Solving ICSE Class 10 Biology Previous Year Question Papers ICSE Class 10 Biology Question Paper 2017 is the best way to boost your preparation for the board exams.
ICSE Class 10 Biology Question Paper 2017 Solved
Time : (One hour and a half)
General Instructions :
- Answers to this Paper must be written on the paper provided separately.
- You will not be allowed to write during the first 15 minutes.
- This time is to be spent in reading the Question Paper,
- The time given at the head of this Paper is the time allowed for writing the answers.
- Attempt all questions from Section I and any four questions from Section II.
- The intended marks for questions or parts of questions are given in brackets [ ].
Section – I (40 Marks)
(Attempt all questions from this section)
(a) Name the following : 
(i) The process by which root hairs absorb water from the soil.
(ii) The organ which produces urea.
(iii) The kind of lens required to correct Myopia.
(iv) The pituitary hormone which stimulates contraction of uterus during child birth.
(v) The international health organisation which educates people in accident prevention.
(iii) Concave/Diverging lens
(v) Red Cross
(b) Choose the correct answer from each of the four options given below : 
(i) The prime source of chlorofluorocarbons is
(A) Vehicular emissions
(B) Industrial effluents
(C) Domestic sewage
(D) Refrigeration equipment
(D) Refrigeration equipment
(ii) Penicillin obtain from a fungus is
(iii) Marine fish when placed in tap water bursts because of
(iv) Surgical method of sterilization in a woman involves cutting and tying of
(v) Synthesis phase in the cell cycle is called so, because of the synthesis of more :
(B) RNA and proteins
(c) The statements given below are incorrect. Rewrite the correct statement by changing the underlined words of the statements.
(i) The Graafian follicle, after ovulation turns into a hormone producing tissue called Corpus callosum.
(ii) Deafness is caused due to the rupturing of the Pinna.
(iii) Gyri and Sulci are the folds of Cerebellum.
(iv) Free movement of solutes in and out of the cell takes place across the cell membrane.
(v) The solvent used to dissolve the chlorophyll pigments while testing a leaf for starch is Soda lime.
(i) The Graafian follicle, after ovulation turns into a hormone producing tissue called Corpus luteum.
(ii) Deafness is caused due to the rupturing of the Tyumpanum/Ear drum.
(iii) Gyri and Sulci are the folds of Cerebrum.
(iv) Free movement of solutes in and out of the cell takes place across the cellwall.
(v) The solvent used to dissolve the chlorophyll pigments while testing a leaf for starch is methylated spirit.
(d) Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence.
Example : Large intestine, Stomach, Mouth, Small intestine, Oesophagus.
Answer : Mouth → Oesophagus → Stomach → Small intestine → Large intestine.
(i) Fibrin, Platelets, Thromboplastin, Fibrinogen, Thrombin.
(ii) Cochlea, Malleus, Pinna, Stapes, Incus.
(iii) Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron.
(iv) Uterus, Parturition, Fertilisation, Gestation, Implantation.
(v) Caterpillar, Snake, Owl, Frog, Green leaves.
(i) Platelets → Thromboplastin → Thrombin → Fibrinogen → Fibrin.
(ii) Pinna → Malleus → Incus → Stapes → Cochlea.
(iii) Receptor → Sensory neuron → Spinal cord → Motor neuron → Effector.
(iv) Fertilisation → Uterus → Implantation → Gestation → Parturition.
(v) Green leaves → Catterpillar → Frog → Snake → Owl.
(e) Choose the ODD one out of the following terms given and name the CATEGORY to which the others belong: (5)
(i) Aqueous humour, Vitreous humour, Iris, Central canal
(ii) Formalin, Iodine, DDT, Lime
(iii) ACTH, TSH, ADH, FSH
(iv) Phosphate, RNA, Sugar, Nitrogenous base
(v) Bile, Urea, Uric acid, Ammonia
|(i) Central canal
|Parts of eye
Harmones of anterior lobe of pituitary.
Components of nucleotide.
Nitrogenous waste excreted with urine.
(f) Given below are groups of terms. In each group the first pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis. 
Example : Oxygen: Inspiration:: Carbon dioxide : Expiration.
(i) Eye Optic nerve : Ear : ……………….
(ii) Cytoplasm : Cytokinesis :: Nucleus : ……………….
(iii) TT : Homozygous : Tt : ……………….
