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LOKHANDWALA FOUNDATION SCHOOL PRELIMINARY EXAMINATION -2020-2021 SUBJECT: SCIENCE -3 (BIOLOGY) Date: 22.01.20 21 Duration: 2 Hrs. Grade: 10 Max. Marks: 80 _____________________________________________________________________________________________ General Instruction: 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 A and any four questions from Section B. The intended marks for questions or parts of questions are given in brackets [ ].This paper consists of 5 printed sides. _____________________________________________________________________________________ SECTION A (40 marks) (Compulsory) Question 1. A. Name the following: [5] i. The substance which capture photons in plants. ii. The hormone secreted by -cells of Islets of Langerhans. iii. The process of passing out of urine from the body. iv. The point of attachment of two chromatids. v. The iron containing pigment in erythrocytes. B. Choose the correct option form the four options given below: i. Our memory weakens if this part is injured: a. Medulla b. Pons c. Cerebellum d. Cerebrum ii. Hepatic portal system connects: a. Digestive system to liver b. Kidney to liver c. Liver to digestive system d. Liver to kidney iii. On a hot summer day, plant cooling is due to a. Loss of water vapour from leaves b. Transport of water in plants c.Loss of liquid water d. Loss of water from entire plant. iv. When a cell is fully turgid, which of the following will be zero a. Osmotic pressure b. Turgor pressure c. Wall pressure d. Suction pressure v. The beating of the heart of man is heard on the left side because a. The left ventricle is towards the left side b. Both the ventricles are towards the left side c. Contraction of heart is powerful on the left side d. The dorsal aorta is on the left side. [5] C. Correct and rewrite the statements by changing the biological term that is underlined for each statement: [5] i. Raisins swell up when placed in a medium which is hypertonic solution. ii. Rods enable us to see the three primary colours. iii. Diapedesis is the process of engulfing harmful microbes by white blood cells. iv. Iodine is the essential element constituent of chlorophyll. v. Deafness is caused due to rupturing of the pinna. D. Identify the ODD term in each set and name the CATEGORY to which the remaining belong three belong: [5] i. Pleura, Pericardium, Meninges, Spinal cord. ii. Adenine, Guanine, Creatinine, Cytosine iii. ACTH, TSH, ADH, FSH. iv. Myopia, Hypermetropia, Xerophthalmia, Astigmatism. v. Stomata, Hydothodes, Phloem, Lenticel.
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