GCSE AQA Biology (9-1) 4.4.2 Respiration Exam Questions and Answers 100% Correct

GCSE AQA Biology (9-1) 4.4.2 Respiration Exam Questions and Answers 100% Correct Respiration - Answer️️ -A chemical reaction that takes place in the mitochondria of all cells in all living things to provide them with energy Aerobic - Answer️️ -Respiration that requires oxygen, this gives out more energy than anaerobic respiration Anaerobic - Answer️️ -Respiration that does not require oxygen, this gives out LESS energy that aerobic respiration Enzymes - Answer️️ -Control chemical reactions inside cells Mitochondria - Answer️️ -Most of the reactions in aerobic respiration take place inside here Give three uses for this energy in animals (3 marks) - Answer️️ -Any three from - keeping warm - movement - chemical reactions to build larger molecules - active transport Aerobic respiration equation - Answer️️ -C6H12O6 + 6O2 > 6CO2 + 6H2O Explain whether respiration is an exothermic reaction or an endothermic reaction. ( 2 marks) - Answer️️ -It is an exothermic reaction because energy is transferred to the surroundings and energy is transferred from the surroundings in an endothermic reaction. Suggest an explanation for why plants need to respire continuously. ( 2 marks) - Answer️️ -Any 2 from - plants cannot use energy from sunlight directly for metabolic processes - so they need energy from respiration for this purpose - during the day as well as at night Anaerobic respiration can take place in yeast cells. Give another name for this process. ( 1 mark) - Answer️️ -Fermentation Compare anaerobic respiration in a yeast cell with anaerobic respiration in a muscle cell. ( 3 marks) - Answer️️ -Any 2 from - both happen in the absence of oxygen - both use glucose - yeast produces carbon dioxide but muscles do not - yeast produces ethanol but muscles produce lactic acid Aerobic and anaerobic respiration can happen in muscle cells. Compare these two processes. ( 4 marks) - Answer️️ -Any four from - both use glucose/release energy - aerobic respiration produces carbon dioxide/water but anaerobic respiration does not - aerobic respiration releases more energy than anaerobic respiration - aerobic respiration needs oxygen but anaerobic respiration does not Give one advantage and disadvantage of Aerobic respiration. ( 2 marks) - Answer️️ - Advantage - releases more energy than anaerobic respiration Disadvantage - needs oxygen/produces carbon dioxide Give one advantage and disadvantage of Anaerobic respiration. ( 2 marks) - Answer️️ -Advantage - does not need oxygen/does not release carbon dioxide Disadvantage - releases less energy than anaerobic respiration/produces lactic acid Metabolism - Answer️️ -The sum pf all of the reactions that happen in a cell or the body. Name the type of reaction where energy is transferred