25 questions in 25 minutes on the NTA computer-based test interface, all from Human Reproduction. +4 / -1 marking, instant score, full solutions. Free, no login.
A chapter test is the fastest honest check on whether a chapter has actually landed. This one draws 25 questions from Human Reproduction, of which 18 are real NEET previous-year questions and 6 sit at the harder end of the bank. Sit it in one 25-minute block, the way you would in the hall.
Revising first? Read the Human Reproduction chapter notes, then come back and take this test to check it stuck.
Loading your test…
Fetching the question paper. This takes a moment on a slow connection.
This test is part of the paid library
Unlock all 72 timed NEET CBT papers once, keep them forever. The 30 chapter tests stay free.
One payment. No subscription. Works on any device you log the key into.
Already bought it?
Paste the licence key from your payment email.
Duration: 180 minutes · 180 questions · 720 marks maximum
- The clock will be set at the server. The countdown timer at the top right of the screen will display the remaining time. When the timer reaches zero, the examination will end by itself.
- The Question Palette displayed on the right side of the screen will show the status of each question using one of the following symbols:
- Each correct answer carries +4 marks; each incorrect answer carries −1 mark. Un-attempted questions carry no marks.
- Navigate between sections using the section tabs, and between questions using SAVE & NEXT or the Question Palette.
- Your answers are saved in this browser, so an accidental refresh will not wipe a test in progress.
Submit the test?
Once you submit you cannot change answers. You will see your score and full solutions.
Your Result
Practice another mock test → · Continue practising on the ChapterNotes app →
Solutions & Revision
More Zoology chapter tests
All NEET Zoology CBT tests · The full NEET 2027 CBT mock library
NEET CBT mock test: common questions
How many questions are in this Human Reproduction mock test?
25 questions in 25 minutes, marked +4 for a correct answer and -1 for a wrong one, exactly like the real paper. 18 of them are NEET previous-year questions.
Is this the same interface as the real NEET CBT?
Yes. On-screen countdown, colour-coded question palette, Save & Next, Clear Response and Mark for Review, then an instant score with full solutions.
Should I take this before or after revising Human Reproduction?
Both, and that is the point. Take it cold to find out what you actually do not know, revise from the chapter notes, then retake it to confirm the gap closed.
All 25 questions with answers and solutions
The complete paper in text form, with the correct option and a worked explanation for every question. Sit the timed test above first: the score is only worth having if you earn it. Then open this to revise, or to re-read a question you got wrong without replaying the whole paper.
Show all 25 questions with answers and solutions
Zoology
- Q1Which one of the following statements about morula in humans is correct?
- It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
- It has far less cytoplasm as well as less DNA than an uncleaved zygote
- It has more or less equal quantity of cytoplasm and DNA
- It has more cytoplasm and more DNA than an uncleaved zygote
Answer: (A) It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
Cleavage divides the zygote without growth, so the morula has about the same total cytoplasm as the uncleaved zygote, but because each cell replicated its DNA before dividing, the morula’s total DNA content is much higher than the single zygote’s.
- Q2Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
- Allantois
- Chorion
- Yolk sac
- Amnion
Answer: (D) Amnion
The amnion encloses the amniotic fluid that bathes the embryo, cushioning it and preventing desiccation. The chorion forms part of the placenta, the allantois handles excretion/respiration in amniotes, and the yolk sac stores/transfers nutrients.
- Q3Acrosome reaction in sperm is triggered by:
- Influx of Na⁺
- Release of lysin
- Capacitation
- Release of fertilisin
Answer: (D) Release of fertilisin
Fertilisin, a glycoprotein released by the egg, binds the antifertilisin on the sperm surface; this fertilisin-antifertilisin reaction triggers the acrosome reaction (releasing sperm lysins). Capacitation precedes but does not itself trigger the acrosome reaction.
- Q4Ovulation in the human female normally takes place during the menstrual cycle:
- At the mid secretory phase
- At the end of the proliferative phase
- Just before the end of the secretory phase
- At the beginning of the proliferative phase
Answer: (B) At the end of the proliferative phase
Ovulation occurs at about day 14, at the end of the proliferative (follicular) phase, when the LH surge ruptures the mature follicle. The secretory (luteal) phase follows ovulation, so options describing it are wrong.
- Q5The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
- Third month
- Sixth month
- Fourth month
- Fifth month
Answer: (D) Fifth month
By about the fifth month the first foetal movements are felt and hair appears on the head. Most organs form by the end of the third month, but movement and head hair are fifth-month milestones.