(iv) Foetus : Amnion : : Heart: ……………….
(v) Adenine : Thymine :: Cytosine : ……………….
(i) Auditory curve.
(g) Match the items given in Column A with the most appropriate ones in Column B and rewrite the correct matching pairs.
|Column A||Column B|
3. DNA and histones
4. Euro norms
5. Diabetes mellitus
|— dynamic body balance
— static body balance
— vehicular standards
|Column A||Column B|
3. DNA and histones
4. Euro norms
5. Diabetes mellitus
|—Static body balance
— Vehicular standards
(h) The diagram given below represents the location and structure of an endocrine gland. Study the same and answer the questions that follow :
(i) Name the endocrine gland shown in the diagram.
(ii) Name the secretion of the gland which regulates basal metabolism.
(iii) Name the mineral element required for the synthesis of the above mentioned hormone.
(iv) Name the disease caused due to under secretion of the above mentioned hormone in children.
(v) Name the disease caused due to hypersecretion of the above mentioned hormone.
(i) The endocrine gland shown is the thyroid gland.
(ii) The secretion of the gland which regulates basal metabolism is thyroxine.
(iii) The mineral element required is iodine.
(iv) The disease caused due to under secretion of the hormone in children is cretinism.
(v) The disease caused due to hypersecretion of the above mentioned hormone is exopthalmic goitre.
Section – II (40 Marks)
(Attempt any four questions from this section)
(a) Study the diagram given below which represents a stage during the mitotic cell division and answer the questions that follow : 
(i) Identify the stage giving suitable reasons.
(ii) Name the parts numbered 1 and 2.
(iii) What is the technical term for the division of nucleus ?
(iv) Mention the stage that comes before the stage shown in the diagram. Draw a neat labelled diagram of the stage mentioned.
(v) Which is the cell division that results in half the number of chromosomes in daughter cells ?
(i) The stage is Telophase. The reasons are as follows :
(a) Chromatids thin out in the form of chromatin fibres,
(b) Nucleoli and nuclear membrane reappear,
(c) the cleavage furrow has started deepening.
- Nuclear membrane
(iii) The technical term for division on nucleus is Karyokinesis.
(iv) The stage which comes before the stage shown in the diagram is Anaphase.
(v) The cell division that results in half the number of chromosome in daughter cells is meiosis.
(b) Differentiate between the following pairs on the basis of what is mentioned within brackets : 
(i) Active Transport and Diffusion [significance in plants]
(ii) Demography and Population density [Definition]
(iii) Antibiotic and Antibody [Source]
(iv) Renal cortex and Renal medulla [Parts of the nephrons present]
(v) NADP and ATP [Expand the abbreviation]
(i) Active Transport
Absorption of certain ions which serve as nutrients and maintain high osmotic pressure for absorbing water.
Gaseous exchange across stomata in processes like transpiration, respiration and photosynthesis.
It is the statistical study of human population with reference to size, density, distribution and other vital statistics.
It is the number of individuals per square kilometre at any given time.
Antibiotic are chemical substances produced by certain micro-organisms, e.g. Penicillium produces penicillin.
Antibody are special chemicals found in the blood and produced by a type of specialised lymphocytes on exposure to antigens.
(iv) Renal cortex
Malpighian capsule, PCT and DCT lies in renal cortex.
Loop of Henle lie in the renal medulla.
Nicotinamide adenine dinucleotide phosphate
(a) The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diaf’tam and answer the miestions that follow : 
(i) What is the state of the cell shown in the diagram ?
(ii) Name the structure that acts as a selectively permeable membrane.
(iii) Label the parts numbered 1 to 4 in the diagram.
(iv) How can the above cell be brought back to its original condition ? Mention the scientific term for the recovery of the cell.
(v) State any two features of the above plant cell which is not present in animal cells.
(i) The state of the cell is plasmolysed/extreme flaccidity.
(ii) The structure that acts as a selectively permeable membrane is cell membrane or plasma membrane.
- . – Cell wall
- – Strong sugar solution
- – Cell membrane
- – Nucleus
(iv) The cell can be brought back to its original condition by putting it in a hypotonic environment/ pure water.
(v) The two features present in a plant cell is, (a) presence of large vacuole (b) Chloroplast. These are not present in animal cell.
(b) Give below is a representation of kind of pollution. Study the same and answer the questions that follow: 
(i) Name the kind of pollution.
