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ICSE class 10 Biology Previous Year Question Paper 2018

Biology is one of the crucial subjects in ICSE Class 10. ICSE Class 10 Biology speaks about the cell as the basic unit of life, genes, and evolution. It deals with how living organisms interact with the environment, including the behaviour of living beings. TopperLearning is one of the premier online platforms that helps students of ICSE Class 10 study various biology concepts.

All the content resources are carefully created by experienced and qualified faculty members who have handled students with their studies and aided in clarifying their academic doubts through the ‘UnDoubt’ platform. Get access to these crucial student-centric resources through ICSE Class 10 Plans.

ICSE Class 10 Test section consists of MCQs, SAQs types of questions, which will help boost the practice required for related exams.

Question 1

(a) Name the following:

  1. The organization which procures and supplies blood during an emergency.
  2. The blood vessel which supplies blood to the liver.
  3. The number of chromosomes present in a nerve cell of a human being.
  4. The layer of the eyeball that forms the transparent cornea.
  5. The wax-like layer on the epidermis of leaves which reduces transpiration.
(b) Choose the correct answer from each of the four options given below:

(i) The number of spinal nerves in a human being are:

  1. 31 pairs
  2. 10 pairs
  3. 21 pairs
  4. 30 pairs

(ii) Which one of the following is non-biodegradable?

  1. DDT
  2. Vegetable peel
  3. Cardboard
  4. Bark of trees

(iii) Aqueous humour is present between the:

  1. Lens and Retina
  2. Iris and Lens
  3. Cornea and Iris
  4. Cornea and Lens

(iv) A strong chemical substance which is used on objects and surfaces in our surroundings to kill germs:

  1. Cresol
  2. Carbolic acid
  3. Iodine
  4. Mercurochrome

(v) Which one of the following is a greenhouse gas?

  1. Oxygen
  2. Methane
  3. Sulphur dioxide
  4. Nitrogen


(c) Complete the following paragraph by filling in the blanks (i) to (v)with appropriate words:

To test a leaf for starch, the leaf is boiled in water to (i) _______________, It is then boiled in Methylated spirit to (ii)___________. The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (iii) ________________ solution is added. The region of the leaf which contains starch, turns (iv) _______________ and the region which does not contain starch, turns (v) ____________________.


(d) Match the items given in Column A with the most appropriate ones in Column B and ewrite the correct matching pairs.

(e) Correct the following statements by changing the underlined words:

  1. Normal pale yellow colour of the urine is due to the presence of the pigment Melanin.
  2. The outermost layer of meninges is Pia mater.
  3. The cell sap of root hair is Hypotonic.
  4. Xylem transports starch from the leaves to all parts of the plant body.
  5. Nitrogen bonds are present between the complementary nitrogenous bases of DNA.

(f) Choose between the two options to answer the questions specified in the brackets.

Example: Corolla or Calyx (Which is the outer whorl?) Answer: Calyx

  1. Blood in the renal artery or renal vein (Which one has more urea?)
  2. Perilymph or endolymph (Which one surrounds the organ of Corti?)
  3. Lenticels or stomata (Which one remains open always?)
  4. Sclerotic layer or choroid layer (Which one forms the Iris?)
  5. Blood in the pulmonary artery or pulmonary vein (Which one contains less oxyhaemoglobin?)

(g) Given below is a representation of a type of pollution.
Study the picture and answer the questions:


  1. Name the type of pollution shown in the picture.
  2. Name one source of this pollution.
  3. How does this pollution affect human health?
  4. Write one measure to reduce this pollution.
  5. State one gaseous compound that leads to the depletion of the ozone layer and creates ‘ozone holes’.

(h) Choose the ODD one out from the following terms given and name the CATEGORY to which the other belong:
Example: Nose, Tongue, Arm, Eye
Answer: Odd Term – Arm, Category – Sense organs

  1. Detergents, X-rays, sewage, oil spills
  2. Lumen, muscular tissue, connective tissue, pericardium
  3. Dendrites, medullary sheath, axon, spinal cord
  4. Centrosome, cell wall, cell membrane, large vacuoles
  5. Prostate gland, Cowper’s gland, seminal vesicle, seminiferous tubules.


