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BIOLOGY BOARD EXAMINATION REVISION Section I Attempt all the questions in this Section. Question 1 (a) Name the following: 1. The allotropic form of oxygen. 2. The process in which part of blood plasma is filtered out under pressure through the glomerulus into the Bowman s capsule. 3. A small erectile, equivalent of male penis situated in front of the urethral opening. 4. Aggregates of nerve cells from which nerve fibres may arise. 5. A general term used for any poisonous substance produced by an animal. 6. The pressure developed in the roots due to the inflow of water. 7. The enzyme which converts prothrombin into thrombin. 8. The receptors of taste of the tongue and smell of the nose. 9. The cells of the testes that produce the male hormone. 10. Groups of histone molecules surrounded by DNA strands. (b) Copy and complete the following by filling in the blanks numbered 1-5 with appropriate words/terms/phrases: In cholera, the patient suffers from ______ and ______. His intestines are unable to absorb water into the blood. The result is that his kidneys reabsorb almost all water from the urine in the _______ and with it even the urea. The immediate treatment is to replenish water in the blood by _______ drip or by giving _______ through mouth. (c) Given below are five sets with four terms each. Identify the odd one from the set and state the category to which it belongs: 1. Mercurochrome, boric acid, formalin, iodine. 2. Nausea, skin pigmentation, loss of weight, weakness. 3. Clitoris, Labia minora, labia majora, follicle. 4. Polymerisation, Phosphorylation, activation of chlorophyll, splitting of water. 5. Condom, Copper T, Diaphragms, Spermicidal agents. (d) The given diagram shows a cross section of a part of root showing cell to cell water conduction. Study the diagram carefully and answer the question that follows: 1. 2. 3. 4. 5. Show the conduction of water from the root hair to the part A using the letters only. Identify the parts G and B. Write the function of Part A and B. Explain the forces contributing to the ascent of sap. State the cause: (a) Root pressure (b) Guttation.
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