MUSCLE PHYSIOLOGY

Detailed explanation-1: -For the synthesis of one molecule of glucose, the Calvin cycle repeats six times. The Calvin cycle is a light-independent reaction in photosynthesis and takes place in three steps, viz., carbon fixation, reduction and regeneration. For the fixation of six molecules of CO2, six turns of the cycle are required.

Detailed explanation-2: -In summary, it takes six turns of the Calvin cycle to fix six carbon atoms from CO2. These six turns require energy input from 12 ATP molecules and 12 NADPH molecules in the reduction step and 6 ATP molecules in the regeneration step.

Detailed explanation-3: -We know that glucose is a 6-carbon compound, so 6 molecules of carbon dioxide are needed to make one molecule of glucose. Hence, six turns of Calvin Cycle are required to generate one mole of glucose.

Detailed explanation-4: -A G3P molecule contains three fixed carbon atoms, so it takes two G3Ps to build a six-carbon glucose molecule. It would take six turns of the cycle, or 6 CO2start text, C, O, end text, start subscript, 2, end subscript, 18 ATP, and 12 NADPH, to produce one molecule of glucose.

Detailed explanation-5: -Because the carbohydrate molecule has six carbon atoms, it takes six turns of the Calvin cycle to make one carbohydrate molecule (one for each carbon dioxide molecule fixed). The remaining G3P molecules regenerate RuBP, which enables the system to prepare for the carbon-fixation step.