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Mock Test Paper 2 ICSE Biology X (One hour and a half) Answers to this paper must be written on the paper provided separately. You will not be allowed to write during the first 15 minute. This time is to be spent in reading the Questions Paper. The time given at the head of this Paper is the time allowed for writing the answers. This Question Paper is divided into two Sections. Section I is compulsory. Attempt 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) Respiratory pigment in RBC (ii) Fluid present in semicircular canals (iii) Lens used to correct Myopia (iv) Structure present in Animal cell to initiate cell division. (v) A nitrogenous base (b) Define the following: (i) Destarching (ii) Universal donor (iii) Osmosis (iv) Pulse (v) Phagocytosis (c) Give exact location and function of each of the following structures. (i) Centromere (ii) Genes (iii) Pinna (iv) Seminiferous tubules (v) Stoma (d) Find the odd one out and give a category to others: (i) Goitre, dwarfism, acromegaly, cataract. (ii) ADH, TSH, NA DP, ACTH. (iii) Sneezing, coughing, typing, blinking (iv) Thylakoids, Frets, Stroma, Follicle. (v) Prostrate gland, salivary gland, seminal vesicle, Cowper s gland. (5) (5) (5) (5) 168 ICSE BIOLOGY X (e) Arrange the group of terms in a logical sequence: (i) Implantation, fertilization, ovulation, gestation (ii) Root hair, Endodermis, pericycle, cortex, xylem (iii) Aorta, hepatic vein, hepatic portal vein, stomach, liver. (iv) Tissue fluid, oxygen, alveolus, blood, tissues (v) Ear ossicles, oval window, tympanum, auditory canal, cochlea. (f) Explain the following terms: (i) Photolysis (ii) Population growth (iii) Antiseptic (iv) Natality (v) Cardiac cycle (g) Match the terms of column I with those of column II and write down matching pairs: Column I Column II (i) Bowman s capsule (a) Nerve impulse (ii) Dendrons (b) Ultrafiltration (iii)Peacemaker (c) Colour of eye (iv) Nephrons (d) Kidney tubules (v) Iris (e) SA Node (f) AV Node (g) Testis (h) Fill in the blanks: (i) The protective covering of heart is _______. (ii) The value present between right auricle and right ventricle is _______. (iii) An artery carrying deoxygenated blood is _______. (iv) Deafness is caused by rupturing of _______. (v) _______ is the area of best vision. SECTION II (5) (5) (5) (5) (40 Marks) (Attempt any four questions) Question 2. (a) The diagram given below shows the internal structure of the spinal cord, depicting a simple reflex. Study the same and then answer the questions that follow: (6) (i) Name the parts numbered 1 to 5. MOCK TEST PAPER 2 169 (ii) Using the letters of the alphabet shown in the figure, indicate the direction in which an impulse enters and leaves the spinal cord. (iii) What is the term given to the point of contact between two nerve cells? (iv) What is meant by simple reflex ? Give two examples of simple reflexes and name the stimuli too. (v) How does the arrangement of nerve cells in the spinal cord differ from that in the brain? (b) Complete the following table by filling in the blank spaces 1 to 8: (4) Name of the Gland Substance produced One important function Islets of Langerhans 3 5 7 1 Adrenalines Thyroxine LH 2 4 6 8 Question 3. (a) Give one difference on the basis of information provided is brackets: (5) (i) Rods & Cones (pigment) (ii) Cerebral & Spinal nerves (number) (iii) Medulla oblongata & Cerebellum (function) (iv) Grana & Stroma (function) (v) Imbibition & Diffusion (definition) (b) Given below is a diagram depicting a defect of the human eye. Study the same and then answer the questions that follow: (5) 1 2 4 (i ) (ii) (iii) (iv) (v ) 3 Name the defect shown in the diagram. Give two possible reasons for this defect of the eye in human beings. Name the parts labelled 1 to 4. Name the type of lens used to correct this eye defect. Draw a labelled diagram to show how the above mentioned defect is rectified using the lens named above. Question 4. (a) (i) Draw a microscopic view of Onion peel and label three basic parts of the cell in it. (5) (ii) How is the above mentioned cell structurally different from cheek cell? (iii) Why is iodine used when preparing an Onion Slide? (b) Given below is a diagrammatic representation of the ventral sectional view of the female reproductive system: (5) 170 ICSE BIOLOGY X (i) Redraw the same on your answer sheet and then fill in and label the following parts: a. Right ovary b. Uterus c. Placenta d. Embryo e. Amnion f. Oviducal funnel. (ii) State the function of the: a. Placenta b. Amniotic fluid (iii) Using the symbol X , indicate the region in the diagram where fertilization occurs. (iv) Differentiate between identical twins and fraternal twins. Question 5. (a) A potted plant was kept in dark for 24 hours. Then in early hours of morning one of the leaves was covered with black paper in the centre only. The potted plant was placed in sunlight for few hours and then the leaf covered with black paper was tested for starch. (i) What aspect of photosynthesis was being investigated? (ii) Is there any control in this experiment? If so, state the same. (iii) Why was the plant kept in dark before the experiment? (iv) Enlist the steps for starch test. (5) (b) Given below is a diagram of a smear of human blood. Study the diagram and answer the following questions: (5) (i) Name the parts 1-4. (ii) What is the special characteristic of part-1? (iii) State two functions of blood. Question 6. (a) Give reasons: (i) People living in hilly regions suffer from goitre. (ii) Pulmonary view carries oxygenated blood. (iii) Females can be carrier for colour blindness but not the males (iv) Centriole is essential for cell division in animal cells (v) Crossing over is important for evolution. (5) MOCK TEST PAPER 2 171 (b) The diagram given alongside is the external view of the human brain. Study the same and answer the questions that follow: (5) 1 2 3 (i) Name the parts labeled 1, 2, and 3. (ii) State the main functions of the parts labeled 1 and 2. (iii) How are the brain cells arranged in the part labeled 1 ? (iv) What is the structural and functional unit of the nervous system? (v) Name the fluid that surrounds the brain. State its function. Question 7. (a) (i) Draw a well labelled diagram of stomatal apparatus. (ii) Write any two limitations of potometer. (b) Write short notes on: (i) Passive immunity (ii) Red cross (iii) Insulin shock (iv) Significance of meiosis (v) Mendel s Law of Segregation. (5)

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