Biology

Human Reproductive System

751 Questions

The human reproductive system covers the anatomy of reproductive organs, gamete production, fertilization processes, and reproductive technologies. This is a highly scoring area in biology sections of competitive exams. Use these questions to practice key concepts.

Fertilization processGamete productionReproductive organ functionsAssisted reproductive technology

Human Reproductive System Questions

Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

As compared to the sperm the egg contains more 

  1. Chromosomes

  2. Centrioles

  3. Cytoplasm

  4. Mitochondria
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In most of the higher plants and animals including humans, the male gamete is small and motile, whereas, female gamete is large and immotile. The female gamete contributes both the genetic material as well as cytoplasm during zygote formation as compared to this the male gamete does not contribute cytoplasm but provides only half the genetic complement. Hence, major cell organelles like mitochondria and chloroplasts show cytoplasmic or maternal inheritance pattern. Thus, the correct answer is option C.

Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

Fertilizins are emitted by

  1. Immature eggs

  2. Mature eggs

  3. Sperms

  4. Polar bodies
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mature egg secretes a chemical known as fertilizin, which is composed of glycoprotein (monosaccahride and fatty acid substance). Sperm has on its surface a protein substance known as antifertilizin, which is composed of acidic amino acids. The fertilizin and antifertilizin interacts together and this interaction makes the sperms stick to the egg surface. Hence, option B is correct answer.

Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

Oophorocystosis is

  1. Disorder of female reproductive system

  2. Stage in the production of ovum

  3. Disorder in male reproductive system

  4. Stage in the production of sperms
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oophorocystosis is the disorder of ovaries in which formation of cysts. These are small egg follicles that don't grow to ovulation and are the result of altered hormone levels.

So the correct option is 'Disorder of female reproductive system'.

Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

Which event becomes possible due to formation of egg membrane?

  1. Sperm can enter into ovum

  2. Prevents entry of other sperms in to ovum

  3. Prevents the process of fertilization so pregnancy is prevented

  4. Makes fertilization process possible and causes pregnancy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The sperm that successfully reaches the secondary oocyte is initially prevented entry by both corona radiata and the zona pellucida. When the sperm reaches the corona radiata, their motility allows the sperm to push through the cell layers. After the sperm has made a pathway through the corona radiata, they release digestive enzymes from their acrosomes to penetrate the zona pellucida. When one sperm successfully penetrates the zona pellucida and its nucleus enters the secondary oocyte, immediate changes occur in both the zona pellucida and the oocyte, so that no other sperm can enter. In essence, the zona pellucida hardens, preventing entry of other sperms into the ovum. 

So, the correct answer is option B.
Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

If mammalian ovum fails to get fertilised, which one of the following is unlikely?

  1. Corpus luteum will disintegrate.

  2. Progesterone secretion rapidly declines.

  3. Estrogen secretion increases.

  4. Primary follicle starts developing.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

If the ovum fails to get fertilised, then corpus luteum (source of progesterone and estrogen) will disintegrate resulting in a decrease in the level of progesterone and estrogen. Thus, the endometrial lining of the uterus sloughs off and menstruation begins, marking a new cycle.

Multiple choice female reproductive structure reproductive system of human hormones, homeostasis, and reproduction human physiology biology

Polar bodies

  1. Nurse the egg as it leaves the follicle

  2. Is extra chromosomal material representing the X chromosome in each female cell

  3. Orient the sperm toward the egg

  4. Allow a reduction in chromosomes while preserving all the food for one egg
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cell that results from the asymmetric division of an oocyte is a polar body. In animals and humans, polar bodies are produced after every meiotic division. They are relatively smaller in size due to less cytoplasm compared to the gametocyte that will become the ovum. This is essential so that much of the cytoplasm is available and the chromosomal content is halved at the time of fertilization. The polar bodies will eventually degenerate.

So the correct option is 'allow a reduction in chromosomes while preserving all the food for one egg'.

Multiple choice biology animal lore types of reproduction in animals oviparous and viviparous butterfly and honey bee

Which of the following statements is not correct regarding oviparous animals?

  1. Females lay fertilised/unfertilised eggs at a safe place

  2. Development of zygote takes place outside the female's body

  3. Examples of oviparous animals are all birds, most reptiles and egg-laying mammals

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Oviparous animals are animals that lay eggs. Fertilization can be external or internal, but hatching always takes place in the external environment, never in the mother's womb. Fish, amphibians, reptiles, birds and even occasionally some mammals, are oviparous. These animals usually lay their eggs in well-protected nests, where the embryo develops inside the egg before hatching. 
So, the correct option is 'none of these'. 