(ii) List any three common sources of this pollution.
(iii) Mention three harmful effects of this pollution on human health.
(iv Explain the term‘Pollutant’.
(v) Name two soil pollutants.
(i) The kind of pollution is noise pollution.
(ii) Three common sources of noise pollution are
(a) Industrial machines
(c) Automobiles on the street and trains.
(d) Jet aircrafts
(iii) Three harmful effects of noise pollution are :
(a) Disturbs sleep and leads to nervous irritability.
(b) Lowers efficiency of work as it affects concentration of thought.
(c) Prolonged loud noise can lead to deafness as it may damage the ear drum or tympanum.
(iv) A Pollutant is any such constituent which causes pollution, e.g. dust, smoke.
(v) Two soil pollutants
(a) Industrial waste
(b) Chemical fertilizers
(a) The diagram given below represent the relationship between a mouse and a physiological process that occurs in green plants. Study the diagram and answer the questions that follow : 
(i) Name the physiological process occurring in the green plant that has kept the mouse alive.
(ii) Explain the physiological process mentioned above.
(iii) Why did the mouse die in bell jar B ?
(iv) What is the significance of the process as stated in (i) for life on earth ?
(v) Represent the above mentioned physiological process in the form of a chemical equation.
(i) The physiological process occurring in the green plants is photosynthesis.
(ii) Photosynthesis is a process by which living plant cells containing chlorophyll produce an organic food substance glucose from carbon dioxide and water by using light energy and release oxygen as a by-product.
6CO2 + 12H2O C6H12O6 + 6H2O + 6O2 ↑
(iii) The mouse as well as the burning candle utilised the oxygen present inside the air in the bell jar. Both the processes going on inside the bell jar liberated carbon dioxide. No living organism can survive in an environment of carbon dioxide. So the mouse died.
(iv) The significance of the process is as follows :
(a) Provides food for all organisms – All animals and even human beings depend on plants for food either directly or indirectly. In any food chain the starting point is always a green plant (producer).
(b) Provides oxygen – The life supporting gas oxygen is present in the atmosphere in a free, stable form. This is utilised by living organisms.
(c) Carbon dioxide and oxygen proportion in the atmosphere is maintained.
(b) Mention the exact location of the following : 
(i) Prostate gland
(ii) Myelin sheath
(iii) Islets of Langerhans
(iv) Semi-circular canals
(v) Eustachian tube
(i) It is present around the urethra when it emerges from the bladder.
(ii) In most neurons the axon is surrounded by a white insulating sheath known as myelin sheath.
(iii) These are special groups of hormone secreting cells present in the entire pancreas.
(iv) It is present in the inner ear in a set of three which are arranged at right angles to each other.
(v) It is present in the middle ear which connects the cavity of the middle ear to the throat.
(a) The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow : 
(i) Label the parts numbered 1 to 3 in the diagram.
(ii) In which part of the testis are the sperms produced ?
(iii) State the functions of the parts labelled 1 and 3 in the diagram.
(iv) Name the cells that secrete Testosterone.
(v) Draw a neat, labelled diagram of a sperm.
- Sperm duct/Vas deferens.
(ii) Sperms are produced in the seminiferous tubules.
- The scrotum or scrotal sac is a thin walled maintains a temp of 2 – 3°C less than body temp, for the maturation of the sperm.
- It helps to store the sperms during which they mature and become motile.
(iv) The cells which secrete testosterone are Leydig cells.
(b) Give biological reasons for the following statements : 
(i) Some woman have facial hair like beard and moustache.
(ii) Cutting of tree should be discouraged.
(iii) In some xerophytes leaves are modified into spines.
(iv) There is frequent urination in winter than in summer.
(v) The left ventricle of the heart has a thicker wall than the right ventricle.
(i) In some mature women there can be an overgrowth of the adrenal cortex. This leads to hyper-secretion of cortisone which behave like sex hormone and the women develop certain male characteristics such as beard and moustache.
(ii) Cutting down of trees should be discouraged because deforestation may lead to many problems like droughts, flash flood, soil erosion, extinction of several wild animals and a threat of extinction of hundreds of species. So in order to keep the environment unharmed the cutting of trees should be avoided.
(iii) Xerophytes live in an environment where there is less water or scarcity of water. So in some xerophytes the leaves are modified into spines in order to stop or cut down transpiration. This prevents too much of water loss and saves the plants.
