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CLASS X BIOLOGY PRE BOARD 2017-2018(Sri Sri Academy)

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Harsh Kumar
Sri Sri Academy (SSA), Kolkata
1st to 10th Science

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Time: 2 Hours SRI SRI ACADEMY PRE BOARD EXAMINATION SESSION 2017-2018 CLASS X Subject: - Biology (Science Paper 3) Max Marks 80 GENERAL INSTRUCTIONS: Answer to this paper must be written on the paper provided separately. You will not be allowed to write during 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 answers. Attempt all questions from Section I. Answer any four questions from Section II. The intended marks for questions or parts of questions are given in brackets [ ]. SECTION I (40 Marks) Attempt all questions from this section. Question 1. (a) Name the following: (i) The mucous membrane lining the uterus. (ii) The hormone secreted during first sign of pregnancy. (iii) The pollutant which reduces oxygen carrying capacity of blood. (iv) The first vaccine to be given to a new born exactly around 21 days after birth. (v) The process by which foetal abnormalities can be diagnosed. [5] (b) Define the following biological terms: (i) Haematuria. (ii) Guttation. (iii) Vasectomy. (iv) Antibiotics. (v) Implantation [5] (c) State the main function of the following: (i) Amniotic Fluid. (ii) IUCD.(iii) Lachrymal gland. (iv) Semilunar Valves. (v) Sunken stomata [5] (d) Give the exact location of the following: (i) Acrosome. (ii) Central canal. (iii) Uracil (iv) Basilar membrane. (v) Seminiferous tubules. [5] (e) State whether the following statement are true or false. If False rewrite the correct form of the statement by changing either the first or last word only [5] (i) Kidney converts ammonia into urea in the human body. (ii) Menstruation is the attainment age of sexual maturity in human females. (iii) Fertilization takes place in the human uterus. (iv) Testosterone is an androgen. (v) Erythrocytes plays a major role during blood clotting. (f) Identify the relationship between 1st and 2nd word and then similarly write the 4th word which forms the relationship with the 3 rd word.: [5] (i) Emergency hormone: Adrenaline :: Calorigenic hormone : ____________. (ii) Male : Condom :: Female : _____________. (iii) Cadmium : Itai- itai Disease :: Mercury : _____________. (iv) 5th -12th Day : Follicular Phase ::14th-28th Day : ____________________. (v) Rate of Water Uptake by Plants: Potometer :: Blood Pressure : ____________. P.T.O (g) There are five sets consisting of five terms given below. In each set there is a word which is an odd one. For each of these set identify the odd one out and state the category to which rest four belong as shown in example: [5] Example: (0) Cell wall, vacuole, centrosome, plastids, mitochondria. Answer: Sl.No Category Odd one 0 Organelles of Plant Cell Centrosome (i) Vagina, Vulva, Ureter, Ovaries, Uterus. (ii) CNS, PNS, SAN, SNS, ANS. (iii) Vasopressin, Thyroxine, Oxytocin, Somatotrophin, Prolactin. (iv) Cyton, Nephron, Axon, Dendron, Schwann Cells. (v) Temporal, Parietal, Occipital, Menstrual, Frontal. (h) State one point of difference on the basis of parameters indicated within brackets:[5] (i) Rods and Cones (Pigment Present). (ii) SAN and AVN ( Commonly called as). (iii) Myopia and Hypermetropia ( Position of image formed with respect to retina). (iv) Antiseptic and Disinfectant (Applicability). (v) Umbilical artery and Umbilical Vein (Type of Blood flowing through) SECTION II (40 Marks) Attempt any four questions from this Section. Question 2. (a) The figure given below represents a particular stage of cell division. Study it carefully and answer the questions that follows: (i) (ii) (iii) (iv) (v) (b) [5] Identify the stage of cell division with a reason. Label the parts 1 to 3. Name the component which forms part labelled 2 in plant cells. Name and draw a labelled diagram of the following stage. What had happened in the previous stage of the cell division? The diagram given below represents a certain physiological process in plants. Study the diagram and answer the question that follows:[5] P.T.O (i) Identify the physiological process investigated in the diagram. (ii) Define the physiological process as mentioned in the above question. (iii) What happens to the mercury column after few hours? Justify your observation (iv) State one advantage and one disadvantage of the process in plant life. Question 3. (a) A diagrammatic