About this EAMCET Medical Zoology practice test

Zoology carries 40 of 160 marks in EAMCET Medical, covering the full Intermediate Zoology syllabus — Animal Kingdom classification, Human Physiology, Locomotion, Neural and Endocrine Control, Reproduction, Genetics and Evolution, Human Health and Disease, and Biotechnology. The exam rewards exact NCERT terminology over paraphrased answers, and it frequently tests near-identical concepts side by side to see if you can tell them apart under pressure. This practice set is built the same way, with explanations that call out exactly what distinguishes the correct answer from the tempting wrong one. Work through it, then bring in previous-year EAMCET Zoology questions for a final, exam-paced revision round.

EAMCET Medical Zoology Practice Test sample questions

These starter questions help you launch a zoology mock test quickly. Swap them with your own worksheet, notebook, or textbook questions any time.

1. 1. Which phylum is characterized by the presence of stinging cells called cnidoblasts, used for defence and capturing prey?

2. 2. Which phylum shows a true coelom lined by mesoderm and a closed circulatory system, as seen in the earthworm?

3. 3. The platypus, an egg-laying vertebrate, belongs to which subclass of Mammalia?

4. 4. In cockroaches, haemolymph enters the dorsal tubular heart through paired lateral openings called what?

5. 5. Which type of epithelial tissue lines the alveoli of the lungs to allow rapid gaseous exchange?

6. 6. Which enzyme present in gastric juice begins the digestion of proteins in the human stomach?

7. 7. What is the name given to the volume of air that moves into or out of the lungs during one normal, quiet breath?

8. 8. Which node of the human heart, located in the wall of the right atrium, is known as the natural pacemaker?

9. 9. In the human nephron, which segment reabsorbs about 70-80% of the glomerular filtrate, including glucose and amino acids?

10. 10. Which thin filament protein of the sarcomere carries the myosin-binding sites that are exposed by calcium during muscle contraction?

11. 11. Which type of joint, found between the vertebrae, allows only slight movement because of an intervening fibrocartilaginous disc?

12. 12. Which part of a neuron receives stimuli from adjacent cells and conducts impulses toward the cell body?

13. 13. What is the narrow junction called between the axon terminal of one neuron and the dendrite of the next neuron?

14. 14. Which part of the human brain controls involuntary vital functions such as heart rate, breathing rate and blood pressure?

15. 15. Which endocrine gland is called the "master gland" because its tropic hormones regulate the activity of most other endocrine glands?

16. 16. Deficiency of which thyroid hormone, caused by low dietary iodine, leads to simple goiter?

17. 17. Which accessory gland of the human male reproductive system secretes a fructose-rich fluid that nourishes sperm?

18. 18. Which structure in the human ovary, formed from the ruptured Graafian follicle, secretes progesterone after ovulation?

19. 19. What is the process called by which a haploid spermatid is transformed into a mature, motile spermatozoon?

20. 20. Which copper-releasing intrauterine device acts mainly by increasing phagocytosis of sperm and suppressing sperm motility in the uterus?

21. 21. Which assisted reproductive technique involves transferring a zygote formed in vitro into the fallopian tube of the woman?

22. 22. According to Mendel's law of segregation, the two alleles of a gene pair separate from each other during which biological process?

23. 23. In the ABO blood group system, the simultaneous, independent expression of the IA and IB alleles in genotype IAIB illustrates which type of gene interaction?

24. 24. The similar bony framework of a bat's wing, a whale's flipper and a human arm, despite performing different functions, is evidence of what?

25. 25. The diversification of a single ancestral finch species into many beak forms on the Galapagos Islands is a classic example of which evolutionary process?

26. 26. Malaria in humans is caused by a protozoan of which genus, transmitted by the bite of a female Anopheles mosquito?

27. 27. A newborn infant receiving ready-made antibodies through the mother's colostrum is an example of which type of immunity?

