Chemistry, 08.07.2019 09:10 hokamidat

The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the calvin cycle would be

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Answer from: edjiejwi

The Calvin cycle, also called the light-independent or carbon fixation reactions, is the second stage of photosynthesis where water, and carbon dioxide (CO2) from air, are converted into organic compounds (i.e. sugars) using the energy from short-lived electronically excited carriers (ATP and NADPH) for the reactions. These organic compounds can then be used by the producing organism (i.e. plants) and the animals that feed on it.

One product of the Calvin cycle is the glyceraldehyde-3-phosphate (G3P), which is later on used in the production of glucose and in the regeneration of Ribulose 1,5-bisphosphate (RuBP), which is an organic compound essential to the reactions in the cycle.

One turn of Calvin Cycle produces 2 G3P molecules, each comprising of 3 carbons. This gives a total of 6 carbons. Five (5) of these carbons will be used to regenerate RuBP and only 1 will be available to form a surplus G3P later on. This surplus G3P will be used for the production of glucose (a 6-carbon sugar).

Thus, 3 turns of the carbon cycle will produce 1 surplus G3P. There are 8 sets of 3-turns in 24 cycles, therefore,

1 net G3P molecule * 8 sets of 3-turns = 8 G3P molecules

Therefore, there are 8 net or surplus G3P molecules produced for 24 cycles of the Calvin Cycle. The total G3P molecules produced, including the ones that participated in the regeneration of RuBP would be 48 G3Ps.

For every 3 turns, 6 G3P molecules are produced, 5 of which will be used in the regeneration of RuBP and 1 will be the net or surplus, to be used for the production of glucose. The 48 G3Ps then come from the calculation,

6 total G3P molecules * 8 sets of 3-turns = 48 G3P molecules

The figure below shows the products of the cycle after 3 turns (Source: https://ka-perseus-images.s3.amazonaws.com/2f4bdc8f8275834d3f5ef434d93bf16b991b2357.png).

The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the calvi

The number of glyceraldehyde-3-phosphate molecules that would be produced from 24 turns of the calvi

Answer from: Quest

B. a graduated substance

Answer from: Quest

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

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