WJEC Biology for A2 Level: Revision Workbook

Q7 [AO1, AO2] The diagram below shows the respiratory pathways for carbohydrates, proteins and fats: a) On the diagram above, mark where ADP is phosphorylated. (2) b) Which yields more energy, 1g of fat or 1g of carbohydrate? Explain your answer. (2) ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... c) Outline how proteins are respired. (2) ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... ......................................................................................................................................................................................................................................................................................................................................... glucose fats (lipid) protein condensation glycerol and fatty acid polysaccharides (starch, glycogen, cellulose, hemicellulose) hydrolysis amino acids hexose phosphate triose phosphate pyruvate CO 2 acetyl CoA CO 2 CO 2 CO 2 5C 4C 6C 3.1 Importance of ATP and 3.3 Respiration | 21 Unit 3 Energy, Homeostasis and the Environment Copyright: Sample material