Metabolism, anabolism and catabolismIB MYP Biology: Mind map

Exam questions on Metabolism, anabolism and catabolism

1. After a meal of rice and lentils in Mumbai, a student's body digests the food. Later her cells use some of the glucose to release energy, and use amino acids from the lentils to build new proteins for growth and repair.
   State whether digestion of the lentils and building new proteins are catabolic or anabolic, giving a reason for each.2 marks
2. A mango tree in Kerala, India, stands in bright sunshine. Its leaves make glucose, and all the living cells in the tree, including those in its roots, release energy from that glucose.
   Explain why photosynthesis is described as an anabolic reaction.2 marks
3. A student investigates how temperature affects the metabolism of woodlice, which are cold-blooded animals. She seals 10 woodlice in a respirometer tube containing soda lime, which absorbs carbon dioxide, and places it in a water bath. As the woodlice use oxygen, a drop of coloured liquid in a capillary tube moves towards them, and she measures how far it moves in 10 minutes. She repeats this at 10 °C, 20 °C and 30 °C, and the liquid moves 4 mm, 9 mm and 19 mm.
   State a hypothesis for this investigation with a scientific reason, and name the independent and dependent variables.3 marks