PHYSIOLOGY
MUSCLE ENERGETICS TCA CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Goes away
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Recycled to regenerate RuBP
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Nothing
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None of the above
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Detailed explanation-1: -One is exported while the remaining five G3P molecules remain in the cycle and are used to regenerate RuBP, which enables the system to prepare for more CO2 to be fixed. Three more molecules of ATP are used in these regeneration reactions.
Detailed explanation-2: -One of the three-carbon molecules of G3P leaves the cycle to become a part of a carbohydrate molecule. The remaining G3P molecules stay in the cycle to be formed back into RuBP, which is ready to react with more CO2.
Detailed explanation-3: -One G3P molecule leaves the cycle and will go towards making glucose, while five G3Ps must be recycled to regenerate the RuBP acceptor. Regeneration involves a complex series of reactions and requires ATP.
Detailed explanation-4: -The glyceraldehyde-3-phosphate ( G3P ) that is not used to make organic compounds is turned into ribulose-1, 5-bisphosphate ( RuBP ) to be recycled.
Detailed explanation-5: -The next stage in the Calvin cycle is to regenerate RuBP. Five G3P molecules produce three RuBP molecules, using up three molecules of ATP.