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MOCK PAPER BIOLOGY

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MOCK TEST PAPER 3 ICSE Biology X General Instructions: Same as in Model Test Paper - 1. SECTION I (40 Marks) Attempt all questions from this Section Question 1. (a) Name the following: (i) Basic unit of heredity. (ii) Blood vessel that begins and ends in capillaries. (iii) Phase of Cardiac cycle in which the ventricles relax. (iv) Blood vessel leading into Bowman s capsule. (v) Photoreceptor helping in vision in dim light. [5] (b) Write major function of the following: (i) Coronary artery (ii) Vitreous humour (iii) Organ of corti (iv) Guard cells (v) Plasma membrane [5] (c) Copy and complete the following by filling the blanks 1 to 5 with appropriate words/terms/phrases: To test the leaf for starch, the leaf is boiled in water to ________. It is next boiled in methylated spirit to ________. The leaf is placed in warm water to ________ it. It is then placed in a dish and ________ solution is added. The regions containing starch turn ________. (d) Give the exact location of:(i) Mitral value. (ii) Henle s loop. (iii) Hydathodes. (iv) Cortex cells. (v) Substomatal space. [5] (e) Write the difference between the following pairs as indicated in brackets: (i) Antiseptic & disinfectant (definition). (ii) Monohybrid & dihybrid cross (phenotypic ratio). (iii) Transpiration & bleeding (definition). (iv) RBC & WBC (Shape). (v) Mitosis & Meiosis (No. of Chromosomes). [5] (f) Given below are three choices for each statement. Rewrite the correct answer: (i) Technical term for fertilized egg is: (A) Placenta (B) Zygote (C) Morula. Mock Test Paper 3 (ii) Salk s vaccine is used to build immunity against: (A) Tuberculosis (B) Typhoid (C) Poliomyelitis. (iii) Lens used to correct myopia is: (A) Convex (B) Concave (C) Cylindrical (iv) Ear ossicle is the term used for: (A) 3 tiny bones (B) Ear drum (C) Organ of Corti (v) Structure of eye which carries impulse from eye to brain is: (A) Auditory nerve (B) Optic nerve (C) Sensory neuron (g) Match the items of Column A to these of Column B and rewrite correct pairs: Column A 159 [5] Column B (1) DNA (a) Plasmolysis (2) Hypertonic solution (b) Sperm (3) Astigmatism (c) Concave lens (4) Node of Ranvier (d) Nucleotide (5) Aerosome (e) Neuron (f) Adenine (g) Cylindrical lens (h) Turgid cell (h) Answer the following briefly: (i) Three functions of WHO. (ii) Radioactive pollution sources. (iii) Name 3 meninges. (iv) Steps of clotting of blood. (v) Equations for light reaction. SECTION II [5] [5] (40 Marks) Attempt any four questions from this Section. Question 2. (a) Given alongside is a schematic representation of the Vena Cava circulatory system in man. Study the same and answer the questions that follow: (i) Label the parts 1 to 4 indicated in the diagram. 1 LA 4 (ii) Give one difference between the parts 1 and 2 2 based on: (1) Their structure Lungs 3 (2) The nature of blood flowing through them. (iii) What is the specific name of the type of blood circulation that takes place between the heart and the lungs? (iv) Name the valve found at the beginning of the part labelled 3. [5] 160 ICSE Biology X (b) Draw the diagram of human ear & label the following parts. (i) The structure which receives vibrations. (ii) An ear ossicle attached to inner ear. (iii) Hearing organ. (iv) Structure responsible for dynamic equilibrium. (v) Nerve communicating from ear to brain. Question 3. (a) Given alongside is a diagram of the external features of the heart. (i) Name the parts 1 to 7. (ii) What happens if the coronary artery gets an internal clot? (iii) What type of blood does 5 carry? (iv) Mention one structural difference between 5 and 4. [5] [5] 1 7 6 Right atrium Right ventricle 5 2 Coronary artery 3 4 (b) Fill in the blanks with appropriate term. (i) A non degradable pollution is ___________. (ii) The period for complete development of foetus till birth is termed ___________. (iii) ___________ is the part cut & ligated in vasectomy. (iv) ___________ is an anticoagulant. (v) ___________ is the causative agent of AIDS. [5] Question 4. (a) (i) Draw a well labelled diagram of a neuron showing following parts: Perikaryon, Dendrites, Axon, Node of Ranvier, Myelin sheath. (ii) Differentiate between sensory & motor neuron. (iii) Differentiate between the arrangement of cyton & axon in brain & spinal cord. [5] (b) The following diagram shows an experimental set-up to demonstrate a process going on in green leaves. Both surfaces of leaf B were coated with vaseline while leaf A was untouched. Observe the diagram and answer the questions. Stand Spring balance A B Leaf Test-tube (i) What is the experimental demonstrating? (ii) What is the purpose of coating of leaf B with vaseline on both surfaces? (iii) What will be the observation after a few hours? (iv) Give a suitable explanation for the observation. Question 5. (a) Give reasons for the following: (i) Pitutary gland is also called master gland. (ii) Male is responsible for determination of sex of a child. [5] Mock Test Paper 3 (iii) Mouth begins to salinate at the sight of tasty food. (iv) Plants growing in well watered soil are found to wilt on a hot day. (v) Gametes are formed by meiosis. (b) Complete the following table by filling in the blanks 1 to 10 with the appropriate terms: S.No. Gland 1. 2. 3. 4. 5. 1 Adrenal 5 Lachrymal 9 Secretion 161 [5] Function / Effect on body Testosterone 2 3 4 6 Influences metabolism of cells 7 8 Growth hormone 10 [5] Question 6. (a) A well-watered, healthy potted plant with variegated leaves was kept in darkness for about 24 hours. It was then set up as shown in the diagram and exposed to light for about 12 hours. At the end of this time, leaf X and leaf Y were tested for starch. Study the diagram and answer the questions that follows: (i) Why was the plant initially kept in darkness for 24 hours? (ii) What is the function of sodium hydroxide solution in the flask? (iii) Select the correct leaf from the five available choices shown in the diagram as A, B, C, D and E. Rewrite the correct answer by filling in the appropriate letter for the questions that follow. Leaf Y (1) After the starch test, leaf X would look like _______. (2) After the starch test, leaf Y would look like _______. (iv) The experiment with leaf Y shows that photosynthesis requires the presence of certain factors. Mention any one factor. [5] (i) Draw a labelled diagram of mitosis metaphase stage in a plant cell with 4 chromosomes. (ii) Name the 4 nitrogenous bases. [5] (iii) Name the 2 nucleic acids. Fig. EExperimental set-up for photosynthesis Question 7. (a) Name the following: (i) The conducting vessel through which water moves up. (ii) The pressure exerted by the cell contents on that cell wall. (iii) Hormone that controls basal metabolic rate. (iv) Hormone associated with lactation & parturition in mammals. (v) A component responsible for depletion of ozone layer. [5] (b) Explain the following terms briefly. (i) Reflex action. (ii) Double circulation. (iii) Passive immunity. (iv) Sex chromosome. (v) Malpighian capsule. [5]

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