- Q6The shared terminal duct of the reproductive and urinary system in the human male is the:
- Vas deferens
- Vasa efferentia
- Urethra
- Ureter
Answer: (C) Urethra
In the human male the urethra is a urogenital duct: it carries both urine from the bladder and semen during ejaculation. The ureter only carries urine (kidney to bladder); the vas deferens and vasa efferentia carry only sperm.
- Q7Assertion (A): The placenta functions as a temporary endocrine gland during pregnancy. Reason (R): It secretes hormones such as hCG, hPL, estrogen, progesterone and relaxin.
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is NOT the correct explanation of A
- A is false but R is true
- A is true but R is false
Answer: (A) Both A and R are true and R is the correct explanation of A
The placenta is an endocrine organ precisely because it secretes hormones (hCG, hPL, estrogen, progesterone, relaxin) that maintain pregnancy; R correctly explains A.
- Q8Hormones secreted by the placenta to maintain pregnancy are:
- hCG, hPL, oestrogens, relaxin, oxytocin
- hCG, progestogens, oestrogens, glucocorticoids
- hCG, hPL, progestogens, oestrogens
- hCG, hPL, progestogens, prolactin
Answer: (C) hCG, hPL, progestogens, oestrogens
The placenta secretes hCG, human placental lactogen (hPL), progestogens and oestrogens to maintain pregnancy. Oxytocin, prolactin and glucocorticoids come from other glands (pituitary, adrenal), so the only fully correct set is A.
- Q9Several hormones like hCG, hPL, oestrogen and progesterone are produced by the:
- Placenta
- Ovary
- Pituitary
- Fallopian tube
Answer: (A) Placenta
The placenta is a temporary endocrine organ that produces hCG, hPL, oestrogen and progesterone during pregnancy. The ovary makes oestrogen/progesterone but not hCG or hPL; the pituitary and Fallopian tube do not make this set.
- Q10Human eggs (ova) are:
- Alecithal
- Microlecithal
- Macrolecithal
- Mesolecithal
Answer: (A) Alecithal
Human ova are almost free of yolk and are termed alecithal; cleavage in such eggs is holoblastic (complete), extending through the whole egg. Microlecithal, mesolecithal and macrolecithal denote progressively more yolk.
- Q11Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?
- Relaxin
- Prolactin
- Oestrogen
- Oxytocin
Answer: (D) Oxytocin
Oxytocin, from the posterior pituitary, drives the foetal ejection reflex (uterine contractions during birth) and the milk ejection (let-down) reflex. Prolactin makes milk but does not eject it; oestrogen and relaxin have other roles.
- Q12The corpus luteum, formed after ovulation, primarily secretes:
- FSH to mature new follicles
- LH to cause ovulation
- hCG to detect pregnancy
- Progesterone to maintain the endometrium
Answer: (D) Progesterone to maintain the endometrium
The ruptured follicle becomes the corpus luteum, which secretes large amounts of progesterone (and some estrogen) to maintain the endometrium for possible implantation.
- Q13Ectopic pregnancies are referred to as:
- Implantation of a defective embryo in the uterus
- Pregnancies terminated due to hormonal imbalance
- Implantation of the embryo at a site other than the uterus
- Pregnancies with genetic abnormality
Answer: (C) Implantation of the embryo at a site other than the uterus
Ectopic pregnancy is implantation of the embryo somewhere other than the uterine endometrium, most often the Fallopian tube (tubal pregnancy). It is not defined by genetic defects or hormonal termination.
- Q14The hollow, fluid-filled stage of the embryo that implants into the endometrium is the:
- Blastocyst
- Gastrula
- Zygote
- Morula
Answer: (A) Blastocyst
The morula develops a cavity to become the blastocyst, consisting of an outer trophoblast and an inner cell mass; it is the blastocyst that implants in the endometrium.
- Q15In which part of the female reproductive tract does fertilisation normally occur?
- Uterus
- Ampulla of the fallopian tube
- Infundibulum
- Cervix
Answer: (B) Ampulla of the fallopian tube
Fertilisation occurs in the ampullary region of the oviduct (the ampulla-isthmus junction). The uterus is the site of implantation, not fertilisation.
