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No of pages: 8 No. Of Questions-6 CLARENCE PUBLIC SCHOOL J. P. NAGAR, BENGALURU 78. FIRST PREPARATORY EXAMINATION FEBRUARY -2021 BIOLOGY X-ICSE Maximum Marks: 80 Reading Time: 09:45am 10:00am Writing Time: 10:00am 12:00noon Uploading Time: 12:00noon 12:30pm 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. _________________________________________________________________________ This Paper is divided into two Sections. 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) Question 1 a) Name the following: [5] i) The part of brain that transmits impulses from one part of cerebellum to the other ii) The process of uptake of mineral ions against the concentration gradient using energy from cell iii) The Hormone that stimulates the functioning of thyroid iv) The gland present in the eyes v) The wax like layer on the epidermis of leaves which reduces transpiration. b) Choose the odd one out and write the category to which other three belong: i) Cerebrum, cerebellum, Thalamus, Hypothalamus ii) Myopia. Hyperopia, colour blindness, astigmatism iii) Mitral valve, Sino atrial node, Aorta, pulmonary vein iv) Transpiration, Photosynthesis, Phagocytosis, Guttation v) Haemoglobin, Insulin, Iodopsin, Rhodopsin 1 [5] c) Given below are 5 terms each. In each case, arrange and rewrite each set so as to be in logical sequence [5] i) Lens, pupil, conjunctiva, yellow spot, cornea ii) Cochlea, tympanum, pinna, auditory canal, ear ossicles iii) S phase, karyokinesis, G1 phase, cytokinesis, G2 phase iv) Water molecules, oxygen, grana, photolysis, photons v) Hepatic artery, liver, aorta, hepatic portal vein, intestine d) Given below is an example of certain structures and their special functional activity with which it is concerned [5] Ex- Mitochondria and cellular respiration on similar terms, fill in the blanks i) Glucagon and ________________ ii) Ciliary muscles and ______________ iii) Sex hormones and _____________ iv) Phloem and ____________ v) Neutrophils and ________________ e) Choose the correct answer from the options given below: i) Guttation does not occur in one of these plants (a)Grass (b) tomato (c) Papaya (d) banana ii) One of the end product of photolysis is (a) O2 (b) H2O (c) C6H12O6 (d) CO2 2 [5] iii) Histamines are released by (a) Neutrophils (b) basophils (c) Monocytes (d) lymphocytes iv) A condition which can be due to presence of bile pigments in urine a) Kidney stones b) bacterial infection c) diabetes d) Jaundice v) Identify the conditioned reflex (a) blinking (b) coughing (c) writing (d) knee jerk f) Expand the following terms: i) TSH ii) ACTH iii) GH iv) ANS v) FSH [5] g) Note the relationship between the first two words and suggest a suitable word/words for the third or fourth place: [5] i) Mitosis: 2n :: Meiosis: _______ ii) Haemoglobin : iron :: chlorophyll : _______ iii) A blood group : b antibodies :: O blood group : _______ iv) Auricular systole : 0.15 secs :: ventricular systole : _______ v) Organ of cortii : Hearing :: _________ : dynamic balance 3 h) Correct the statements by changing the underlined words: [5] i) Normal pale colour of urine is due to presence of melanin ii) Two complementary nitrogenous bases are held together by nitrogen bonds iii) Squeezing of WBC through capillary wall is phagocytosis iv) Cataract is defect in the eye in old age when lens loses flexibility v) Ciliary muscle is responsible for change in size of pupil Section II (40 Marks) (Attempt any 4 questions) Question-2 a) Study the diagram given below and answer the questions that follow: Questions:i) Name the structure ii) Name the region in the kidney where this structure is present iii) Label the parts 1,2,3,4. iv) Name the process of urine formation happening here. v) Define the process vi) What do you call the filtrate entering into 3? 4 [5] b) Complete the following table by filling in the blank spaces 1to 10 Gland secretions Effect on body 1 Oestrogen 2 Beta cells of pancreas 3 4 5 6 Mental retardation in children Lachrymal gland 7 8 10 Acromegaly [5] 9 Question 3 a) Refer to the diagram given below and answer the following: [5] Questions:i) Label the parts 1 to 6 ii) What does the above diagram represent? Define it. iii) Name the fluid present in 4. b) Differentiate between the following according to criteria given in the bracket. i) Turgid cell and flaccid cell ( Tonicity of the surrounding solution) ii) LUBB and DUP (Names of the valves whose closure produces the sound) iii) Vasopressin and Insulin (Deficiency disorder) iv) Artery and vein ( functional difference) v) Mitosis and Meiosis ( occurrence) 5 [5] Question-4 a) The following diagrams show a phenomenon in plant cells. Study the same and answer the given questions: [5] Questions:i) Label the parts 1 to 6 ii) Name the phenomenon shown by the above diagrams iii) What is the condition of the cell in the diagram labelled C iv) How can you bring the cell in C to its original shape. Name the process b) Write the exact location of the following: i) Sino Atrial Node ii) Organ of corti iii) Hypothalamus iv) Lacrimal glands v) Loop of henle 6 [5] Question 5 a) The diagram signifies simplified pathway showing circulation of blood. Study the same and answer the questions that follow: [5] Questions:i) Label 1 to 4 ii) Which blood vessel ( Number and Name) will have least concentration of amino acids after a meal iii) Draw a neat labelled diagram to show the structure of blood vessel 2 and 8 iv) What is the significance of blood vessel labelled 6 b) Explain the following statements: [5] i) Adrenaline is called flight and fight hormone. ii) We feel our ears blocked during flight travel. iii) Some women display male characteristic features such as beard. iv) Valves are present in the veins and not in arteries. v) Some plants are able to perform photosynthesis in the night. 7 Question 6 a) Refer to the diagrams shown below and answer these questions [5] Questions:i) Label the parts 1,2,3, 4 ii) Differentiate arrangement of nerve cells in 1 and 4 iii) Which part affects body balance and coordination iv) Write the function of 3 v) Differentiate the cortex of 1 and 2 b) Answer the following questions: [5] i) Name the phases of cell cycle ii) Give 2 examples of neurotransmitters iii) What is adhesion iv) Define cardiac cycle v) Define Accommodation of eye _________________________ 8
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