Question 2

(a) The diagram given below represents a stage during cell division.
Study the same and answer the questions that follow:

  1. (i) Identify whether it is a plant cell or an animal cell.
    Give a reason in support of your answer.
  2. Name the stage depicted in the diagram.
    What is unique feature observed in this stage?
  3. Name the type of cell division that occurs during:

    1. Replacement of old leaves by new ones.
    2. Formation of gametes.

  4. Mitosis and meiosis (number of daughter cells formed)
  5. Pure and hybrid strains (definition)

(b) Mention the exact location of the following:

(i) Epididymis
(ii) Lacrimal gland
(iii) Malleus
(iv) Hydathodes
(v) Pulmonary semilunar valve


Question 3
(a) Given below are diagrams showing the different stages in the process of fertilization of an egg in the human female reproductive tract.
Study the diagrams and answer the questions:


  1. Arrange the letters given below each diagram in logical sequences to show the correct order in the process of fertilization.
  2. Where does fertilization normally take place?
    What is ‘Implantation’ that follows fertilisation
  3. Mention the chromosome number of the egg and zygote in humans.
  4. Explain the term ‘Gestation’. How long does Gestation last in humans?
  5. Draw neat, labelled diagram of a mature human sperm.

(b) A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. Observe the diagram and answer the questions.

  1. What aspect of photosynthesis is being tested in the above diagram?
  2. Represent the process of photosynthesis in the form of a balanced equation.
  3. Why was the plant kept in the dark before beginning the experiment?
  4. What will be the result of the starch test performed on leaf ‘A’ shown in the diagram?
    Given an example of a plant with variegated leaves.
  5. Draw a neat labelled diagram of a chloroplast

Question 4

(a) The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:

  1. Name the phenomenon that is depicted in the diagram. Define the phenomenon.
  2. Give the technical term for the point of contact between the two nerve cells.
  3. Name the parts numbered 1, 2 and 3.
  4. How does the arrangement of neurons in the spinal cord differ from that of the brain?
  5. Mention two ways by which the spinal cord is protected in our body.

(b) Give appropriate biological or technical terms for the following:

  1. Process of maintaining water and balance in the blood.
  2. Hormones which regulate the secretion of other endocrine glands.
  3. Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.
  4. The condition in which a pair of chromosomes carry similar alleles of a particular character.
  5. The complex consisting of a DNA strand and a core of histones.
  6. The onset of menstruation in a young girl.
  7. Squeezing out of white blood cells from the capillaries into the surrounding tissues.
  8. The fluid which surrounds the foetus.
  9. The relaxation phase of the heart.
  10. The difference between the birth rate and the death rate.

Question 5

(a) The diagram given below is that of a structure present in a human kidney.
Study the same and answer the questions that follow:

  1. Name the structure represented in the diagram.
  2. What is the liquid entering part ‘1’ called?
    Name two substances present in this liquid that are reabsorbed in the tubule.
  3. What is the fluid that comes to part ‘2’ called?
    Name the main nitrogenous waste in it.
  4. Mention the three main steps involved in the formation of the fluid mentioned in (iii) above.
  5. Name the substance which may be present in the fluid in part ‘2’ if a person suffers from Diabetes mellitus.

(b) Differentiate between the following pairs on the basis of what is indicated in the brackets.

  1. Leaf and Liver [form in which glucose is stored]
  2. ATP and AIDS [expand the abbreviations]
  3. Testosterone and Oestrogen [organ which secretes]
  4. Ureter and Urethra [function]
  5. Hypotonic solution and Hypertonic solution [condition of a planet cell when placed in them]

Question 6

(a) Given below is a diagram of a human blood smear.
Study the diagram and answer the questions that follow:


  1. Name the compound numbered ‘1’ to ‘4’.
  2. Mention two structural differences between the parts ‘1’ and ‘2’.
  3. Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
  4. What is the average lifespan of the component numbered ‘1’?
  5. Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain.

b) Give biological explanations for the following:

  1. Education is very important for population control.
  2. The placenta is an important structure for the development of a foetus.
  3. All the food chains begin with green plants.
  4. Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.
  5. We should not put sharp objects into our ears.

Question 7

(a) The diagram below represents a process in plants.
The setup was placed in bright sunlight. Answer the following questions:


  1. (Name the physiological process depicted in the diagram.
    Why was oil added to the water?
  2. When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant?
    Give a suitable reason for your answer.
  3. What happens to the level of water when this setup is placed in:
    1. Humid conditions?
    2. Windy conditions?
  4. Mention any three adaptations found in plants to overcome the process mentioned in (i).
  5. Explain the term ‘Guttation’.
(b) A pea plant which is homozygous for Green pods which are inflated [GGII] is crossed with a homozygous plant for yellow pods which are constricted [ggii]. Answer the following questions:
  1. Give the phenotype and genotype of the Fi generation. Which type of pollination has occurred to produce Fi generation?
  2. Write the phenotypic ratio of the F1 generation.
  3. Write the possible combination of the gametes that can be obtained if two F1 hybrid plants are crossed.
  4. State Mendel’s law of ‘Segregation of Gametes’.
  5. What is the scientific name of the plant which Mendel used for this experiment on inheritance?

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