Biology, SSC-Punjab Class 10. This chapter is split into 26 topics and has
633 practice questions. The topics covered are listed below, followed by
10 free sample questions from the chapter.
Topics in this chapter
Gametogenesis and spermatogenesis26 questions
Integrated review: gametogenesis, hormones, and reproductive systems27 questions
10 sample questions with the correct answer and an explanation. Try to answer each one before reading the explanation.
Q1. Based on the chapter, what is the correct five-step order of fertilization?
A. The zygote forms before the sperm and egg membranes fuse
B. The acrosome releases enzymes before the sperm even reaches the egg region
C. Both nuclei fuse first, then the sperm nucleus enters the egg, then membranes fuse, then chemical signals attract sperm, then the acrosome releases enzymes
D. Sperms move towards the egg due to chemical signals, the acrosome releases enzymes to digest the egg's outer layers, sperm and egg membranes fuse, the sperm nucleus enters the egg, both nuclei fuse to form a zygote(correct answer)
Answer: D.The chapter's five-step process, in order, is: chemical signals attract sperm to the egg, the acrosome releases enzymes to digest the egg's outer layers, the sperm and egg membranes fuse, the sperm nucleus enters the egg, and both nuclei fuse to form a diploid zygote.
Q2. Based on the chapter, what is the correct hormonal signaling sequence, starting from the hypothalamus, that ultimately leads to testosterone production and sperm formation?
A. The testes release GnRH, which stimulates the hypothalamus to release LH and FSH
B. The hypothalamus releases GnRH, which stimulates the pituitary to release LH and FSH; LH stimulates testosterone production by the testes, and FSH (with testosterone) stimulates sperm production(correct answer)
C. LH is released first by the testes, which then signals the hypothalamus to begin puberty
D. FSH stimulates the hypothalamus to release GnRH, which then produces testosterone directly
Answer: B.The correct sequence per the chapter is: hypothalamus releases GnRH, which stimulates the pituitary to release LH and FSH; LH then stimulates testosterone production by the testes, while FSH (along with testosterone) stimulates sperm production.
Q3. Which of the following best summarizes the overall coordination of female reproductive hormones, combining the roles of all five hormones described in the chapter?
A. GnRH, LH, and FSH have no relationship to oestrogen or progesterone production
B. GnRH from the hypothalamus triggers pituitary release of LH and FSH; FSH stimulates follicle growth and oestrogen production, while LH triggers ovulation and progesterone production, together regulating puberty, the reproductive cycle, and pregnancy readiness(correct answer)
C. All five hormones are produced by the ovaries independently, with no hypothalamus or pituitary involvement
D. Oestrogen is the only hormone involved; the other four play no role
Answer: B.This combines the chapter's hormone cascade: GnRH (hypothalamus) triggers LH and FSH release (pituitary), with FSH driving follicle growth/oestrogen and LH driving ovulation/progesterone, together regulating female reproductive development and cycles.
Q4. Which of the following best explains why the chapter specifically notes that fertilization occurs in the Fallopian tubes rather than in the uterus?
A. The uterus is where the egg is produced, not the ovary
B. Sperm cannot travel through the Fallopian tubes
C. The egg never enters the Fallopian tube at all
D. The egg travels from the ovary through the Fallopian tube first, making it the location where sperm typically first meet the egg, before the fertilized egg moves on to implant in the uterus(correct answer)
Answer: D.Since the egg travels from the ovary through the Fallopian tube toward the uterus, and sperm travel upward to meet it, the Fallopian tube is where fertilization typically occurs before the resulting zygote continues to the uterus for implantation.
Q5. Considering the full chapter, which of the following correctly traces the hormonal and structural pathway from puberty onset to sperm delivery in males?
A. Sperm are formed in the prostate gland, not the testes
B. GnRH (hypothalamus) stimulates LH/FSH (pituitary), which stimulate testosterone production and sperm formation in the testes; testosterone also drives secondary sexual characteristics; mature sperm are stored in the epididymis, transported by the vas deferens, mixed with accessory gland fluids, and delivered via the urethra and penis(correct answer)
C. Oestrogen from the ovaries directly causes sperm formation in males
D. The uterus is the site of sperm production in males
Answer: B.This integrates several sections of the chapter: the hormonal cascade (GnRH, LH, FSH, testosterone) driving both spermatogenesis and secondary sexual characteristics, and the structural pathway of sperm through the epididymis, vas deferens, accessory glands, urethra, and penis.
