoniasis and pediculosis
Explanation. Syphilis, chlamydiasis, and gonorrhoea are all sexually transmitted infections caused by bacterial pathogens, specifically Treponema pallidum, Chlamydia trachomatis, and Neisseria gonorrhoeae.
Q3
Identify the correct statements from the following
- A. Chlamydiasis is a viral disease.
- B. Gonorrhoea is caused by a spirochaete bacterium, Treponema palladium.
- C. The incubation period for syphilis is 2 to 14 days in males and 7 to 21 days in females.
- D. Both syphilis and gonorrhoea are easily cured with antibiotics.Correct
Explanation. Syphilis and gonorrhoea are bacterial sexually transmitted infections that can be effectively treated and cured using appropriate antibiotic therapies, unlike viral infections.
Q4
A contraceptive pill prevents ovulation by
- A. blocking fallopian tube
- B. inhibiting release of FSH and LHCorrect
- C. stimulating release of FSH and LH
- D. causing immediate degeneration of released ovum
Explanation. Hormonal contraceptive pills contain synthetic estrogen and progesterone which inhibit the secretion of follicle-stimulating hormone and luteinizing hormone from the pituitary gland, preventing follicle development and ovulation.
Q5
The approach which does not give the defined action of contraceptive is
- A. Hormonal contraceptive - Prevents entry of sperms, prevent ovulation and fertilization
- B. Vasectomy - Prevents spermatogenesisCorrect
- C. Barrier method - Prevents fertilization
- D. Intra uterine device - Increases phagocytosis of sperms, suppresses sperm motility and fertilizing capacity of sperms
Explanation. Vasectomy is a surgical sterilization method for males that cuts and ties the vas deferens to prevent sperm transport, but it does not affect spermatogenesis in the testes.
Q6
Read the given statements and select the correct option.
Statement 1: Diaphragms, cervical caps and vaults are made of rubber and are inserted into the female reproductive tract to cover the cervix before coitus.
Statement 2: They are chemical barriers of conception and are reusable.
- A. Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.
- B. Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.
- C. Statement 1 is correct but statement 2 is incorrect.Correct
- D. Both statements 1 and 2 are incorrect.
Explanation. Diaphragms, cervical caps, and vaults are mechanical barrier methods made of rubber that block sperm entry, not chemical barriers, making the second statement incorrect.
Q7
Match column I with column II and select the correct option from the codes given below.
Column I:
A. Copper releasing IUD
B. Hormone releasing IUD
C. Non medicated IUD
D. Mini pills
Column II:
(i) LNG-20
(ii) Lippes loop
(iii) Saheli
(iv) Multiload-375
- A. A-(iv), B-(ii), C-(i), D-(iii)
- B. A-(iv), B-(i), C-(iii), D-(ii)
- C. A-(i), B-(iv), C-(ii), D-(iii)
- D. A-(iv), B-(i), C-(ii), D-(iii)Correct
Explanation. Multiload-375 is a copper-releasing IUD, LNG-20 is a hormone-releasing IUD, Lippes loop is a non-medicated IUD, and Saheli is a non-steroidal oral contraceptive pill.
Q8
Select the incorrect action of hormonal contraceptive pills from the following
- A. Inhibition of spermatogenesis.Correct
- B. Inhibition of ovulation.
- C. Changes in cervical mucus impairing its ability to allow passage and transport of sperms.
- D. Alteration in uterine endometrium to make it unsuitable for implantation.
Explanation. Hormonal contraceptive pills are female contraceptives that prevent ovulation, alter cervical mucus, and modify the endometrium; they do not play any role in inhibiting male spermatogenesis.
About these Reproductive Health questions
These are the Book Back multiple-choice questions for Reproductive Health from the Tamil Nadu State Board (Samacheer Kalvi) 12th Standard Zoology syllabus. Each question shows the correct option and an original, step-by-step explanation so you understand the method, not just the answer. Use the answer key above to jump to any question, then take the practice test to check yourself under exam-like conditions.
Frequently asked questions
How many MCQs are there in Reproductive Health?
This chapter has 8 book-back multiple-choice questions, each with the correct answer and a step-by-step explanation.
Are these 12th Standard Zoology MCQs free to practise online?
Yes. Every question, answer and explanation here is free, and you can also take them as a timed practice test.
Where can I find the Reproductive Health book-back answers?
The correct option for each question is highlighted on this page with a worked explanation, plus a quick answer-key summary at the top.