representation of the transverse section of a certain structure of a male mammal is shown below. Study the diagram and answer the question that follows: [5] (i) (ii) (iii) (iv) (v) Identify the structure Label the parts numbered 1 to 4. State a biological reason why this structure is located outside the abdominal cavity? Surgical removal of this structure leads to what accidental effect in male mammal? State the function of the parts labelled 2 and 3. (b) The diagram given below rerpresents a schematic representation of certain phenomenon. Study the diagram and answer the question that follows:[5] (i) Name the phenomenon. In which type of cell division this phenomenon occurs? (ii) State the biological significance of this phenomenon. (iii) How many chromosomes have been represented?. (iv) Name the parts labelled A and B. P.T.O. Question 4. (a) The diagram given below represents a certain important sense organ in humans. Study the diagram and answer the following questions: [5] (i) State two most important function of the above mentioned sense organ. (ii) Name the parts labelled 1 to 10. (iii) State the most important function of the parts labelled as 2,7 and 9 (b) A homozygous plant having Round (R) and Yellow (Y) seed is crossed with another homozygous plant having wrinkled (r) and green (y) seeds .Answer the question that follows:[5] (i) Give the scientific name of the plant on which Mendel conducted his hybridization experiments.. (ii) Give the genotype of First filial generation. (iii) Give the possible combination of gametes that can be obtained from F1 hybrid (iv) Using Punnett square deduce Phenotypic ratio. (v) State the law that can be enunciated in the above mentioned Genetic Cross. Question 5. (a) Study the Diagram given below and answer the questions that follows : [5] (i) Name the parts labelled 1 to 6. (ii) Name any two substances transported by the part labelled 2 to the foetus. (iii) State the function of part labelled 4 other than its endocrine function. (iv) Name the hormone secreted by part labelled 4. P.T.O (b) With reference to the diagram mentioned below ,answer the question that follows: [5] (i) Identify the plant physiological process mentioned above in the diagram. (ii) Give the balanced chemical equation of the above mentioned process. (iii) Name two plants which can be used as an alternative instead of pondweed. (iv) For each of the following parts give your answer in terms of bubble count:(a) If KCN (Potassium Cyanide) is added in the test tube. (b) If NaHCO3(Sodium Bicarbonate) is added in the test tube. (c) If pond water is replaced by Distilled Water. (d) If the experimental set up is placed in red light of visible Spectrum. (e) If crushed ice is added in the test tube. Question 6. (a) Study the diagram and answer the question that follows:- [5] (i) Name the organ systems which have been depicted in the diagram partially or completely. (ii) Name the parts labelled 1 to 5. (iii) Define the term Micturition. (iv) Name two organic components that flow through part labelled 3. (v) What is Uropoiesis? Name the three sequential steps of Uropoiesis. P.T.O (b) The diagram shown below represents the human heart in one of the process of activity. Study the same and then answer the question that follows:- (i) (ii) (iii) (iv) (v) Identify the phase . Give reason to support your answer. Name the parts labelled 1 to 6 as indicated by guidelines. Name the valves which are open and also state the name of the valves which are closed. What do the arrows indicated in the above mentioned diagrams? What type of heart sound is being perceived during the above mentioned phase with the help of stethoscope? How it is different from the other heart sound? Question 7. (a) Give a specific biological reason for the following:[5] (i) Nerve impulse is always unidirectional. (ii) Use of Biofertilizers is always preferred over chemical fertilizers. (iii)The sex of the child depends on his father. (iv) Sex education should be implemented from school level, particularly for adolescents. (v) Transpiration is the price paid for photosynthesis. (b) Draw a neat diagram of a typical Neuron and label at least six important parts [2] (c) With reference to the diagram mentioned below, answer the question that follows:-[3] (i) Name the parts labelled 1 to 6. (ii) State the function of the part labelled 2,4 and 6. ___________________xxxxxxxxxxxxxxxxxxxxxx_________________________

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