Q6. Considering the full chapter, which of the following correctly traces the hormonal and structural pathway from ovulation to potential pregnancy in females?
A. Fertilization occurs in the vagina, not the Fallopian tube
B. The cervix is the site where eggs are produced
C. Testosterone directly triggers ovulation in females
D. LH (stimulated by GnRH via the pituitary) triggers ovulation from the ovary; the egg travels through the Fallopian tube, where fertilization may occur; progesterone (from the ovary after ovulation) prepares the uterus for implantation and helps maintain pregnancy(correct answer)
Answer: D.This integrates the chapter's hormonal cascade (GnRH, LH triggering ovulation) with the structural pathway (egg release from ovary, fertilization in the Fallopian tube, and progesterone's role in preparing the uterus for implantation and maintaining pregnancy).
Q7. A young person experiences delayed puberty with underdeveloped secondary sexual characteristics. A doctor suspects a problem in the hormone cascade described in the chapter. Which three hormones, common to the cascades in both sexes, might the doctor first investigate?
A. ADH, oxytocin, and GH
B. Thyroxine, calcitonin, and parathormone
C. GnRH, LH, and FSH(correct answer)
D. Insulin, glucagon, and cortisol
Answer: C.Since GnRH, LH, and FSH form the shared upstream hormonal cascade driving sex hormone production (testosterone or oestrogen/progesterone) and secondary sexual characteristic development in both sexes, these would be a logical starting point for investigating delayed puberty.
Q8. A couple is trying to conceive. Based on the full chapter, which combination of events must occur for natural fertilization and pregnancy to succeed?
A. The couple must rely solely on antiretroviral therapy
B. Sperm must be produced (spermatogenesis) and delivered via the male reproductive tract; an egg must be released (ovulation, triggered by LH) and be available in the Fallopian tube; fertilization must occur there to form a zygote; and progesterone must help prepare and maintain the uterus for implantation(correct answer)
C. Fertilization must occur in the vagina, and no hormones are involved
D. Only sperm production is needed; no egg or hormone involvement is necessary
Answer: B.This integrates multiple chapter sections: spermatogenesis and sperm delivery (male system), ovulation triggered by LH and egg availability in the Fallopian tube (female system), fertilization forming a zygote, and progesterone's role in preparing/maintaining the uterus for implantation.
Q9. Which of the following correctly identifies why understanding fertilization's acrosome step (Section 6.1) is relevant to understanding infertility issues discussed generally in relation to STDs (Section 6.4)?
A. The acrosome reaction is discussed only in the context of STDs, not fertilization
B. The acrosome reaction and STDs are entirely unrelated topics with no possible connection
C. Since untreated STDs can cause reproductive organ damage, they could disrupt normal fertilization processes such as the acrosome reaction, potentially contributing to infertility(correct answer)
D. STDs directly strengthen the acrosome reaction, improving fertility
Answer: C.Since the chapter links untreated STDs to reproductive organ damage and infertility, and fertilization depends on normal processes like the acrosome reaction, damage from STDs could plausibly disrupt normal fertilization and contribute to infertility.
Q10. Considering the whole chapter, which of the following correctly contrasts the timing of gamete production between males and females, based on the fact box and general descriptions given?
A. Males continuously produce large numbers of sperm (around 1,500 per second), while the chapter's oogenesis description implies a much more limited, cyclical release of eggs (via ovulation)(correct answer)
B. Neither sex has any described rate or pattern of gamete production
C. Both sexes produce gametes at exactly the same continuous, high-volume rate
D. Females produce more gametes per second than males, based on the chapter
Answer: A.The chapter's fact box highlights the continuous, high-volume nature of male sperm production (about 1,500 per second), which contrasts with the cyclical, single-egg-per-ovulation pattern implied by the oogenesis and ovulation descriptions for females.