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ICSE Class X Prelims 2025 : Biology (Pawar Public School (PPS), Hadapsar, Pune)

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Ayush Gojamgunde
Pawar Public School (PPS), Hadapsar, Pune
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PAWAR PUBLIC SCHOOL, KANDIVALI FIRST PRELIMINARY EXAMINATION (2024-2025) SUBJECT: BIOLOGY (SCIENCE PAPER 3) GRADE: 10 DATE: 09/12/2024 MARKS: 80 TIME: 2 HOURS Answers to this paper must be written on the answer script provided by the school. 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 the paper is the time allowed for writing the answers. Section A is compulsory. Attempt any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ]. This paper consists of 8 printed pages. SECTION A (Attempt all questions from this Section) Question 1 Choose the correct answers to the given questions from the given options: (Do not copy the question, write the correct answers only.) (i) (ii) (iii) [15] While studying about erythrocytes, Neha understood that they are the oxygen carriers in human body and lack mitochondria. Which of the following justify this fact about erythrocytes? (a) Surface area reduces for haemoglobin. (b) Tissue cells can use maximum oxygen. (c) Carbon dioxide can be removed efficiently. (d) Blood glucose can be used by erythrocytes. The average cranial capacity of the modern man is: (a) 350 cc (b) 580 cc (c) 1100 cc (d) 1450 cc Which of the following set represents the correct sequence of a reflex arc? (a) Associated neuron, effector, dorsal root ganglion, receptor, ventral root ganglion (b) Ventral root ganglion, receptor, associated neuron, dorsal root ganglion, effector (c) Effector, dorsal root ganglion, receptor, associated neuron, ventral root ganglion (d) Receptor, dorsal root ganglion, associated neuron, ventral root ganglion, effector Page 1 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 (iv) The Swachh Bharat Abhiyaan, a cleanliness campaign, was officially launched by Indian Government on (a) 7th November, 2013 (b) 11th July, 2016 (c) 23rd March, 2015 (d) 2nd October, 2014 (v) The exudation of cell sap from injured parts of a plant is termed as __________. (a) Active transport (b) Diffusion (c) Bleeding (d) Evaporation (vi) Assertion (A) Eustachian tube transmits air currents from auricle to tympanum. Reason (R) Eustachian tubes helps to equalize air pressure on either side of tympanum allowing it to vibrate freely (a) Both Assertion and Reason are true (b) Both Assertion and Reason are false (c) Assertion is true and Reason is false (d) Assertion is false and Reason is true (vii) The recessive allele of any character is always expressed in (a) F2 generation (b) Heterozygous condition (c) Y-linked inheritance (d) F1 generation (viii) Select the correct full form of NADP from the following options. (a) Nicotinamide aldehyde dinucleotide phosphate (b) Nicotinamide adenosine dinucleotide phosphate (c) Nicotinamide adenine dinucleotide phosphate (d) Nicotinamide acetamide dinucleotide phosphate (ix) If 1 Epinephrine 2 Pituitary gland 3 Adrenal glands 4 Adrenocorticotropic, then select the correct pathway of hormone secretion from the options given below. (a) 3 1 2 4 (b) 2 4 3 1 (c) 1 2 4 3 (d) 4 3 1 2 (x) The number of chromosomes present in a human gamete cell will be _____. (a) 22 autosomes and one allosome (b) 22 pairs of autosomes and one pair of allosome (c) 23 autosomes and one pair of allosome (d) 23 pairs of autosomes and one allosome Page 2 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 (xi) When we leave a theatre hall after watching a movie using a well-lit exit lobby, the pupils of our eyes __________ and the __________ pigment bleaches to adjust our vision. (a) Dilate; Iodopsin (b) Constrict; Rhodopsin (c) Dilate; Rhodopsin (d) Constrict; Iodopsin (xii) The plant hormone used to speed up the malting process in the brewing industry is (a) Ethylene (b) Auxin (c) Abscisic acid (d) Gibberellin (xiii) All of the following are reasons for population explosion in India except (a) More children contribute towards household income (b) High number of death cases in infants (c) Acceptance of small family policy (d) Male child preferred over female (xiv) Insulin is produced by: (a) Delta cells of the pancreas (b) Gamma cells of the pancreas (c) Beta cells of the pancreas (d) Alpha cells of the pancreas (xv) Assertion (A): In dialysis, it is necessary to ensure that the water content of the patient s blood is not disturbed. Reason (R): The osmotic pressure of the dialysis fluid is same as that of the patient s blood. (a) A is True, and R is false. (b) A is False, and R is true. (c) Both A and R are true. (d) Both A and R are false. Question 2 (i) State the exact location for each of the following structures. (a) Spleen (b) Lacrimal gland (c) Pituitary gland (d) Kidneys (e) Hydathodes [5] (ii) Write the scientific term for each of the following statements. [5] (a) The liquid waste material produced by factories. (b) Shrinkage of protoplasm when a cell is kept in a hypertonic solution. Page 3 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 (c) The statistical study of human population. (d) The alternative forms of an inheritable feature of an organism. (e) A chart made of the artificially arranged chromosomes according to their shape and size. (iii) Given below is the diagram of human male reproductive system. Match the structures marked (a) to (e) with their correct functions. For example: f 6. Passes urine into urinary bladder Functions Human male reproductive system 1. Secretion acts as lubricant 2. Passes sperms into urethra 3. Temporary storage of sperms for maturation 4. Secretion neutralizes the acidity of vagina 5. Provides suitable temperature for sperm formation 6. Passes urine into urinary bladder 7. Site for spermatogenesis (iv) Arrange and rewrite the terms in each group as per the criteria mentioned in the bracket in the correct order so as to be in a logical sequence. [5] (a) Guard cells become hypotonic, Exosmosis of water, Efflux of K+ ions, ATP utilized (Closure of stomata at night) (b) Chromatin, Nucleosome, DNA, Chromosome (Condensation of genetic material during cell division) (c) Atrioventricular node, Purkinje fibres, Sinoatrial node, Bundle of HIS (Pathway of heartbeat impulse) (d) Cornea, Vitreous humour, Macula lutea, Lens (Pathway of light rays in the eye) (e) Ovulation, Uterus, Ovary, Oviduct (Movement of female gamete) (v) Complete the analogy given below by filling the blanks with correct answers. [5] (a) Ear lobe in humans: Attached : : Seed colour in pea plant: __________ (b) Platelets: Thrombokinase : : ___________: Histamine (c) Fully Erect posture: Homo sapiens : : Bent kneed posture: __________ (d) Menopause: Cessation of menstruation : : __________: Onset of menstruation (e) Heart: Rib-cage : : Spinal cord: __________ Page 4 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 SECTION B (Attempt any four questions from this Section) Question 3 (i) What is meant by the term insulin shock ? [1] (ii) As seen in the picture below, James and Anna are 4-year-old twins who resemble each other to a great extent. But, why are they of different gender? [2] (iii) Study the diagram of the cross section of the leaf given below and answer the following [2] questions. (a) Which process will be affected if part labelled 1 is very thick? (b) State the role of part labelled 4 in the leaf. (iv) Due to some visibility issues, Nina visited an eye doctor. In the check-up, she was able to recognize the letters shown on the screen without the help of any extra lenses. However, she described that some part of letter image appeared blurred as seen in the diagram alongside. Based on this information answer the following questions: [2] (a) State the cause for the eye defect Nina has. (b) How can this defect be corrected? (v) Study the simplified pathway of human circulatory system given below and answer the questions that follow. [3] (a) Name the chamber of the heart which pumps blood into blood vessel numbered 8. (b) Which blood vessel in the above diagram will have high amount of glucose and amino acids after a meal? (c) Differentiate between blood vessels numbered 4 and 6 with respect to their function. Page 5 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 Question 4 (i) Name the three membranous protective coverings of the brain from the innermost to the outermost. [1] (ii) Given below is the diagram of physiological process occurring in plants. Answer the following questions based on the diagram. [2] (a) Why did the mouse die in set-up 1 but survived in set-up 2? (b) Represent the physiological process under study in set-up 2 in the form of a balanced chemical equation. (iii) While trekking through