Igcse Biology Practice Paper
Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended)
READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, Centre number and candidate number on the answer sheet in the spaces provided unless this has been done for you. There are forty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil …show more content…
14 Why is sunlight necessary for photosynthesis? A B C D It is a catalyst. It is a source of energy. It provides nutrients. It provides oxygen.
7 15 The table shows the percentage of protein, fat and carbohydrate in four samples of dried food. Which sample has the highest energy content? protein % A B C D 76 17 33 15 fat % 9 0 32 85 carbohydrate % 15 83 35 0
16 The table shows some of the nutrients in four meals. Which meal will be the most likely to stimulate peristalsis in the alimentary canal? g / 100 g carbohydrate A B C D 18 30 40 38 fat 12 32 15 4 fibre (roughage) 8 2 10 22 protein 25 12 5 10
8 17 The diagram shows the circulatory system of a mammal.
capillary network in lungs R right atrium left atrium
S capillary network in body organs
What describes the blood in vessels R and S? R A B C D deoxygenated deoxygenated oxygenated oxygenated S deoxygenated oxygenated deoxygenated oxygenated
18 From which organ is most carbon dioxide excreted? A B C D kidney liver lung skin
19 Which word equation represents anaerobic respiration in muscles? A B C D glucose → lactic acid + energy glucose → ethanol + carbon dioxide + energy glucose + oxygen → carbon dioxide + water + energy glucose + oxygen → lactic acid + water + energy