» Class X Biology : CBSE Sample Question Papers

1. Define parthenogenesis.
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2. What are nastic movements?
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3. What do ECG and EEG stands for?
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4. Explain the process of ‘absorption’ for controlling gaseous pollutants present in the air.
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5. How is water content and ion concentration maintained in the body of an animal? What is this process known as?
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6. How has overpopulation been the cause of deforestation? Mention two such causes.
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7. What are the essential features of Reproductive Health? Mention them.
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8. Define reflex action. Depict the reflex action with the help of labelled sketch.
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9. Describe the following: (i) Homologous organs, (ii) Analogous organs, and (iii) Vestigial organs.
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10. Answer the following:
(i) Define aerobic and anaerobic respirations. (ii) Depict them with the help of the equations. (iii) Mention two differences between the two types of respiration.
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1. What is the name given to the digestive juice produced in the small intestines of man? Name it.
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2. Define chemotropism. Give one example which exhibit chemotropism.
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3. What are the terms used for female gamete and male gamete in animals?
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4. Explain the process of translocation of food in plants.
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5. What are the roles played by crop and gizzard in the alimentary canal of grass¬hopper?
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6. Explain the following terms: (i) Universal donor, and (ii) Universal recipient, concerned with transfusion of blood.
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7. Name the three types of nervous systems found in man. Mention the functions performed by each system.
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8. Make a labelled diagram of male reproductive system.
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9. How is sex inherited in man? Explain. Name one organism which exhibit the same mode of sex inheritance.
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10. Define occupational diseases. Discuss the various occupational diseases you have studied.
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1. Why does food not enter trachea when we swallow food?
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2. What type of asexual reproduction is exhibited by Plasmodium? What is the main feature of this type of reproduction?
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3. There are about 30,000 to 40,000 characters observed in human beings and only 23 pairs of chromosomes. How are genes distributed and located on a chromo¬somes?
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4. What type of cells are red blood corpuscles? Describe them. Explain the function they perform.
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5. What do you understand by the terms: (i) Haploid, and (ii) Diploid?
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6. Explain any two methods of disposal of solid waste.
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7. What do you understand by ‘conservation of natural resources’ and ‘preservation of natural resources’? Mention the law meant for ‘protection of forests’ and the year in which it was implemented.
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8. How does exchange of gases occur in roots, stems and leaves of a plant? Explain.
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9. What is fertilisation? How many types of fertilisations occur in animals? Name and explain them.
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10. Mention the names and the functions of the hormones released by the pituitary gland.
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1. Define evolution.
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2. What type of nervous system is observed in Cnidarians?
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3. Name the process by which food is digested by Amoeba.
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4. How does gravity and sudden change in the direction of the gas flow separates the particulate pollutants?
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5. Why is DNA considered as the most perfect tool in genetic engineering? Explain.
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6. How does temperature determines sex in some organisms? Explain. Name the organisms in which this phenomenon occurs.
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7. Mention the characteristics of potable water.
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8. How is control and coordination brought by phytohormones in plant? Explain by taking suitable examples.
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9. What role is played by the bile juice and pancreatic juice in the duodenum?
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10. Why is there a need for clotting of blood? Explain the process with the help of a schematic representation of the process.
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1. Name one unicellular organism and one multicellular organism which multiplies by budding.
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2. Hormones from endocrine glands are poured into which blood, arterial or venous, to be carried to target organ.
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3. Does arterial blood supplying to kidney, carry more nitrogenous waste or the vein leaving the kidney?
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4. What is synapse?
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5. How is protein digested in the stomach?
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6. Write any three practices to control air pollution.
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7. What practices should be adopted to protect soil erosion?
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8. Mention the changes which occur in the following organs during menstrual cycle (i) ovary, (ii) uterus, (iii) vagina.
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9. Answer the following:
(i) Who discovered blood groups in human beings?
(ii) What is the criteria of determining blood groups?
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10. Draw a labelled diagram of the human male reproductive system.
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1. What is placenta?
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2. Which phenomenon is exhibited by plants when they move towards light?
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3. Define the process of assimilation.
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4. What are chlorofluorocarbons? How do they affect the environment?
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5. Mention three secondary sexual characteristics in human male.
