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ICSE Class X Prelims 2022 : Biology (Don Bosco Academy (DBA), Patna)

4 pages, 97 questions, 14 questions with responses, 14 total responses,

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Don Bosco Academy (DBA), Patna

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1 Don Bosco Academy, Patna Send Up Examination 2021-22 Biology STD X Mark -80 Time 2 hrs Section I ( 40 Marks) Attempt all questions from this section. Question 1 A. Name the following. (5) 1. The mineral necessary for the clotting of blood. 2. Point of attachment of chromatids of a chromosome. 3. The pressure responsible for guttation in plants. 4. Minute pores located on the bark of woody stem. 5. The pigment that gives characteristic colour to urine. B. State the exact location of the following. ( 5) i. Urinary bladder ii. Pacemaker iii. Endothelium iv. Hydathodes v. Spleen C. Choose the odd one from the following sets of terms and write the category of other three. (5) a. Phosphate, Thiamine, pentose sugar, adenine. b. eosinophil, monocyte, neutrophil, basophil. c. Coronary artery, hepatic artery, pulmonary artery, renal artery. d. Malpighian capsule, PCT, Henle s Loop, DCT. e. Large leaf, fewer stomata, thick cuticle, sunken stomata. D. Match the items in Column A with the most appropriate in column B. Re write the matching pair. (5) Column A Column B Cytosine Vasopressin vacuole Guanine sunken stomata Adenine Myocardial infarction Turgidity ADH Nerium Coronary thrombosis pelvis E. Choose the correct answer from the four options given below. (5) a. The Scientist who discovered the chromosomes. (Walther Flemming, Watson and Crick, Rosalind Franklin, Robert Hooke) b. Pulse wave is caused due to:(systole of left atria, systole of right atria, systole of left ventricle, systole of right ventricle) c. An inorganic component of urine: (Urea, ammonia, uric acid, creatinine) d. A vessel through which colurless fluid circulate. (blood capillary, lymph vessel, artery, Vein) e. Absorption of water by dry hydrophilic substance. (Osmosis, imbibition, diffusion, plasmolysis) F. Copy and write the functional activity of the following. (5) 1. Xylem and ---------------- 2 2. 3. 4. 5. G. a. b. c. d. e. H. Chrodae tendinnae and --------------------Stoma and ---------------Gene and ------------Glomerulus and --------------Arrange the following in logical sequence. (5) Mesophyll cells, Xylem, inter cellular space, stoma, substomatal space. Root hair, cortical cells, soil water, xylem, endodermis. Left atria, right ventricle, pulmonary vein, pulmonary artery, lung. kidney, urinary bladder, ureter, renal artery, urethra. Thrombus, thromboplastin, fibrinogen, thrombin, prothrombin. The figure given alongside represents an experiment to demonstrate a physiological activity in plants. Study it and answer the questions that follows. (5) 1. Name the set up. ( 1 ) 2. What will be the observation after a few hours? (1) 3. What is turgor pressure? 4. Suggest a control for this experiment. (1) 5. Define the process demonstrated in this experiment. (1) Section II (40 Marks) Attempt any FOUR questions from this section Question 2 A. Given alongside is a diagram of the lateral section of the human kidney. Study the same and answer the questions that follow. (5) a. Label the parts 1- 6 ( 1 ) b. Name the functional unit present in the above organ. ( ) c. State the location of the organ in our body. (1) d. Why does the part 2 has dotted appearance? (1) e. What is ultrafiltration? (1) B. Give biological / technical terms for the following. (5) i. The apparatus or set up used to measure the rate of transpiration. ii. A unit of chromatin fiber. iii. The secondary capillary found around the kidney tubule. iv. The alternate expansion and elastic recoil of the walls of the artery. v. Shrinkage of protoplasm when a cell is surrounded by hypertonic solution. vi. The contraction phase of ventricles of the heart. vii. The tuft of capillary found in the bowman s capsule. viii. The process of expulsion of urine from the body. ix. A condition in which coronary artery is blocked. x. Complementary base of Adenine. 3 Question 3. A. Study the diagram given alongside and answer the questions that follows. (5) 1. What are represented by figure A and B? (1) 2. Name the parts labeled by 1,2,3 and 5. (1) 3. What is number 4? ( ) 4. What is the protein molecule found in the chromosome called? ( ) 5. What is the importance of the process that takes place in figure B? (1) 6. Name the scientists who worked out the structure shown in figure A. (1) B. Give biological reason for the following. (5) a. Veins are lined with valves. b. Sprinkling common salt on the grass growing lawn will kill the grass on that spot. c. The volume of urine output is much less than glomerular filtrate. Why? d. Rate of transpiration is low when the humidity is high. e. Nutrients absorbed from the gut is distributed to the body via liver. Question 4. A. The following diagram represents the blood circulation in our body. Study it and answers the questions that follows. (10) i. What is represented by the whole diagram? ( ) ii. Name the parts labeled 1 to 10. (2 ) iii. Name the valves shown in 3 and 4. (1) iv. What are represented by A and B? (1) v. Define the term you have mentioned for B. (1) vi. What is the difference in the composition of blood flowing through 8 & 10? (1) vii. Why is it said that basophils are responsible for inflammation? (1) viii. Draw neat and labeled diagrams of the Cross Section (C.S) of 5 and 7. (2) Question 5 A. The following diagram represents a cell that is surrounded by distilled water. Study it and answer the questions that follows. (5) 4 1. Is it a plant or an animal cell? Give reason to support your answer. (1 ) 2. What is the state of the cell? ( ) 3. Explain what will happen if this cell is placed in concentrated sugar solution? (1) 4. Define root pressure. (1) 5. Draw a neat and labeled diagram of the above cell as it would appear after it was placed in concentrated sugar solution. (1) B. Differentiate between the following based on what is given in brackets. (5) a. Nucleotide and a nucleosome (composition) b. Organic and inorganic constituents of urine (name the substances) c. Blood and lymph (composition) d. Plasmolysis and deplasmolysis (definition) e. Transpiration and bleeding in plants. (definition) Question 6. A. The following diagram represents an experiment on a physiological activity in plant. Study it and answer the question that follows. (5) 1. Is it a dicot or a monocot plant? ( ) 2. What is the aim of the experiment? (1) 3. What is the role of glass slide? (1) 4. What change you will observe after a few hours? Why? (1 ) 5. What is guttation? (1) B. The following diagram represents different blood smear. Study it and answer the questions that follows. (5) i. Name the parts 1, 2, 3 and 4. (1) ii. Mention two structural differences between 1 and 2. (1) iii. What is the life span of part labeled 1? ( ) iv. Name a soluble protein found in part 4. ( ) v. What is the function of part 1 and 2? (1) vi. What do you mean by universal donor in blood transfusion? (1) ***************************

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