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ICSE Class X Sample / Model Paper 2024 : Biology

6 pages, 80 questions, 29 questions with responses, 55 total responses,

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December 24, 2023 Max. Marks: 80 ICSE X BIOLOGY (Science Paper 3) Preliminary Assessment I SET A [As per the scope of syllabus 2023 2024] Time: 2 Hrs. General Instructions 1. You will not be allowed to write during the first 15 minutes. This time is to be spent in reading the question paper. 2. The time given at the head of this paper is the time allowed for writing the answers. 3. 4. Section A is compulsory. Attempt any four questions from Section B. The intended marks for questions or part of questions are given in brackets []. SECTION A (40 Marks) [Attempt all questions from this Section] Question 1 Select the correct answers to the questions from the given options: (Do not copy the question. Write the correct answer only) (i) The chromosomes which are exactly similar and bear same gene at same loci: (a) heterologous (b) hemizygous (c) homologous (d) heterozygous (ii) (a) (c) [15] The process of expulsion of semen from the urethra is called: insemination (b) ejection urination (d) ejaculation (iii) A hormone secreted in female to facilitate parturition: (a) progesterone (b) testosterone (c) oxytocin (d) FSH and LH (iv) In tall trees, most of the transpiration occurs through: (a) lenticels (b) cuticle (c) bark (d) stomata (v) (a) (c) The hyposecretion of which hormone causes cretinism in children: Vasopressin (b) Oxytocin Adrenal (d) Thyroid (vi) Assertion (A) : Reason (R) : Page |1 The phenomena involving the movement of plant part in response to touch is called thigmotropism. Plants such as sweet peas, Cuscuta and vines have tendrils which coil around other parts in response to one sided contact or touch. December 24, 2023 (a) (c) Both A and R are true A is true and R is false (b) (d) Both A and R are false R is true and A is false (vii) The blood cells produced abnormally in leukemia are: (a) RBCs (b) WBCs (c) Thrombocytes (d) None of the above options (viii) Harish was slide studying the representing a stage of mitotic cell division. After some time, he found that the slide was showing metaphase stage This was due to: (a) chromosomes were arranged at the equatorial plate (b) chromosomes were placed at the opposite ands (c) chromosomes appeared as chromatin network (d) chromosomes became visible as long fine (ix) The outermost layer of meninges is: (a) grey matter (c) pia mater (b) (d) dura mater arachnoid membrane (x) (a) (c) (b) (d) manometer Garreau s potometer Root pressure can be measured by: sphygmomanometer respirometer (xi) The components, which become pollutant when their concentration reaches beyond a threshold value. (a) quantitative pollutant (b) primary pollutant (c) secondary pollutant (d) qualitative pollutant (xii) Reflexes that are inborn and inherited from parents: (a) acquired reflexes (b) Natural (unconditional) reflexes (c) both (a) and (b) (d) none of the above (xiii) Convex lens is used instead of concave lens to correct the eye defect hypermetropia. Which of the following reasons makes it a correct choice? P. Convex lens converges the light rays. Q. With the use of convex lens image is formed on the retina R. Concave lens converges the light rays: (a) only P (b) only P and Q (c) only P and R (d) only R (xiv) The cell component cell division is visible only during: (a) mitochondria (b) chloroplast Page |2 December 24, 2023 (c) chromosomes (d) chromatin (xv) Lata was pregnant with her first child. Her mother-in-law was asking her to take healthy diet for the nourishment of the developing baby. Which of the following is/are involved in the process described above (Nourishment of baby)? 1. Uterus 2. Vagina 3. Oviduct 4. Ovaries (a) only 1 (b) only 1 and 3 (c) only 1, 3 and 4 (d) only 1, 2 and 3 Question 2 [i] Name the following: (a) The gland whose secretions are transported by blood. (b) Phenomenon of simultaneous focusing of an object in both eyes (c) Blood vessels that get collapsed when empty. (d) The anti-senescence hormone. (e) The condition opposite to flaccid. [ii] (a) (b) (c) (d) (e) Arrange and rewrite the terms in each group in the correct order so as to be in a logical sequence beginning with the term that is underlined: Cytokinesis, G2-phase, Karyokinesis, S-phase Reabsorption, Filtration, Secretion, Excretion Eardrum, Sound waves, Vibration, Impulse Loss of water, Transpiration, Stomata closed, Stomata flaccid Sensory neuron, Receptor, Spinal