CBSE Class 10 Biology Important Question

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Important Very Short Answer Type Questions (1 Marks)

For class 10 students, board examinations are the first step preparing themselves for a successful career. CBSE Class 10 Science mainly focuses on the three sub-divisions—Chemistry, Physics and Biology. The huge syllabi more often make the students confounded. To reduce that stress, SpeedLabs have compiled all important questions subject-wise. Here we provide CBSE Class 10 Biology essential questions to prepare for the upcoming board examinations. So, hurry up and boost your learning with these personalised analysis and study tips. The section is divided into sections, and the marks range from 1 to 5 marks.


Important Short Answer Type Questions (1 Marks)

Important Short Answer Type Questions (2 Marks)

Important Short Answer Type Questions (3 Marks)

Important Long Answer Type Questions

Important Short Answer Type Questions (1 Marks) Stroke 396

  • 1. State one difference between autotrophic and hetrotrophic mode of nutrition.
  • 2. Define peristaltic movement.
  • 3. What is the role of saliva in the digestion of food ?
  • 4. Name the tissue that transports water and minerals in plants.
  • 5. What is the role of acid in our stomach ?
  • 6. What is emulsification ?
  • 7. Name the cell organelle in which photosynthesis occur.
  • 8. Name the largest artery in the human body.
  • 9. Which gland is known as master gland ?
  • 10. Name the hormone that regulates blood sugar level.
  • 11. What is synapse ?
  • 12. What are tropic movements ?
  • 13. Which part of the brain is responsible for maintaining posture and balance of our body ?
  • 14. Which hormone has inhibiting effects on growth of plants ?
  • 15. What is phototropism ?
  • 16. What are the components of central nervous system ?
  • 17. What type of reproduction takes place in plasmodium ?
  • 18. Define vegetative propagation.
  • 19. Where is DNA present in a cell ?
  • 20. Name the glands associated with male reproductive system.
  • 21. What is menstruation ?
  • 22. Name two contraceptive methods.
  • 23. Where are the reproductive parts located in a plant ?
  • 24. Write the scientific name of men and garden pea.
  • 25. Where are genes located ?
  • 26. No two individuals are absolutely alike in a population. Why ?
  • 27. What are the chromosomes XY and XX known as ?
  • 28. Name five varieties of vegetables which have been produced from ‘wild cabbage’ by the process of artificial selection.
  • 29. Why is ozone layer getting depleted at the higher levels of the atmosphere
  • 30. How is the increase in demand for energy affecting our environment adversely
  • 31. Name any two forest products, each of which is the basis for some industry.
  • 32. State two changes you can make in your habits to reduce the consumption of electricity or water.

Important Short Answer Type Questions (2 Marks)

  • 1. What is decomposition reaction ? Explain with the help of an example.
  • 2. How is small intestine designed to absorb digested food ?
  • 3. What are stomata ? Draw a labeled diagram of stomata.
  • 4. Write the equation for the process of breakdown of glucose in a cell :
    • (a) in the presence of oxygen.
    • (b) in the absence of oxygen.
  • 5. Write the differences between inhalation and exhalation.
  • 6. List the three events which occur during photosynthesis.
  • 7. How does transpiration help in upward transport of substances.
  • 8. Write the functions of the components of blood.
  • 9. Why is small intestine longer in herbivores than in carnivores ?
  • 10. Explain the cause of cramps after excessive physical exercise.What is the role of toothpastes in preventing cavities ?
  • 11. Draw a labelled diagram of neuron.
  • 12. What is reflex arc ? Explain with the help of flow chart.
  • 13. What is the cause of diabetes ? How it can be controlled ?
  • 14. Why is it advisable to use iodised salt ?
  • 15. What are sensory and motor neurons ? Write their functions.
  • 16. Why is Abscisic acid called as stress hormone ?
  • 17. What is the need for a system of control and coordination in an organization ?
  • 18. Write two important functions of testosterone.
  • 19. What is placenta ? Also write its functions.
  • 20. Why do we see different types of organisms around us ?
  • 21. What is the importance of variation ?
  • 22. Why is vegetative propagation practiced for growing some types of plants ?
  • 23. Write names of male and female sex hormones.
  • 24. Mention the parts of a flower.
  • 25. Differentiate between bisexual and unisexual flowers.
  • 26. Differentiate between homologous and analogous organs, with examples.
  • 27. What are fossils ? How can the age of fossils be determined ?
  • 28. How is ozone formed in the upper atmosphere? Why is the damage of ozone layer a cause of concern to us? State a cause of this damage
  • 29. Describe how decomposers facilitate recycling of matter in order to maintain balance in the ecosystem.
  • 30. State any four personal choices you would like to make to reduce energy consumption without affecting the quality of life or work explaining how each one of them would help you to do so
  • 31. Name any four categories of people who depend on the forest resources, mentioning major needs of each category
  • 32. Suggest any four changes that you would like to incorporate in the life style of students of your age to move towards a sustainable use of available resources.