Multiple choice biology the flower structure of a bisexual flower growth and development in plants basics of leaf and flower

Male gametes are present in

  1. Anther

  2. Style

  3. Stigma

  4. Filament
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The whorl of the flower are differentiated into two categories essential and non-essential whorl and are consists of 

  1. Stamens or androecium are the male reproductive part and are divided into filament (long slender stalk) and anther (the terminal bilobed structure that produces male gametes).
  2. Carpels or gynoecium are the female reproductive part and produce ovum and is divided into three parts stigma (where pollen grains land), style(that leads pollen tube to the ovary) and ovary that produce ovum(female gamete).
So, the correct answer is 'Anther'

Multiple choice botany caskets of life the cell structure multicellular organisms number and shape of cells

How many statements is/are correct?
(A) Premordial germ cells are $2$n in nature.
(B) Spermipgenesis occurs in epididymis.
(C) Galea capitis is cap like structure found at head of sperm.
(D) Corpus spongiosum is covered by tunica albuginea.

  1. One

  2. Two

  3. Three

  4. Four
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Only statement (C) is correct. (A) Primordial germ cells are diploid (2n). (B) Spermiogenesis occurs in the seminiferous tubules, not the epididymis. (D) The corpus spongiosum is not covered by tunica albuginea (the corpora cavernosa are).

Multiple choice botany caskets of life the cell structure multicellular organisms number and shape of cells

Human egg has a volume larger than human sperm by

  1. $100,000$
  2. $10,000$
  3. $1000$
  4. $100$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In short a gamete is an egg cell (female gamete) or a sperm (male gamete). This is an example of anisogamy or heterogamy, the condition in which females and males produce gametes of different sizes. This is the case in humans, the human ovum has approximately 100,000 times the volume of a single human sperm cell. 

Hence A is the correct option.

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

During fertilization male gametes are carried by pollen tube. This is called ________.

  1. Syngamy

  2. Mesogamy

  3. Polygamy

  4. Siphonogamy
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Siphonogamy is a condition in plants in which dust tubes are produced for the exchange of the male cells to the eggs. The seed plants are phenogamous, while in the lower plants the male cells ordinarily swim to the eggs. 
So, the correct option is 'Siphonogamy'.

Multiple choice botany modes of reproduction introduction to flower pre fertilization - plants sexual reproduction in flowering plants the origin of cells and cell division

Fertilization which involves carrying male gametes by pollen tube is called

  1. Porogamy

  2. Siphonogamy

  3. Chalazogamy

  4. Syngonogamy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process fertilization accomplished by means of pollen tube in which the transfer of male gametes to the female gametes takes place.

So the correct option is 'Siphonogamy'.

Multiple choice zoology production of food from animals animal breeding animal husbandry and its importance introduction to animal husbandry

Infertility of local breeds of cattle can be overcome by use of ___________.

  1. Cross breeding with exotic breads

  2. Good nourishment

  3. Stibesterol

  4. Gonadotropin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gonadotropin releasing hormone is a decapeptide that plays a vital role in regulating the reproductive processes. Release of this hormone from hypothalamus occurs in a pulsatile fashion and it is regulated by various internal and external signals. GnRH has its primary effects at the pituitary gonadotrope and stimulates the the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH).

Multiple choice lifespan reproduction and variation zoology plant reproduction different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

| | List I | | List II | | A | Internal fertilization | 1 | Ovum | | B | External fertilization | 2 | Sperm | | C | Male gamete | 3 | Hen | | D | Female gamete | 4 | Hydra | | E | Budding | 5 | Frog | | F | Binary fission | 6 | Fertilised egg | | G | Zygote | 7 | Amoeba |

  1. A- 3, B- 5, C- 1, D- 2, E- 4, F- 7, G- 6

  2. A- 3, B- 5, C- 2, D- 1, E- 7, F- 4, G- 6

  3. A- 3, B- 5, C- 2, D- 1, E- 4, F- 7, G- 6

  4. A- 6, B- 5, C- 2, D- 1, E- 4, F- 7, G- 3
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The fertilization which takes place inside the female's body is called internal fertilization, hen shows internal fertilization.
The fertilization which takes outside the female's body is called external fertilization as in the case of frogs.
Sperm is the male reproductive cell or the male gamete.
Ovum is the female reproductive cell or the female gamete.
Budding is a form of asexual reproduction in which a new organism develops from an outgrowth or bud due to the cell division at that particular site as in case of hydra.
Binary fission is a form of asexual reproduction used by all prokaryotes (including amoeba) where the cell divides into two nearly equal-sized daughter cells.
A zygote is a diploid cell that is formed by the fusion of male and female gamete. So, the fertilized egg is the zygote.
Thus, the correct answer is option C.

Multiple choice biology for the continuity of generation fertilization in human being fertilization in humans human fertilization

Passage of ova through female reproductive tract is facilitated by 

  1. Ciliary movement

  2. Amoeboid movement

  3. Flagellar movement

  4. Cyclosis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The fallopian cells have cells lined with small hair-like structures called cilia that enable movement of the ovum to the uterus via ciliary movement. 

So, the correct answer is 'Ciliary movement'.