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1 c Grade 10 Angel International School - Manipay 1 st Term Examination November 2016 Biology Duration: 3Hours Index No:- Choose the correct answer and underline it. (1) When a red stain is added to a culture containing both living and dead cells, only the dead cells take up the stain. Which structure prevents the stain entering the living cells? a. Cell membrane b. Cell wall c. Cytoplasm d. Vacuole (2) The table shows some characteristics of four types of cell which cell could be a root hair cell? nucleus chlorophast A B C D (3) Which structure are found in animal cells and in plant cells? a. Cell membrane and chloroplasts b. Cell membrane and nucleus (4) Which of the following have both cytoplasm and cell walls? a. Muscle cells b. Red blood cells (5) The table applies to four cells. Which one is a xylem vessel? Cell wall Nucleus A Absent Absent B Absent Present C Present Absent D Present Present (6) Where is the alimentary canal is most water absorbed? a. Colon b. Ileum c. Cell wall and chloroplasts d. Cell wall and nucleus c. Root hair cells d. Xylem vessels c. Esophagus Oesophagus d. Stomach (7) Which statement is true of a sexual reproduction in plants? a. Insects are needed to transfer pollen b. New plants grow from seeds c. Off spring are genetically identical to their parents d. Two types of gametes are involved (8) What are required by a baby and are present in breast milk but not in bottle milk? a. Anti bodies b. Carbohydrates c. Minerals d. Vitamins (9) When a person breathes in what happens to the diaphragm and to the rib cage. Diaphragm Rib cage A Becomes flattered Downwards and inwards B Becomes flattered Outwards and upwards C Becomes more curved Downwards and inwards D Becomes more curved Outwards and upwards 1
2 (10) Milk produces a red precipitate when heated with Benedict s solution. A purple colour develops when the biuret test is used on milk using these results only which nutrients does milk contain a. Fat and Protein b. Fat and Starch c. Reducing sugar and Protein d. Reducing sugar and starch. (11) Which description applies to a red blood cell? Cell wall Nucleus A Absent Absent B Absent Present C Present Absent D Present Present (12) How do nitrate ions, oxygen and water enter root hair cells? By active transport By diffusion By osmosis A Nitrate ions Oxygen Water B Nitrate Water Oxygen C Oxygen Nitrate ions Water D Oxygen water nitrate ions (13) Which processes can take place in a root hair cell when oxygen is not available? a. Active transport only b. Diffusion only c. Active transport and osmosis only d. Diffusion and osmosis only (14) Which liquid has the highest water potential at atmospheric pressure? a. Distilled water c. Root hair cell sap b. Leaf cytoplasm d. Soil water (15) The diagram shows apparatus used to investigate osmosis Which molecules will move across the partially permeable membrance and which changes in levels will occur. Molecules Level 1 Level 2 A Sugar Fall Rise B Water Fall Rise C Sugar Rise Fall D Water Rise Fall (16) The concentration of nitrate ions in a root cell is higher than in the surrounding soil solution. How do the nitrate ions move into the root cell? a. Active transport b. Diffusion c. Osmosis d. Transpiration (17) Which process may require energy from respiration? a. Movement of carbon dioxide into the alveoli b. Movement of oxygen into red blood cells c. Uptake of glucose by cells in the villi d. Uptake of water by root hair cells (18) A human red blood cell is placed in a strong salt solutions. In which directions does water move and what is the effect on the cell? Movement of water Effect on cell A Into the cell Slight increase in size B Into cell Cell bursts C Out of the cell Slight decrease in size D Out of the cell Cell membrane damaged. 2
3 (19) Protease breaks down proteins into amino acids. In the lock and key hypothesis what is the lock and what is the key? Lock Key A Amino acid Protease B Protease Amino acid C Protease Protein D Protein protease (20) Which statement about enzymes is correct? a. They are all proteins b. They are changed by the chemical reactions they control c. They are destroyed by temperatures below 10 0 c d. They are found only in the alimentary canal (21) Which secretion does not contain digestive enzymes? a. Bile b. Gastric juice c. Intestinal juice d. Pancreatic juice (22) When is carbon dioxide absorbed and when is it released by an ecosystem such as a tropical forest? Day light Darkness A Absorbs Absorbs B Absorbs Releases C Releases Absorbs D Releases releases (23) Where and how does carbondioxide enter a plant? Where How A Root hair cells Active uptake B Root hair cells diffusion C