Table of Contents
How are two molecules of 3 PGA 3 Phosphoglycerate created in the Calvin cycle?
In the Calvin-Benson cycle, 3-phosphoglycerate is typically the product of the spontaneous scission of an unstable 6-carbon intermediate formed upon CO2 fixation. Thus, two equivalents of 3-phosphoglycerate are produced for each molecule of CO2 that is fixed.
What are the stages of the Calvin-Benson cycle?
The Calvin–Benson cycle is composed of three phases: (1) carbon fixation, (2) reduction and (3) regeneration of the CO2 acceptor.
What are the stages of the Calvin-Benson cycle select all that apply?
The Calvin cycle is organized into three basic stages: fixation, reduction, and regeneration.
Why does it take three turns of the Calvin cycle to produce G3P the initial product of photosynthesis?
Why does it take three turns of the Calvin cycle to produce G3P, the initial product of photosynthesis? Because G3P has three carbon atoms, and each turn of the cycle takes in one carbon atom in the form of carbon dioxide.
How is G3P made?
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.
How are two PGA Phosphoglycerate formed?
two molecules of phosphoglycerate (PGA), a three-carbon acid. Each reaction is catalyzed by a specific enzyme. Six revolutions of the cycle means that 6 CO2 molecules react with 6 RuBP molecules to produce 12 molecules of PGA; 2 three-carbon PGA molecules combine to form the six-carbon glucose, and 10…
How many G3P are produced in the Calvin cycle?
6 molecules
Explanation: Every 3 cycles of the Calvin Cycle (light independent reaction), 6 molecules of G3P are produced; only 1 is used to produce glucose.
During which stage of the Calvin cycle is PGA produced chegg?
The product of the Calvin cycle is glyceraldehyde-3 phosphate and oxygen is regenerated. In the reduction stage/ second step of Calvin cycle, ATP and NADPH are utilized to convert the of 3- phosphoglyceric acid (3-PGA) molecules into molecules of a three-carbon sugar, glyceraldehyde-3-phosphate (G3P).
What happens to extra G3P in the Calvin cycle?
What happens to the extra G3P made by the Calvin cycle (see Figure 6.22)? It has two fates, depending on the time of day and the needs of different parts of the plant: Some of the extra G3P is exported out of the chloroplast to the cytosol, where it is converted to hexoses (glucose and fructose).
What is G3P in Calvin cycle?
Glyceraldehyde 3-phosphate or G3P is the product of the Calvin cycle. It is a 3-carbon sugar that is the starting point for the synthesis of other carbohydrates. Some of this G3P is used to regenerate the RuBP to continue the cycle, but some is available for molecular synthesis and is used to make fructose diphosphate.