MUSCLE PHYSIOLOGY

Detailed explanation-1: -In carboxylation or fixation, three molecules of CO2 combine with three molecules of 5C compound called ribulose-1, 5-bisphosphate (RuBP), which is the acceptor molecule of CO2, giving rise to an unstable 6-carbon compound.

Detailed explanation-2: -The most common pathway combines one molecule of CO2 with a 5-carbon sugar called ribulose biphosphate (RuBP). The enzyme which catalyzes this reaction (nicknamed RuBisCo) is the most abundant enzyme on earth!

Detailed explanation-3: -Those plants that utilize just the Calvin cycle for carbon fixation are known as C3 plants. Carbon dioxide diffuses into the stroma of chloroplasts and combines with a five-carbon sugar, ribulose1, 5-biphosphate (RuBP).

Detailed explanation-4: -In carbon fixation, a CO2 molecule from the atmosphere combines with a five-carbon acceptor molecule called ribulose-1, 5-bisphosphate (RuBP). The resulting six-carbon compound is then split into two molecules of the three-carbon compound, 3-phosphoglyceric acid (3-PGA).

Detailed explanation-5: -Ribulose 1, 5-bisphosphate carboxylase/oxygenase (Rubisco) is the cornerstone of atmospheric CO2 fixation by the biosphere. It catalyzes the addition of CO2 onto enolized ribulose 1, 5-bisphosphate (RuBP), producing 3-phosphoglycerate which is then converted to sugars.