Stomata Active uptake D Stomata diffusion (24) What is the function of chlorophyll? a. To convert light energy to chemical energy b. To release energy from harbohydrates c. To store magnesium ions d. To store raw materials for photosynthesis (25) Which substance must be present in the soil for the growth of a healthy green plant a. Amino acid b. Carbondioxide (26) Which identifies the function of each type of plant cell? Palisade cells Phloem cells Root hair cells A Photosynthesis Sugar transport Ion uptake B Photosynthesis Sugar transport Transpiration C Transpiration Photosynthesis Ion uptake D Transpiration Photosynthesis Sugar transport c. Glucose d. Magnesium ions (27) A young plant may wilt when dug up and replanted in another place. What causes this? a. The leaves lose less water b. The roots cannot take up mineral salts 3 c. The stem cannot transport water d. The surface area of the root is reduced. (28) For which food test must the sample be dissolved in ethanol. a. Fat b. Protein c. Reducing sugar d. Starch
4 (29) Which substances are needed in the diet to prevent rickets? a. Calcium and vitamin C b. Calcium and vitamin D c. Iron and vitamin C d. Iron and vitamin D (30) A lack of which nutrient causes gums to bleed? a. Calcium b. Iron c. Vitamin C d. Vitamin D (31) Which component of the diet prevents constipation? a. Fibre b. Minerals c. Protein d. Vitamins (32) Which substances are needed for healthy bones and teeth? a. Calcium and vitamin C b. Calcium and vitamin D c. Iron and vitamin C d. Iron and Vitamin D (33) In which order do these events occurs in human nutrition? a. Digestion Ingestion absorption assimilation b. Digestion Ingestion assimilation absorption c. Ingestion Digestion absorption assimilation d. Ingestion digestion assimilation absorption (34) The diagram shows the alimentary canal. Where is the enzyme responsible for the first stage of protein digestion produced? a) A b) B c) C d) D (35) 35. The diagram shows part of the human gas exchange system. What are W, X, Y and Z Bronchus Bronchioles Larynx Trachea A W X Z Y B X Z Y W C Y W X Z D Z Y W X (36) Which equation represents an aerobic respiration in yeast? a. Glucose alcohol + carbon dioxide b. Glucose alcohol + water c. Glucose lactic acid + carbon dioxide d. Glucose lactic acid + water (37) A finger that touches a hot object is quickly taken away from the source of heat. What is the role of relay neuroones in this response? a. to carry nerve impulses within the spinal coral b. To generate impulses in the receptors of the finger c. To link the sense organse to the sensory neurones. d. To pass nerve impulse out to the neurones. (38) In which part of the female reproductiove system does fertillsation occur? a. Ovary b. Oviduct c. Uterus d. Vagine 4
5 (39) Which method of contraception is the most effective in preventing the spread of diseases such as syphills and HIV/AIDS? a. Cervical caps / diaphragms c. Oral contracepptive pills b. Male condoms d. spermicides (40) Which chambers of the human heart contain oxygenated blood? a. Left atrium and left ventricle b. Left atrium and right ventricle Answer all questions PART - II c. right atrium and left ventricle d. D. Right atrium and right ventricle I. II. III. IV. V. VI. 1. where are red blood cells made? 2. List four components of plasma? 3. Haemoglobin is purplish red why is oxyhaemoglobin a bright red. 4. Name two functions of blood other than transport. 5. Which blood vessels carry blood (a) away from and (b) towards the heart? 1. Which surface of a leaf loses most water? 2. Write an experiments to prove the above activity? 3. Which blood vessel transports digested food to the liver? 4. Where in a leaf do you find xylem and phloem tissue? 5. What is meant by a double circulatory system? 1. List three ways in which neurons are similar to other cells. 2. What is the value of reflex actions? 3. What is the function of central nervous system? 4. Define the term reflex arc 5. Which part of the eye contains cells which are sensitive to light? Which type of cell division is involved in the production of a new 1. Organism by asexual reproduction? 2. The production of gametes. 3. Give two characteristics of insect pollinated flowers. 4. Where are sperms made? 1. What is the name for the narrow opening between the uterus and the vagina? 2. Mention five conditions that affect transpiration rate? 3. Why do veins have a large lumen? 4. Where is the pacemaker and what does it do? 5. What are the conditions necessary for germination? 1. Define respiration? 2. State how aerobic and anaerobic respiration differ? Describe a commercial use of anaerobic respiration? ***** 5
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