Important Short Answer Type Questions (3 marks)

Question numbers 6 to 15 in Section- A are three marks questions. These are to be answered in about 50 words each.

  • 1. Describe the process of double circulation in human beings.
  • 2. What are the methods used by plants to get rid of their waste products ?
  • 3. Give reason for the following :
    • (a) Arteries are thick walled blood vessels.
    • (b) Veins are thin walled blood vessels.
    • (c) Veins have valves in them.
  • 4. What are plant hormones ? Name a plant hormone that promotes growth in plants.
  • 5. What is the significance of tropic movements in plants ? Explain any two types of tropic movements.
  • 6. Which hormone is known as emergency hormone in our body ? How it helps in coping during emergency ?
  • 7. Where are different receptors present in our body ? What are their functions ?
  • 8. What is tissue culture ?
  • 9. Explain the process of fertilisation in flowering plants.
  • 10. Name the different constituents of semen.
  • 11. Draw a well-labelled diagram of male reproductive system.
  • 12. What is pre-natal sex determination ? Why is it banned ?
  • 13. Draw a labelled diagram of the longitudinal section of a flower
  • 14. Variation is beneficial to the species but not necessarily for the individual. Give three reasons to justify it.
  • 15. Why are bacteria and fungi called decomposers? List any two advantages of decomposers to the environment.
  • 16. (a) What is ‘environmental pollution’?
    • (b) Distinguish between biodegradable and non-biodegradable pollutants.
    • (c) Choose the biodegradable pollutants from the list given below:
  • 17. Sewage, DDT, radioactive waste, agricultural waste.
  • 18. Suggest three ways to maintain a balance between environment and development to survive.
  • 19. What is meant by sustainable management? The environmentalists are insisting upon “sustainable natural Resources management”. State its four advantages.
  • 20. The human hand, cat paw and horse foot, when studied in detail show the same structure of bones and point towards a common origin.
    • (a) What do you conclude from this ?
    • (b) What is the term given to such structures ?

  • Important Long Answer Type Questions

    Question numbers 16 to 21 in Section-A are 5 marks questions. These are to be answered in 70 words each.

    • 1. If you chew chapatti for long, after some time it taste sweet ? Why is this so ?
    • 2. What is the benefit of residual volume of air in the respiratory process ?
    • 3. Why is the energy needs in plants is very less as compared to animals ? Explain.
    • 4. Draw a well-labelled diagram of Nephron. Explain the process of formation of urine in the human kidney.
    • 5. Draw a diagram showing Human Respiratory System. Label the following parts :
      • (a) Alveolus (b) Trachea
      • (c) Bronchus (d) Lungs
    • 6. Draw a labelled diagram of human brain and state the functions of its different parts.
    • 7. What are hormones ? Give the name of associated gland and functions of different animal hormones.
    • 8. What is feedback mechanism ? Explain its working with the help of one example.
    • 9.
      • (a) How brain and spinal cord are protected ?
      • (b) What are the different parts of human nervous system ?
      • (c) What are the limitations of nervous system ?
    • 10. What are the different modes of asexual reproduction ?
    • 11. Draw a labelled diagram of female reproductive system and write the function of its different parts.
    • 12. What is contraception ? Give different methods of contraception.
    • 13. What happens in human female :
      • (a) when egg is fertilised ?
      • (b) when egg is not fertilised ?
    • 14. Trace and explain the steps involved in the formation of seed.
    • 15. Which one is the edible part in kale, kohlrabi, broccoli, cabbage and cauliflower ?
    • 16. Name a recessive trait which is quiet common in human beings.

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