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INFANT JESUS ANGLO INDIAN HIGHER SECONDARY SCHOOL, Tangasseri KOLLAM. STD: X. SECOND MODEL EXAMINATION, January 2016. Time: 2hrs BIOLOGY Marks: 80. Attempt all questions from Section A and any four questions four questions from Section B. The intended marks for the questions or parts of questions are given in brackets [ ]. Section A (40 marks) Attempt all questions from this section Question 1 a) Name the following: [5] 1. One combined vaccine given to babies to build immunity against three common diseases. 2. The structure formed after the release of ovum from Graafian follicle. 3. A plant having sunken stomata. 4. The ear ossicle attached to the oval window of the inner ear. 5. The blood plasma from which the protein fibrinogen has been removed. b) Complete the following statements: [5] 1. ______ is the scientific name of the garden pea plant which Mendel used for his experiments. 2. The disease caused in children due to under secretion of thyroxine is ______. 3. The surgical method of sterilization in males is known as ______. 4. Raisins swell up when kept in a ______ solution. 5. The element required for the clotting of blood is ______. c) Choose the correct answer from each of the four options given below: 1. After mitotic cell division, a human female cell will have: (A) 44 + XX chromosome. (B) 44 + XY chromosome. (C) 22 + X chromosome. (D) 22 + Y chromosome. 2. The antibiotic penicillin is obtained from: (A) Protozoan. (B) Bacteria. (C) Virus. [5] (D) Fungus. 3. The dorsal root ganglion of the spinal cord contains cell bodies of the: (A) Motor neuron. (B) Sensory neuron. (C) Intermediate neuron. (D) Association neuron. 4. The part of the nephron which lies in the renal medulla is: (A) Glomerulus. (B) Proximal convoluted tubule. (C) Loop of Henle. (D) Distal convoluted tubule. 5. A plant is kept in a dark cupboard for about 48 hours before conducting any experiment on photosynthesis is to: (A) Remove starch from the plant. (B) Ensure that the starch is not translocated from the leaves. (C) Remove chlorophyll from the leaf of the plant. (D) Remove starch from the experiment leaf. d) Mention, if the following statements are true or false. If false, rewrite the wrong statements to its correct form by changing the first word or the last word only: [5] 1. Colour blindness is a Y linked inheritance. 2. Plasmolysis makes the cell turgid. 3. Deafness is caused due to the rupturing of the pinna. 4. Dettol is an antiseptic. 5. Fertilization of the ovum takes place in the vagina. e) State the exact location of each of the following structures: 1. Spleen. 2. Pancreas. 4. Organ of Corti. 5. Hydathodes. [5] 3. Seminal vesicle.
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