Hazel99
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I know galp is in photosynthesis but didn't know it was in respiration.

Plz explain.
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FutureMedic97
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It comes into respiration during glycolysis. So during glycolysis, glucose is first phosphorylated using 2ATP molecules and then when 2 inorganic phosphate molecules are added, the molecule splits up to form triosephosphate (GALP)
GALP is oxidised to produce 2 pyruvate molecules, 2 reduced NAD and 4 ATP molecules.

You might not have known because GALP in respiration is usually taught as triosephosphate
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Reality Check
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(Original post by FutureMedic97)
It comes into respiration during glycolysis. So during glycolysis, glucose is first phosphorylated using 2ATP molecules and then when 2 inorganic phosphate molecules are added, the molecule splits up to form triosephosphate (GALP)
GALP is oxidised to produce 2 pyruvate molecules, 2 reduced NAD and 4 ATP molecules.

You might not have known because GALP in respiration is usually taught as triosephosphate
Just to note that the hexose does not split into two glyceraldehyde-3-phosphate molecules, but one GALP and a dihydroxyacetone phosphate, DHAP. GALP and DHAP are isomers, and the isomerisation of DHAP into GALP is catalysed by triose phosphate isomerase. It is GALP which goes on to be used up in glycolysis.
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