PHYSIOLOGY
MUSCLE ENERGETICS TCA CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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6
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2
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12
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8
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Detailed explanation-1: -In the second stage, ATP and NADPH are used to convert the 3-PGA molecules into molecules of a three-carbon sugar, glyceraldehyde-3-phosphate (G3P). This stage gets its name because NADPH donates electrons to, or reduces, a three-carbon intermediate to make G3P.
Detailed explanation-2: -After three cycles, a three-carbon molecule of G3P leaves the cycle to become part of a carbohydrate molecule. The remaining G3P molecules stay in the cycle to be regenerated into RuBP, which is then ready to react with more CO2. Photosynthesis forms an energy cycle with the process of cellular respiration.
Detailed explanation-3: -Remember that carbon fixation must occur six times to produced a glucose molecule. The reduction of 1, 3 biphosphoglycerate will occur 12 times. Two G3P molecules will be used to produce glucose and the remaining molecules will continue through the Calvin Cycle. *BONUS* Take your G3P molecule and turn it back into 3PG.
Detailed explanation-4: -Explanation: Every 3 cycles of the Calvin Cycle (light independent reaction), 6 molecules of G3P are produced; only 1 is used to produce glucose.