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6. Name a gland present in our body which is both endocrine and exocrine. Mention the hormones produced by the glands and the function they perform.
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7. Write any three steps you would take for sustainable development.
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8. What is transpiration? Is it needed by plants? Justify your answer.
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9. How does digestion occurs in duodenum? Explain.
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10. Define the following terms:
(i) Genetics (ii) Evolution (iii) Vestigial organs
(iv) Fossils (v) Homologous organs.
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1. Where is bile juice produced and stored in the human body?
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2. Name the tissues which transports water and synthesise food in plants.
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3. What are homologous organs?
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4. Name the gases responsible for greenhouse effect. How is green house effect caused? What are its effects?
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5. Where does light reaction of photosynthesis occurs in the chloroplasts of the leaves? Explain the structure of a granum. Which structure connects one granum to the other in the chloroplast? (2)
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6. Write any three steps that you would take for sustainable development of the environment.
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7. Describe the events occurring during rhythmic contraction and relaxation of heart muscles during a heart beat.
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8. Explain the following:
(i) Why are testes and ovaries considered as the primary sex organs? (ii) Why is vagina called as ‘birth canal’? (Hi) Why are vas deferenses long in the reproductive system of human males?
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9. Mention the characteristics of a gene.
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10. Explain the structure of the forebrain of man. Mention the types of stimuli controlled by the parts of the brain.
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1. Define parasitic mode of nutrition. Give one example of an organism which exhibit this type of nutrition.
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2. What are homologous organs? Give example of such organs.
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3. What is the function of Medulla oblongata present in the brain?
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4. Explain the process of exchange of gases between the cells of the tissue and the blood brought by the arteries.
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5. What are the advantages of recycling of the material?
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6. Name the organs of excretion of earthworm. How do they remove the nitrogenous waste products?
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7. Make a labelled sketch of the human heart.
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8. Name the receptors through which we take the stimulus of sound, smell and light, i.e., sight. How do these receptors function?
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9. What is pollination? Describe the types of pollination which occur in plants.
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10. What are occupational disorders? Explain them.
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1. Name the photoreceptors present in the leaves by which plant respond to photoperiodic stimulus, and (ii) photosynthesis.
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2. What does UASB stand for?
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3. What are alveoli? What function do they perform?
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4. Name the tissue involved in translocation of food. Describe the process of translocation.
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5. A bunch of-capillaries are present in the Bowman’s capsule of the nephron in the human kidney. What is this bunch of capillaries known as? Name the blood vessel which forms it. What function does it perform?
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6. Mention the organs of the central nervous system. Where are they situated in our body? How are they protected?
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7. Mention three sexually transmitted diseases other than AID. Mention the symptoms caused by the STD diseases.
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8. Mention the similarities which are observed in the behaviour of Mendel’s factors, genes and chromosomes.
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9. Mention the causes of the following: (i) Acid rain, (ii) Bioaccumulation, and (iii) Silicosis.
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10. Define respiration. Name and define the types of respiration exhibited by living organisms. Write the equation for both the types of respirations.
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1. Name the type of chromosomes in which the centromere is near the middle and the two arms are almost equal in length.
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2. Which organs in human body produce haploid cells through the division of diploid cells?
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3. Why do we categorise asbestosis as an occupational hazard?
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4. How is acid rain formed? Mention any one of its harmful effects other than the corrosion of monuments.
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5. Excessive nutrients in the sewage flowing into the water bodies may lead to the death of fishes and other aquatic animals. Why will it happen so?

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What is meant by the term ’sustainable development? Suggest any two ways to achieve it.
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6. Write the effect of sympathetic nervous system on the following: (i) Heart, (ii) Blood vessels, (Hi) Bronchi, (iv) Eyes, (v) Gastric secretion, and (vi) Urinary bladder.
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7. Define transpiration. How does transpiration help in upward movement of water from roots to leaves? Draw a diagram of the part of the leaf from which trans¬piration takes place.
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8. Why is blood circulation in human heart called double circulation? Explain briefly. How is ‘Pace maker’ helpful to a heart patient?
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9. Differentiate between breathing and respiration. Explain clearly how the air is inhaled and exhaled during breathing in humans.
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10. What are the two vital functions of the human kidney? Draw labelled diagram of human urinary system. Name the procedure used in the working of an artificial kidney.
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