AP BIOLOGY

Detailed explanation-1: -RuBisCO stands for Ribulose Bisphosphate Carboxylase Oxygenase. It is formed from Ribulose bisphosphate (RuBP)-a five-carbon ketose sugar. RuBisCO is the most abundant enzyme on earth. It is chatacterised by the fact that its active site can bind both CO2 and O2, hence the name.

Detailed explanation-2: -RuBisCO is present in the mesophyll cells of C3 plants and bundle sheath cells of C4 plants. Ribulose bisphosphate (RuBP) is a 5-carbon compound.

Detailed explanation-3: -Ribulose 1, 5-bisphosphate carboxylase-oxygenase (RuBisCO) is the enzyme responsible for the fixation of carbon derived from atmospheric CO2 as part of the Calvin-Benson cycle that leads to production of the glucose essential for growth in most photosynthetic organisms.

Detailed explanation-4: -Rubisco can bind to either carbon dioxide or oxygen depending on environmental conditions. Binding to carbon dioxide and initiation of the Clavin cycle is favored at low temperatures and at a high carbon dioxide-to-oxygen ratio.

Detailed explanation-5: -In the stroma region of the chloroplast, the enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase (RuBisCO) adds one carbon atom from CO2 to a 5-carbon (5C) acceptor sugar molecule, ribulose-1, 5-bisphosphate (RuBP).