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1 Biology FM 80 SECTION I (40 Marks) Attempt all questions from this section Question 1 (a) Name the following: [5] (i) Process of conversion of several molecules of glucose to one molecule of starch. (ii) The type of lens used to correct myopia. (iii) The stage in which separation of sister chromatids takes place. (iv) The hormone that stimulates the entire sympathetic nervous system. (v) The division of kidney which is light in colour and subdivided into conical renal pyramids. (b) Explain the following terms: [5] (i) Reflex action (ii) Plasmolysis (iii) Diapedesis (iv) Pulse (v) Photophosphorylation (c) Choose the correct answer from the options given below: [5] (i) After mitotic cell division, a male human cell will have: A. 44 + XX chromosomes B. 44 + XY chromosomes C. 22 + X chromosomes D. 22 + Y chromosomes (ii) If we spray phenyl mercuric acetate on the surface of leaves, it will result in: A. Increase respiration B. Increase photosynthesis C. Reduce transpiration D. Reduce respiration (iii) The organ of corti is located on which membrane of ear: A. Basilar membrane B. Tectorial membrane C. Tymphanic membrane D. Reissner s membrane (iv) A pulse wave is mainly caused by the A. Systole of atria B. Diastole of atria C. Systole of the left ventricle D. Systole of the right ventricle (v) The common passage for sperm and urine in the male reproduction system is: A. Ureter B. Seminal vesicle C. Urethra D. Vas deferens (d) Give the exact location of the following: [5] (i) Corpus callosum (ii) Iris (iii) Thyroid gland (iv) Pulmonary semilunar valve (v) Organ of Corti (e) State the main function of the following: [5] (i) Cerebrospinal fluid (ii) Lenticels (iii) Vitreous humour (iv) Medulla oblongata (v) Ureter (f) Write the category and the odd one out [5] (i) Haemoglobin, Glucagon, Iodopsin, Rhodopsin Time 2 hours (ii) Urethra, Uterus, Urinary bladder, Ureter (iii) Transpiration, Photosynthesis, Phagocytosis, Guttation (iv) Cyton, Photon, Axon, Dendron (v) Oxytocin, Insulin, Prolactin, Progesterone (g) Differentiate between the following pairs on the basis of what is mentioned within brackets: [5] (i) Turgor pressure and wall pressure (explain) (ii) Bowman's capsule and Malpighian capsule (parts included) (iii) Leaf and liver (form in which glucose is stored) (iv) Cerebrum and spinal cord (arrangement of neurons) (v) Cranial and spinal nerves (total number in adults) (f) Complete the following table by filling in the numbered blanks with an appropriate term/answer: [5] Gland Hormone Function produced Thyroid 3. 1. Vasopressin 2. 4. 5. 6. Adrenal medulla 9. 7. Promotes glucose utilization by the body cells. 8. Oestrogen 10. SECTION II [40 Marks] Attempt any four questions from this section Question 2 A. Answer the following questions: [5] (i) Mention three significant changes that occur in a cell during interphase. (ii) What is the importance of chiasma formation? (iii) What is the difference between chromatin fibre and chromosome? (iv) Meiosis maintains the chromosome number in a species constantexplain. B. Study the diagram given below which represents a stage during mitotic cell division and answer the questions that follow: [5]
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