Trace Rubisco-catalysed CO₂ fixation to RuBP and glycerate 3-phosphate, and interpret radioactive-carbon evidence from Calvin's experiments in IB Biology HL C1.3.15.
Boreal forests stretch across Canada, Russia and Scandinavia. This northern ecosystem accounts for 29 % of the world's forest areas. The long, cold winters favour tall evergreen trees with either needles or scale-like leaves. These trees are wind-pollinated and their seeds are not enclosed in a fruit. The photograph shows a typical boreal forest in winter.
In some boreal species, Rubisco is down-regulated during the winter months. Describe the role of Rubisco in photosynthesis.