28. 28. Uncontrolled, excessive proliferation of white blood cells due to malignancy of blood-forming tissue is termed which disease?

29. 29. Which restriction endonuclease, isolated from E. coli and recognizing the sequence GAATTC, is widely used to cut DNA in genetic engineering?

30. 30. Organisms such as green plants that convert inorganic substances into organic food using sunlight occupy which trophic position in an ecosystem?

Answer key & quick explanations

Short answers for the sample questions above. Use this to self-check before generating a fresh AI-built mock test.

1. 1. Which phylum is characterized by the presence of stinging cells called cnidoblasts, used for defence and capturing prey?

   Cnidaria (Coelenterata)

   Cnidarians such as Hydra, jellyfish and sea anemones carry specialized cells called cnidoblasts (cnidocytes) on their tentacles. Each cell discharges a coiled thread on contact, which helps in anchorage, defence and capturing prey.

2. 2. Which phylum shows a true coelom lined by mesoderm and a closed circulatory system, as seen in the earthworm?

   Annelida

   Annelids such as the earthworm possess a true coelom (schizocoelom) lined on both sides by mesoderm, unlike pseudocoelomate or acoelomate groups. Their circulatory system is closed, meaning blood remains confined within vessels rather than bathing tissues directly.

3. 3. The platypus, an egg-laying vertebrate, belongs to which subclass of Mammalia?

   Prototheria (monotremes)

   The platypus retains ancestral reptilian traits such as laying eggs, yet it still has mammary glands and hair, placing it in the mammalian subclass Prototheria. This egg-laying group is evolutionarily distinct from pouched and placental mammals.

4. 4. In cockroaches, haemolymph enters the dorsal tubular heart through paired lateral openings called what?

   Ostia

   The cockroach heart is a segmented dorsal tube bearing valved lateral openings called ostia that admit haemolymph from the pericardial sinus. Heart contractions then push the haemolymph forward through the open circulatory system toward the head.

5. 5. Which type of epithelial tissue lines the alveoli of the lungs to allow rapid gaseous exchange?

   Simple squamous epithelium

   Simple squamous epithelium is a single layer of thin, flattened cells that minimizes the diffusion distance for gases. This thinness is exactly why it lines both the alveolar walls and the surrounding capillaries.

6. 6. Which enzyme present in gastric juice begins the digestion of proteins in the human stomach?

   Pepsin

   Chief cells secrete inactive pepsinogen, which hydrochloric acid from oxyntic cells converts into active pepsin. Pepsin then breaks proteins down into smaller peptones and proteoses within the acidic stomach environment.

7. 7. What is the name given to the volume of air that moves into or out of the lungs during one normal, quiet breath?

   Tidal volume

   Tidal volume is roughly 500 mL in a healthy resting adult and represents ordinary, unforced breathing. It is the smallest of the standard lung volumes measured through spirometry.

8. 8. Which node of the human heart, located in the wall of the right atrium, is known as the natural pacemaker?

   Sino-atrial (SA) node

   The SA node fires action potentials at a faster intrinsic rate than any other cardiac tissue, so it sets the pace for the whole heart. Its impulse spreads across both atria and then reaches the atrio-ventricular node before passing into the ventricles.

9. 9. In the human nephron, which segment reabsorbs about 70-80% of the glomerular filtrate, including glucose and amino acids?

   Proximal convoluted tubule (PCT)

   The PCT reclaims the bulk of useful filtrate contents, including glucose, amino acids and a large share of water and ions, passing them back into the peritubular capillaries. Losing this reabsorption capacity would waste enormous amounts of nutrients in the urine.

10. 10. Which thin filament protein of the sarcomere carries the myosin-binding sites that are exposed by calcium during muscle contraction?

    Actin

    Actin's myosin-binding sites are normally masked by tropomyosin at rest. When calcium binds troponin, tropomyosin shifts aside, exposing these sites so myosin cross-bridges can attach and drag the actin filament inward, shortening the sarcomere.