cord, Motor neuron. [5] [5] [iii] Fill in the blanks with suitable words: [5] Blood platelets are produced in ____(a)____. Their average life is ____(b)____. They get destroyed in the ____(c)____. They initiate ____(d)____ at the site of bleeding. They produce ____(e)____ which in the presence of calcium converts prothrombin of plasma into thrombin. [iv] Choose the odd one out from the following terms and name the category to which others belong: (a) Glucocorticoids, Mineralocorticoids, Glucagon, Sex corticoids. (b) Thrombin, Fibrinogen, Thrombosis, Fibrin. (c) Loudspeaker, Amplifier, Music, Dust. (d) Needles, Pesticides. Dressings, Syringes, (e) Oil spills, Kitchen waste, Detergent, Excreta. Page |3 [5] [v] December 24, 2023 Match the items given in Column I with the most appropriate ones in Column II and rewrite the correct matching pairs: [5] Column I (a) (b) (c) (d) (e) Insulin Hyperthyroidism Gigantism Glucagon Adrenaline 1. 2. 3. 4. 5. 6. 7. Column II Over-secretion of GH -cells of Islets of Langerhans Exophthalmic goitre Increases heartbeat Under-secretion of GH -cells of Islets of Langerhans Cretinism SECTION B (40 Marks) Attempt any four questions from this Section Question 3 (i) Briefly explain the term phenotype. (ii) Can there by DNA replication without cell division? (iii) In case of marriage between a a normal haemophilic man and homozygous woman, what is the probability that their daughter will be haemophilic? (iv) Differentiate between cohesion and adhesion. (v) Draw a neat and labelled diagram of the structure of DNA. Question 4 (i) Mention the exact location of ovaries. (ii) Why is the progeny always tall when a tall pea plant is crossed with a short pea plant? (iii) Differentiate between primary reproductive organs and accessory reproductive organs. (iv) Give two control measures of global warming. (v) Draw a neat and labelled diagram of Malpighian capsule. Question 5 (i) Explain biomedical waste. (ii) Write any two major reasons for the population explosion in the world. (iii) A potted plant with destarched leaves is taken, and then a leaf was covered with a black paper strip. This plant is then placed in the sunlight for few hours. After that the covered leaf was plucked and tested for the presence of starch. What will be your observation after the starch test? (iv) The male gametes are produced in structure A of testis. Then they are stored in B where they mature and become motile. Name the structures A and B. (v) The diagram given below are the cross-sections of blood vessels: Page |4 [1] [2] [2] [2] [3] [1] [2] [2] [2] [3] [1] [2] [2] [2] [3] December 24, 2023 (a) (b) (c) Identify the blood vessels A, B and C. Name the parts labelled 1 to 3. Name the type of blood that flows through A. Question 6 (i) Give the exact location of pituitary gland. (ii) Give two differences between stomata and hydathodes. (iii) What is thigmotropism? Give one example. (iv) Explain sex-determination in human. beings by giving schematic diagram. (v) Study the diagrams given below show steps involved in testing the leaf for the presence of starch and answer the questions that follows. (a) (b) (c) [3] Why the leaf is boiled in alcohol (methylated spirit)? Why iodine solution is poured on the leaf? What is destarching of leaves? Question 7 (i) Study the diagram given below and answer the questions that follow: (a) Identify the labels A, B, and C (b) Name the basic filtration unit present in the kidney. (c) Structure which stores urine until it is passed out. Page |5 [1] [2] [2] [2] [3] (ii) (iii) (iv) (v) Expand DCT. Mention the two principles through which Lamarck explained his ideas. Differentiate between condom and diaphragms. Name the filtering unit of the kidney and why is it called so? December 24, 2023 [1] [2] [2] [2] Question 8 (i) Define ascent of sap. (ii) Name the type of cell division that occurs during. (a) growth of shoot (b) formation of pollen grain (iii) Wilted lettuce leaves if kept in cold water become crisp. Explain by giving suitable reason. (iv) Mention the reactions of the following. (a) Photolysis of water (b) Photophosphorylation (v) When pea plants with pure round yellow (RRYY) seeds were crossed with pure wrinkled green (rryy) seeds, hybrid pea plants with round yellow (RrYy) seeds were produced. Based on this information answer the following questions: (a) Define law of independent assortment. (b) What will be the phenotypic ratio of F -generation? (c) What will be two new combinations in F2-generation? Page |6 [1] [2] [2] [2] [3]

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