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ICSE Class X Prelims 2021 : Biology (S. Cadambi Vidya Kendra English Sec. School, Bangalore)

5 pages, 37 questions, 0 questions with responses, 0 total responses,

Aishwarya R
S. Cadambi Vidya Kendra English Sec. School, Bangalore
5th to 10th

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EXAMINATION (2020-21) PREPARATORY SUBJECT - BIOLoGY I MARKS- 8 0 C L A S S - X S T A N D A R D SECTION-I (40 MARKS) JAttempt all parts of the questions in this section) Question -1 a) Name i) The ) (5) the following: which initiates cell division in animal cell. structure used to blood pressure. measure I n s t r u m e n t i) The structural iv The pressure vThe unit of kidney. the cell contents on o aggregate of the nerve cell bodies. the full form of the bi Write i) DNA ) LH ii) ATP iv) NADP the cell wall. following: v) ACTH (5) c Rewrite the passage by correctly flling the blanks: (5) Each single DNA strand is composed of repeating. which are made of and a nitrogenous base, Adenine pairs with - - Cytosine pairs with dPick the odd one in the group & state the category to which others (5) belong: i Grana, Fret, Thylakoid, Stoma Urea, Glucose, Amino acids, Na+ Othes are reab Sosbed un ha i) Coughing, Eating, Sneezing, Blinking iv) Addison's disease, Virilism, Cretinism, Cushing's syndrome v Cyton, Photon, Axon, Dendron (5) e Define the following: vRootpressure iTurgidity ii) Hormones i) Synapse iv) Osmoregulation ) Mention if the following ALphTon statements are suitable 4True" or concave "False": lens. 1 Myopia can be corrected by using matter of the brain is perikaryon. 1) The main component of the white ii) Mitosis results in four daughter cells. is about 120 hours. 1v The average life of RBCs in our body in weight of the plant. V) Photosynthesis results in loss dry (5) gi The the statement given statements to correct an Reflex action is a a r e incomplete sert word & in correct, Insert them: automatic quick action stimuluus. iHl Pulse expansion is the alternate & elastic in the body brought recoil of the wall of th. during systole, ii) Osmosis is the movement ol molecules from the region of higher ar concentration to their region ot lower concentration througha semipermeable membrane. Transpiration is the loss of water from the aerial parts the plant v) Photolysis is the splitting of water molecules into hydrogen and hyd ions. h) Study the diagram given below & then answer the questions: i) Name the region in the kidney where it is present. ii) What is the part 2 &3 together called? ii) State the reason for the hydrostatic pressure in part 2. iv Write 2 differences between the composition of the blood 1&4 flowing in part SECTION-II (40 MARKS) (Answer any four questions from Question-2 a) The diagram represents questions that follow: a this section) stage during mitotic cell division. Answer the (5) i) Write two differences between mitosis & b) Give reasons for the following: i) Veins have valves. ii) Deficiency of Vitamin A causes meiosis. night blindness. i i Young plants wilt on a hot sunny day. iv) lt is necessary to maintain a normal osmotic concentration of the blood. v) Goitre is usually observed in people living in hilly regions. Question -3 a) The diagram represents the human brain (7 3 (i) Name the parts 1 to 4 (i) What is the function of parts 2 & 3? (ii) What happens if part 5 is damaged? (iv) Name the nerve fibres that connect the 2 halves of part1 (v) What are the folds and grooves in the cortex of part 1 called? b) Name the following: i) The three hormones produced by pancreaas. ii) The hormone which increases reabsorption in kidneys (3) ii) The hormone which stimulates thyroxine secretion iv The hormone which stimulates sympathetic nervous system. c) Draw a neat labelled diagram of a neuron. (2) Quention4 n) (hiven tiagrami alongside isA hrart. AnsWEr f the exteTnal ures of Ihe queetim he humen i) Name the parts 1 to 8 i) Name the part to which the part 8 supplies blood and what happens if gets an internal clot? ii) Write 2 structural differences between part 4 to 5 iv) Name the valve prcsent between part 2 and 3 and the structure holds in position. v) Draw a neat labelled which diagram Question -s a) The diagram refers to the ear of cross section of artery and of a mammal i) Label the parts 1 to 8 Name the three were a bones of part 4 and state what would happen replaced by big bone? ii) State the functions of parts 2, 3, 7 iv) Name the 2 ) Name vein. and18 fluids present in inner ear. the sensory cells present in part 1& state its function. i th Question -6 a The figure represents an experiment performed to demonstrate a particular aspect of photosynthesis 2 KOH i) What is the aim of the experiment? i) What is the special condition inside the flask? ii) Write the chemical equation to represent photosynthesis. iv) What is the importance of photosynthesis? v In what manner do the leaves 1 and 2 differ at the end of the starch test? b) Differentiate between the following based on what is asked with in brackets: (5) i) Vitreous humor & Aqueous humor (Location) i) Choroid and Retina (Function) ii) Cataract and Astigmatism (Cause) iv) Night blindness & Colour blindness (Symptom) v) Lacrimal gland and Cornea (Function) Question -7 a) Study the diagram and answer the questions that follow: Balsam plant Water Test tube: i) Define the physiological process being studied i) What will be the observation in the 2 tubes after about 2 days? Give reasons iii) Why is the surface of water covered with oil? iv) State the purpose of setting up test tube B. v) State the two factors which would increase the process. vi) Write 2 advantages of this process. vi Write 2 adaptations in plants to reduce this process. vii) Drawa neat labelled diagram of a plasmolyzed cell.

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