Asexual/sexual, human, contraceptionPractice Questions & MCQs
Practice Asexual/sexual, human, contraception questions from How do Organisms Reproduce? (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Asexual/sexual, human, contraceptionQuiz - Solve & Score
Q1. Which of the following is NOT a sexually transmitted infection (STI)?
- A.Beri-beri
- B.Gonorrhoea
- C.Syphilis
- D.AIDS
Answer: A. Beri-beri
That leaves only option A). Confirm with the chapter rule: Beri-beri is a deficiency disease caused by lack of vitamin B1 (thiamine), not a sexually transmitted infection. Gonorrhoea (bacterial), syphilis (bacterial) and AIDS (viral, HIV) are all STIs spread chiefly through sexual contact (biology, chapter 'How do Organisms Reproduce?'). Answer: A) Beri-beri.
Q2. Which of the following sequences correctly describes the path of a sperm during fertilisation in the human female?
- A.Vagina → cervix → uterus → fallopian tube → ovum
- B.Vagina → uterus → cervix → fallopian tube → ovum
- C.Cervix → vagina → fallopian tube → uterus → ovum
- D.Fallopian tube → uterus → cervix → vagina → ovum
Answer: A. Vagina → cervix → uterus → fallopian tube → ovum
Going back to the NCERT chapter, Sperm deposited in the upper vagina ascend through the cervix, enter the uterine cavity, swim into the fallopian tubes and meet the ovum near the ampullary-isthmic junction. Reversing any part of this anatomical path is wrong. The cervix is the narrow lower opening of the uterus into the vagina, so cervix-then-vagina is biologically impossible for ascending sperm. Hence the answer is A) Vagina → cervix → uterus → fallopian tube → ovum.
Q3. Which of the following is the correct route taken by a sperm from where it is produced to the urethra in a human male?
- A.Seminiferous tubule → Epididymis → Vas deferens → Urethra
- B.Vas deferens → Epididymis → Seminiferous tubule → Urethra
- C.Epididymis → Seminiferous tubule → Urethra → Vas deferens
- D.Seminiferous tubule → Vas deferens → Epididymis → Urethra
Answer: A. Seminiferous tubule → Epididymis → Vas deferens → Urethra
Concept involved: Sperms are produced in the seminiferous tubules of the testis, then mature and are stored in the epididymis. From the epididymis they pass through the vas deferens, join the urethra at the level of the prostate, and are ejaculated. Reversing any of these is anatomically wrong. Hence the correct option is A) Seminiferous tubule → Epididymis → Vas deferens → Urethra.
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