- Q16Sertoli cells are found in the:
- Adrenal cortex and secrete adrenaline
- Seminiferous tubules and provide nutrition to germ cells
- Pancreas and secrete cholecystokinin
- Ovaries and secrete progesterone
Answer: (B) Seminiferous tubules and provide nutrition to germ cells
Sertoli (nurse) cells line the seminiferous tubules and nourish/support the developing spermatozoa; they also secrete inhibin. They are not in the ovary, adrenal cortex or pancreas, and adrenaline is from the adrenal medulla.
- Q17Meiotic division of the secondary oocyte is completed:
- At the time of fusion of a sperm with an ovum
- After zygote formation
- Prior to ovulation
- At the time of copulation
Answer: (A) At the time of fusion of a sperm with an ovum
The secondary oocyte is arrested at metaphase II and completes meiosis II only when a sperm enters at fertilisation, forming the ovum and the second polar body. It is not completed before ovulation or after the zygote already exists.
- Q18Which of the following hormone levels will cause release of the ovum (ovulation) from the Graafian follicle?
- Low concentration of FSH
- High concentration of progesterone
- High concentration of oestrogen
- Low concentration of LH
Answer: (C) High concentration of oestrogen
A high concentration of oestrogen near mid-cycle exerts positive feedback on the anterior pituitary, triggering the LH surge that ruptures the Graafian follicle and causes ovulation. High progesterone and low LH/FSH do not cause ovulation.
- Q19If for some reason the vasa efferentia in the human reproductive system get blocked, the gametes will NOT be transported from:
- Vagina to uterus
- Epididymis to vas deferens
- Ovary to uterus
- Testes to epididymis
Answer: (D) Testes to epididymis
The vasa efferentia are 10-20 fine ductules connecting the rete testis to the epididymis. If blocked, sperm cannot pass from the testes to the epididymis. The other options describe female-tract routes or a later segment of the male tract.
- Q20If fertilisation does NOT occur, menstruation results mainly because:
- FSH levels rise sharply
- The corpus luteum degenerates and progesterone falls
- The LH surge is repeated
- Estrogen rises to a peak
Answer: (B) The corpus luteum degenerates and progesterone falls
Without pregnancy, the corpus luteum regresses; the resulting fall in progesterone (and estrogen) causes the endometrium to break down, producing menstrual flow.
- Q21The outer layer of the blastocyst that attaches to the uterine wall and later helps form the placenta is the:
- Trophoblast
- Corona radiata
- Zona pellucida
- Inner cell mass
Answer: (A) Trophoblast
The trophoblast is the outer cell layer of the blastocyst; it attaches to the endometrium during implantation and gives rise to chorionic villi that form the placenta. The inner cell mass forms the embryo proper.
- Q22The structure that connects the developing fetus to the placenta for exchange of nutrients and wastes is the:
- Cervix
- Umbilical cord
- Corpus luteum
- Amnion
Answer: (B) Umbilical cord
The umbilical cord links the fetus to the placenta, carrying blood vessels for the exchange of nutrients, gases and wastes between mother and fetus.
- Q23Identify the correct statement on ‘inhibin’:
- It is produced by nurse cells in the testes and inhibits the secretion of LH
- It inhibits the secretion of LH, FSH and prolactin
- It is produced by granulosa cells in the ovary and inhibits the secretion of FSH
- It is produced by granulosa cells in the ovary and inhibits the secretion of LH
Answer: (C) It is produced by granulosa cells in the ovary and inhibits the secretion of FSH
Inhibin is produced by granulosa cells of the ovarian follicle (and by Sertoli cells in males) and has a negative feedback effect specifically on FSH secretion. It does not selectively inhibit LH or prolactin.
- Q24Seminal plasma in human males is rich in:
- DNA and testosterone
- Ribose and potassium
- Glucose and calcium
- Fructose and calcium
Answer: (D) Fructose and calcium
Seminal plasma (the fluid part of semen, mainly from the seminal vesicles and prostate) is rich in fructose (energy source for sperm) and certain ions including calcium. It is not rich in glucose, DNA, or ribose.
- Q25The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for:
- Providing more space for the growth of epididymis
- Providing a secondary sexual feature for exhibiting the male sex
- Maintaining the scrotal temperature lower than the internal body temperature
- Escaping any possible compression by the visceral organs
Answer: (C) Maintaining the scrotal temperature lower than the internal body temperature
Spermatogenesis requires a temperature about 2-2.5 °C below core body temperature, so the scrotum holds the testes outside the body to keep them cooler. The scrotum is not primarily for protection from compression, epididymal space, or as a mere secondary sexual feature.