the lush green hilly areas of Kashmir, Ankit noticed quite a few adults with visible swollen necks due to goitre. Explain giving reasons why was this condition commonly seen by Ankit. [2] (iv) In a species of animals, the presence of spots on the fur is controlled by a single gene N . [2] Presence of the even one dominant allele results in no spots on the fur while presence of two recessive alleles result in spots on the fur. Using Punnett square, find the phenotypic ratio of offsprings when a heterozygous female animal is crossed with male animal having spots on the fur coat. (v)The following image shows a person holding an envelope at a distance to read the address. With the help of a well labelled ray diagram, show how the eye defect shown below can be rectified using a suitable lens. [3] Page 6 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 Question 5 (i) What is heredity? [1] (ii) The grass growing in the shade under a stone turns yellowish. Give scientific reason. [2] (iii) Differentiate between the phytohormones IAA and ABA with respect to their full forms and one function of each in plants. [2] (iv) Write scientific reason for the following statement: [2] When a container is fully filled with soaked seeds and the lid is closed, the closed container bursts open with a great pressure after 5-6 hours. (v) Study the diagram below and answer the questions that follow: [3] (a) Write the scientific term for the period of development of the foetus in the womb. (b) How does part 3 facilitate the nourishment to the growing foetus in the mother s womb? (c) State any one function of part 1 in fetal development. Question 6 (i) Define the term sustainable development. [1] (ii) Write the statement for the principle Use and disuse proposed by Lamarck. Write any two examples of vestigial organs in man [2] Explain the following terms. [2] (iii) (a) Speciation (b) Sanitary landfills (iv) Answer the following questions based on the genetic diagram shown alongside. (a) Name the phenomenon shown and the type of cell division in which this phenomenon occurs. (b) How is a chromosome different from a chromatid? (v) [2] Robert Wadlow, known as the tallest man in history, was 8 feet 11 inches tall due to a medical [3] condition related to endocrine system. Answer the following questions based on this information. a) Identify the condition and name the hormone involved. b) State the cause for the tall height of Robert Wadlow. c) What are the symptoms seen in children with hypothyroidism? Page 7 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3 Question 7 (i) Mention any two changes that take place in an animal cell in the G1 phase of interphase. [1] (ii) Meera, a 15-year-old sprinter, is participating in a 100-meter race. State the part of autonomic nervous system involved and its effect on her body structures in the following situations. Organ (a) (b) Heart Salivary glands [2] Situation While waiting for the referee s clap at the starting line. After the race is over, when she is sitting down to take rest. (iii) Identify and draw well labelled diagrams of the following white blood cells of human body. [2] (a) WBC associated with allergy and which appears dark red on staining. (b) WBC which transform into a macrophage at site of infection. (iv) Answer the following questions based on the diagram of an environmental concern shown below. [2] (a) Elaborate on how has the phenomenon occurring at step 4 impacted the Earth s climate. (b) State an ill effect of this phenomenon on the environment. (v) Draw a neat and well labeled diagram of the human male gamete. [3] Question 8 (i) Enlist the structures that constitute the hindbrain in humans. [1] (ii) IUD is a female contraceptive method which can help in family planning. Elaborate. [2] (iii) A person walks clumsily after consuming too much alcohol. Give reason. [2] (iv) Draw a well-labelled diagram of the part of nephron involved in ultrafiltration step of urine formation. [2] Answer the following questions based on the inner ear diagram given below: [3] (v) (a) Write the collective term for part 1. (b) What is the audio receptor region of part 2 called? (c) When a person spinning around suddenly stops, they tend to feel dizzy. Explain how part 3 is responsible for causing dizziness. Page 8 of 8 PPSK 24-25/10/ BIOLOGY SCIENCE Paper - 3

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