10th Biology - Public Exam Expected Questions

   

 X – BIOLOGY EXPECTED QUESTIONS
2025 – 2026

2 Marks :
1. Draw and label the structure of oxysomes.
2. Write the dental formula of rabbit.
3. What does CNS stand for?
4. Why are the rings of cartilages found in trachea of rabbit?
5. What are heart sounds? How are they produced?
6. Who discovered Rh factor? Why was it named so?
7. Define stimulus.
8. Name the parts of the hind brain.
9. Define reflex arc.
10. What are the structure involved in the protection of brain?
11. What are synthetic auxins? Give examples.
12. What is bolting? How can it be induced artificially?
13. What are chemical messengers?
14. Define triple fusion.
15. Name the secondary sex organs in male.
16. What are allosomes?
17. What are okazaki fragments?
18. What do you understand by the term phenotype and genotype?
19. Why is Archaeopteryx considered to be a connecting link?
20. Name the types of stem cells.
21. Define genetic engineering.
22. Name two maize hybrids rich in amino acid lysine.
23. What are psychotropic drugs?
24. What will happen if trees are cut down?
25. What are the agents of soil erosion?
26. Solar energy is a renewable energy. How?
27. What is Scratch?
28. What is stage?
29. What is sprite?
30. Expand – ATP, ADP, NAD, NADP.

4 Marks :
1. Differentiate the following:
a) Monocot root and Dicot root.
b) Aerobic and Anaerobic respiration.
2. a) What is respiratory quotient?
b) Write the reaction for photosynthesis?
3. a) List out the parasitic adaptations in leech.
b) How is diastema formed in rabbit?
4. a) How does locomotion takes place in leech?
b) What is cohesion?
5. How are arteries and veins structurally different from one another?
6. How do plants absorb water? Explain & Enumerate the functions of Blood.
7. a) Differentiate between Voluntary and Involuntary actions.
b) Medullated and Non – Medullated nerve fibre.
8. Classify neurons based on its structure.
9. a) Bring out any two physiological activities of abscisic acid.
b) Sanjay is sitting in the exam hall before the start of the exam, he sweats a lot, with increased rate of heart beat. Why does this condition occur?
10. What is the role of parathormone?
11. a) Write the characteristics of insect pollinated flowers.
b) What is colostrums? How is milk production hormonally regulated?
12. Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.
13. Why did Mendel select Pea plant for his experiments?
14. Differentiate between Homologous organs from analogous organs.
15. State the applications of DNA finger printing technique.
16. Differentiate between outbreeding and inbreeding.
17. Distinguish between somatic gene therapy and germ line gene therapy.
18. Differentiate cancer cell and normal cell.
19. What are the precautions taken to prevent heart disease.
20. Differentiate Type – 1 and Type – 2 diabetes mellitus.
21. Enumerate the importance of forest.
22. What is the importance of rain water.
23. How will you prevent soil erosion?
24. What are the various routes by which transmission of human immune deficiency virus takes place?
25. a) What are the contributing factors for obesity?
b) What is metastasis?

7 Marks :
1. Suggest measures to overcome the problems of an alcoholic.
2. List any three activities based on 4R approach to conserve matural resources.
3. Discuss the importance of biotechnology in the field of medicine.
4. Define Ethnobotany and write its importance.
5. How is the structure of DNA organised? What is the biological significance of DNA?
6. What are the phases of menstrual cycle? Indicate the changes in the ovary and iterus.
7. With a neat labelled diagram describe the parts of a typical angiospermic ovule.
8. Why are thyroid hormones refered as personality hormone?
9. Write the physiological effects of gibberellins.
10. Illustrate the structure and functions of brain.
11. Why are leucocytes classified as granulocytes and agranulocytes? Name each cell and mention its function?
12. Describe the name three stages of cellular respiration that aerobic organism use to obtain energy from glucose.

Prepared By
D.Santhoshkumar, M.Sc, M.Phil, M.Ed.,
PGT ZOOLOGY
Shri Bala Vidhya Mandir Matric.Hr.Sec School, Vilai – Arni.