Co-ordinated Sciences 0654

1 Which row about characteristics of living things is correct? name of process definition of process A excretion the ability to detect and respond to changes in the environment B nutrition the removal of excess substances and toxic materials C respiration the breaking down of substances to release energy D reproduction the taking in of materials for energy, growth and development

1 What is respiration? A breakdown of food by enzymes in the alimentary canal B breathing to supply oxygen to cells C release of carbon dioxide from the lungs D release of energy for body activities

1 What is respiration? A breakdown of food by enzymes in the alimentary canal B breathing to supply oxygen to cells C release of carbon dioxide from the lungs D release of energy for body activities

1 What is respiration? A breakdown of food by enzymes in the alimentary canal B breathing to supply oxygen to cells C release of carbon dioxide from the lungs D release of energy for body activities

1 All living organisms can break down nutrient molecules to release energy. What is this process? A excretion B growth C nutrition D respiration

1 All living organisms can break down nutrient molecules to release energy. What is this process? A excretion B growth C nutrition D respiration

1 All living organisms can break down nutrient molecules to release energy. What is this process? A excretion B growth C nutrition D respiration

2 The diagram shows an incomplete plant cell. Which structure is not shown? A cell membrane B cell wall C chloroplast D vacuole

2 The photograph shows a bumble bee at a magnification of 6. The line shows the length of the bumble bee. What is the actual length of the bumble bee? A 0.05 mm B 20 mm C 126 mm D 720 mm

© UCLES 2021 0654/12/M/J/21 2 Which diagram correctly shows the diffusion of carbon dioxide and oxygen between an alveolus and a capillary? blood flow blood flow air entering A blood flow blood flow air entering B blood flow blood flow air entering C blood flow blood flow air entering D key carbon dioxide oxygen

© UCLES 2021 0654/13/M/J/21 2 Which diagram correctly shows the diffusion of carbon dioxide and oxygen between an alveolus and a capillary? blood flow blood flow air entering A blood flow blood flow air entering B blood flow blood flow air entering C blood flow blood flow air entering D key carbon dioxide oxygen

2 Which structure is only found in plant cells? A cell membrane B cytoplasm C nucleus D vacuole

2 The diagram shows a plant cell as seen under a light microscope. Which structure is also found in animal cells? A B C D

2 The diagram shows the stages of an experiment. left for 30 minutes beaker dilute sugar solution mass 10.0 g carefully dried mass 10.4 g piece of potato Which statement is a correct explanation for the increase in mass? A Sugar has moved into the cells of the potato by osmosis. B Sugar has moved out of the cells of the potato by osmosis. C Water has moved into the cells of the potato by osmosis. D Water has moved out of the cells of the potato by osmosis.

3 What are the molecules that make up fats and oils? A amino acids and glycerol B fatty acids and glycerol C glucose and amino acids D glucose and fatty acids

© UCLES 2021 0654/11/M/J/21 3 Three food tests are carried out on a sample of food. The results are shown in the table. food test final colour Benedict’s blue biuret blue iodine blue-black From these results, which nutrient is in the food? A reducing sugar B protein C starch D vitamin C

3 Which row matches the nutrient to the chemical elements that it contains? nutrient carbon hydrogen oxygen nitrogen A fat     B protein     C starch     D sugar     key  = contains element  = does not contain element

3 Which row matches the nutrient to the chemical elements that it contains? nutrient carbon hydrogen oxygen nitrogen A fat     B protein     C starch     D sugar     key  = contains element  = does not contain element

3 Which row shows a large molecule and a basic unit from which it is made? large molecule basic unit A glycogen amino acid B glycogen glucose C oil amino acid D oil glucose

© UCLES 2021 0654/12/O/N/21 3 Which molecule contains carbon? A ammonia B fat C sulfuric acid D water