11. 11. Which type of joint, found between the vertebrae, allows only slight movement because of an intervening fibrocartilaginous disc?

    Cartilaginous joint

    Adjacent vertebral bodies are separated by intervertebral discs made of fibrocartilage, which cushion the column and permit limited bending. This arrangement trades large-scale mobility for stability along the spine.

12. 12. Which part of a neuron receives stimuli from adjacent cells and conducts impulses toward the cell body?

    Dendrite

    Dendrites are short, branched cytoplasmic extensions specialised for receiving incoming signals from neighbouring neurons or sensory cells. They convert these signals into impulses that then travel inward toward the soma.

13. 13. What is the narrow junction called between the axon terminal of one neuron and the dendrite of the next neuron?

    Synapse

    At a chemical synapse, neurotransmitter released from vesicles in the axon terminal crosses this narrow gap to bind receptors on the next neuron's membrane. This arrangement keeps impulse conduction moving in a single direction.

14. 14. Which part of the human brain controls involuntary vital functions such as heart rate, breathing rate and blood pressure?

    Medulla oblongata

    Located in the hindbrain, the medulla oblongata houses the cardiac, respiratory and vasomotor centres that regulate these automatic processes. Because these functions are essential to survival, injury to this region is often fatal.

15. 15. Which endocrine gland is called the "master gland" because its tropic hormones regulate the activity of most other endocrine glands?

    Pituitary gland

    The pituitary releases tropic hormones such as TSH, ACTH, FSH and LH that direct the thyroid, adrenal cortex and gonads respectively. Its broad influence over so many other glands earns it the title of master endocrine gland.

16. 16. Deficiency of which thyroid hormone, caused by low dietary iodine, leads to simple goiter?

    Thyroxine (T4)

    Thyroxine synthesis depends on adequate iodine intake, and when iodine runs short, thyroxine output falls while TSH rises to compensate. Sustained TSH stimulation enlarges the thyroid gland, producing the visible swelling seen in simple goiter.

17. 17. Which accessory gland of the human male reproductive system secretes a fructose-rich fluid that nourishes sperm?

    Seminal vesicle

    The paired seminal vesicles contribute a fructose-rich, alkaline secretion that forms a major share of seminal plasma. This fructose supplies energy to the highly motile sperm once they are ejaculated.

18. 18. Which structure in the human ovary, formed from the ruptured Graafian follicle, secretes progesterone after ovulation?

    Corpus luteum

    Once the Graafian follicle ruptures at ovulation, its remaining cells reorganize into the corpus luteum. This temporary endocrine structure secretes progesterone, which sustains the endometrium in case fertilization occurs.

19. 19. What is the process called by which a haploid spermatid is transformed into a mature, motile spermatozoon?

    Spermiogenesis

    Spermiogenesis involves shedding most of the cytoplasm, forming the acrosomal cap from the Golgi apparatus, and growing a flagellum for motility. Sertoli cells support this transformation within the seminiferous tubules until spermiation releases the finished sperm.

20. 20. Which copper-releasing intrauterine device acts mainly by increasing phagocytosis of sperm and suppressing sperm motility in the uterus?

    Copper-T (CuT)

    Copper ions released by the CuT raise the number of phagocytic leukocytes present in the uterine cavity, which engulf sperm, while also directly reducing sperm motility and fertilising capacity. It remains one of the most widely used reversible contraceptive devices in India's family planning program.

21. 21. Which assisted reproductive technique involves transferring a zygote formed in vitro into the fallopian tube of the woman?

    ZIFT (Zygote Intra-Fallopian Transfer)

    In ZIFT, fertilization is achieved outside the body and the resulting zygote is surgically placed into the fallopian tube rather than the uterus. From there the early embryo travels and implants much as it would after natural conception.

22. 22. According to Mendel's law of segregation, the two alleles of a gene pair separate from each other during which biological process?

