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1) The excess of glucose formed in mesophyll cells is converted into a. oxygen b. carbon dioxide c. amino acids d. sucrose
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2) Considering the cardiac cycle, the sound "lub" is produced when the a. atria contracts b. atria relax c. ventricles relax d. ventricles contract
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3) If the blood group of a person is O then the antibodies present in that person's blood is a. anti-O and anti-A antibodies b. anti-O and anti-B antibodies c. anti-B and anti-A antibodies d. anti-B antibodies
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4) The pressure in sieve tubes of phloem is decreased due to the exit of a. nitrogen b. oxygen c. water d. carbon dioxide
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5) The mass of the heart in a normal adult is about a. 250-350 g b. 350-400 g c. 400-450 g d. 200-250 g
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6) The capillaries are joined to form venule and venule are joined to form veins in a. tissue b. muscle cells c. red blood cells d. white blood cells
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7) The strongest and largest chamber of the heart is a. left ventricle b. right ventricle c. upper ventricle d. lower ventricle
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8) The example of sources in plants is a. tubers b. developing fruits c. mature leaf d. roots
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9) The theory which states that transpiration pull is responsible for carrying water upward through the xylem is called a. cortex-xylem theory b. cohesion-pressure theory c. cohesion-tension theory d. pressure-tension theory
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10) The energy which is increased in water molecules due to higher temperatures is a. potential energy b. kinetic energy c. kinematic energy d. thermal energy
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11) The phloem and xylem tissues are also known as a. meristematic tissues b. non-conducting tissues c. conducting tissues d. collective tissues
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12) The blood circulatory system in which blood will never leave the veins, arteries and capillaries is called a. closed blood circulatory system b. osmotic blood circulatory system c. binary blood circulatory system d. integumentary blood circulatory system
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13) The mechanical widening of the obstructed blood vessel or narrowed blood vessel is known as a. angioplasty b. endoscopy c. lithoscopy d. bypass surgery
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14) The valve which prevents the blood backflow to the left atrium from a. left ventricle b. right ventricle c. right atria d. left atria
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15) The land plants that are not composed of xylem and phloem tissue are a. Volvox and ferns b. liverworts and mosses c. ferns and mosses d. mustard and cauliflower plants
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16) The artery that supplies blood to the digestive tract is called a. celiac artery only b. superior mesenteric artery only c. inferior mesenteric artery d. celiac and superior mesenteric artery
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17) The percentage of dissolved substances in plasma is about a. 90-95% b. 1-5% c. 8-10% d. 20-25%
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18) The monocytes are responsible for production of a. macrophages b. RBCs c. platelets d. oxygen
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19) The scientist William Harvey was born in a. 1478 AD b. 1578 AD c. 1378 AD d. 1178 AD
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20) The three arteries that emerge from the surface of the aortic arch supplies the blood to a. kidneys, liver and stomach b. legs, feet and backbone c. shoulders, head and arms d. ribs, arms and hands
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