Triose phosphates produced in the following diagram are:
A
3-PGA and 2-PGA
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B
3-PGAL and 3-PGA
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C
3-PGAL and DiHAP
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D
3-PGA and DiHAP
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Solution
The correct option is C3-PGAL and DiHAP
The fructose-1,6-diphosphate is split into dihydroxyacetone phosphate (DiHAP) and 3-phosphoglyceraldehyde (3-PGAL). We find that there is one step where NADH + H+ is formed from NAD+; this is when 3-phosphoglyceraldehyde (3-PGAL) is converted to 1, 3-bisphosphoglycerate (DPGA). Two redox-equivalents are removed (in the form of two hydrogen atoms) from PGAL and transferred to a molecule of NAD+.