    Gamete formation during meiosis

    During meiosis, homologous chromosomes carrying the two alleles of a gene move into different gametes, so no single gamete carries both. This is why a heterozygous parent produces two distinct types of gametes in equal numbers.

23. 23. In the ABO blood group system, the simultaneous, independent expression of the IA and IB alleles in genotype IAIB illustrates which type of gene interaction?

    Co-dominance

    When both IA and IB alleles are present together, each is expressed fully and independently, giving red blood cells that carry both A and B antigens. Neither allele suppresses the other, which is precisely what defines co-dominance.

24. 24. The similar bony framework of a bat's wing, a whale's flipper and a human arm, despite performing different functions, is evidence of what?

    Homologous organs

    All three limbs share the same basic pentadactyl arrangement inherited from a common ancestor, even though each has been reshaped for flying, swimming or grasping. This shared underlying structure despite differing function is the hallmark of homology.

25. 25. The diversification of a single ancestral finch species into many beak forms on the Galapagos Islands is a classic example of which evolutionary process?

    Adaptive radiation

    As the ancestral finch colonized different niches across the islands, its descendants evolved beak shapes suited to the specific food sources available in each niche. This divergence of one lineage into many forms within an isolated region is textbook adaptive radiation.

26. 26. Malaria in humans is caused by a protozoan of which genus, transmitted by the bite of a female Anopheles mosquito?

    Plasmodium

    The female Anopheles mosquito acts as the vector, injecting Plasmodium sporozoites into the bloodstream while feeding. The parasite then multiplies first in liver cells and later in red blood cells, producing the periodic fever typical of malaria.

27. 27. A newborn infant receiving ready-made antibodies through the mother's colostrum is an example of which type of immunity?

    Passive immunity

    Colostrum, the first breast milk, is rich in antibodies like IgA that pass directly to the infant without its own immune system generating them. Because the protection is borrowed rather than self-produced, it fades once the maternal antibodies are broken down.

28. 28. Uncontrolled, excessive proliferation of white blood cells due to malignancy of blood-forming tissue is termed which disease?

    Leukemia

    Leukemia arises when blood-forming tissue produces WBCs in an unchecked, malignant fashion, crowding out normal blood cell production. This overproduction impairs the body's ability to mount effective immune responses despite the high WBC count.

29. 29. Which restriction endonuclease, isolated from E. coli and recognizing the sequence GAATTC, is widely used to cut DNA in genetic engineering?

    EcoRI

    EcoRI recognizes the palindromic sequence GAATTC and cleaves the DNA backbone at a defined point within it, leaving sticky ends. Those sticky ends let the cut fragment be joined into a vector cut with the same enzyme during recombinant DNA work.

30. 30. Organisms such as green plants that convert inorganic substances into organic food using sunlight occupy which trophic position in an ecosystem?

    Producers (autotrophs)

    Producers capture solar energy and fix carbon dioxide and water into organic compounds like glucose through photosynthesis. Every other trophic level, from primary consumers onward, ultimately relies on the energy these producers first fixed.

Curriculum Mapping & Learning Guide

Use this breakdown to identify which skills each question tests and guide post-test review.

EAMCET Medical Zoology units covered

1. Chapter 1: Diversity in the Living World (Animal Kingdom)
2. Chapter 2: Structural Organisation in Animals
3. Chapter 3: Animal Physiology (Digestion, Breathing, Circulation, Excretion)
4. Chapter 4: Locomotion and Movement
5. Chapter 5: Neural Control and Coordination
6. Chapter 6: Chemical Coordination and Integration
7. Chapter 7: Reproduction in Humans
8. Chapter 8: Reproductive Health
9. Chapter 9: Genetics and Evolution
10. Chapter 10: Human Health and Disease
11. Chapter 11: Biotechnology and Its Applications
12. Chapter 12: Ecology and Environment