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1 SMT. SULOCHANADEVI SINGHANIA SCHOOL, THANE. Class Sub. Exam Date Marks Time Total No. of Printed sides Prelim 10.02.2017 80 2 hrs 6 II 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 [ ]. 10 Biology SECTION I [40 MARKS] Attempt all questions from this Section Question1. A. Name the following: - [5] i) The type of cell division which occurs in the cells of the reproductive organs. ii) A plant with sunken stomata. iii) That part of the chloroplast where the light reaction of photosynthesis takes place. iv) The phase of the cardiac cycle in which the auricles contract. v) The cell body of a nerve cell. B. Choose the correct answer for each of the four options given below: (i) A plant cell may burst when: A. Turgor pressure equalizes wall pressure. B. Turgor pressure exceeds wall pressure. C. Wall pressure exceeds turgor pressure. D. None of the above. (ii) BCG vaccine is effective against: A. Cholera B. Mumps C. Tuberculosis D. Measles (iii) Cretinism and Myxoedema are due to: A. Hypersecretion of thyroxin B. Hypersecretion of growth hormone C. Hyposecretion of thyroxin D. Hyposecretion of growth hormone (iv) After mitotic cell division, a female human cell will have: A. 44 + XX chromosome B. 44 + XY chromosome (v) C. D. The nephrons discharge their urine at the : A. Urinary bladder B. Urethra C. Renal pelvis D. Renal pyramid 22 + X chromosome 22 + Y chromosome [5]
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