(iv) During winter there is no perspiration. Hence there is less water reabsorption from the glomerular filtrate resulting in more volume of urine. Hence, there is frequent urination in winter than in summer.
(v) The right ventricle pumps blood only to the lungs for oxygenation, whereas the left ventricle pumps blood to the farthest points in the body, like up to the toes in the feet or up to the brain against gravity. So the left ventricle of the heart has thicker walls than the right ventricle.
(a) The diagram given below represents a section of the human heart. Answer the questions that follow : 
(i) Which parts of heart are in the diastolic phase ? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them ?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’ ?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
(i) The ventricles of the heart are in diastolic phase because the figure shows flow of blood from auricles to ventricles. Here tricupsid and bicupsid values are open / semilunar values are closed.
- Pulmonary Artery : Type of blood which flow through them are deoxygenated blood.
- Pulmonary artery : The type of blood which flows through them is oxygenated.
(iii) During ventricular systole the tricuspid and bicuspid valves close with a faint sound known as ‘LUBB’. During venticular diastole the semilunar valves at the roots of aorta and pulmonary artery close with a sharp sound ‘DUP’.
(iv) The blood vessel that supply oxygenated blood to the heart muscles is coronary artery.
(b) Give appropriate biological/technical terms for the following : 
(i) The type of immunity that exists in our body due to our genetic makeup.
(ii) The suppressed allele of a gene.
(iii) The accessory gland in human males whose secretion activates the sperms.
(iv) An apparatus that measures the rate of water uptake in a cut shoot due to transpiration.
(v) The kind of twins fonned from two fertilised eggs.
(vi) A pair of corresponding chromosomes of the same size and shape, one from each parent.
(vii) The mild chemical substance which when applied on the body kills germs.
(viii) The type of waste generated in hospitals and pathological laboratories.
(ix) The antiseptic substance in tears.
(x) Cellular components of blood containing haemoglobin.
(iii) Seminal vesicle
(v) Fraternal twins
(vi) Homologous chromosomes
(viii) Biomedical waste
(x) Red blood cells/Erythrocyte
(a) In a homozygous pea plant, axial flow’ers (A) are dominant over terminal flowers (a). 
(i) What is the phenotype and genotype of the F, generation if a plant bearing pure axial flowers is crossed with a plant bearing pure terminal flowers ?
(ii) Draw a Punnett square board to show the gametes and offsprings when both the parent plants are hetrozygous for axial flowers.
(iii) What is the phenotypic ratio and genotypic ratio of the above cross shown in (ii) ?
(iv) State Mendel’s Law of Dominance.
(v) Name two genetic disorders commonly seen in human males.
(i) Phenotype of F1 – Hyterozygous axial flowers
Genotype of F1 – Aa (Heterozygous)
(iii) Punnett square
Phenotypic ratio – 3 : 1
Genotypic ratio – 1 : 2 : 1
(iv) Law of Dominance states that out of a pair of contrasting characters present together in the F, hybrid, only one is able to express itself while the other remains suppressed. The one that is expressed is the dominant character and the one that is suppressed is the recessive character.
(v) Two genetic disorders commonly in male :
(a) Colour blindness
(b) The diagram given below is an external view of the human brain. Study the same and answer the questions that follow : 
(i) Name the parts labelled A, B and C in the diagram.
(ii) State the main functions of the parts labelled A and B.
(iii) What are the structural and functional units of the brain ? How are the parts of these units arranged in A and C ?
(iv) Mention the collective term for the membranes covering the brain.
(v) What is the function of Cerebrospinal fluid ?
(i) A – Cerebrum
B – Cerebellum
C – Spinal cord
(ii) A – controls our thinking, reasoning, memory, consciousness, will power, all voluntary actions and sensory actions.
B – functions to maintain balance of the body and coordinates muscular activity.
(iii) The structural and functional units of the brain is neuron.
The arrangement in A is the axons on the inner side (white matter) and cyton/perikaryon on the outer side (grey matter).
The arrangement in C is the axons on the outer side (White matter) and cy ton/perikaryon on the inner side (grey matter).
(iv) The collective term for the membranes covering the brain is meninges.
(v) The cerebrospinal fluid acts like a (a) cushion to protect the brain from shocks, (b) it also maintains the temperature and pressure inside the brain.