NEETBotanyRespiration in Plants
When is NADH + H⁺ formed in glycolysis?
Options
- AWhen glucose is converted to glucose 6-phosphate
- BWhen PGAL is converted to 1, 3-bisphosphoglycerate (BPGA)
- CWhen PGA is converted to 3-phosphoglyceric acid (PGA)
- DWhen pyruvate is converted to lactate
Correct answer
B. When PGAL is converted to 1, 3-bisphosphoglycerate (BPGA)
Step-by-step solution
The fructose 1, 6-bisphosphate is split into dihydroxyacetone phosphate and 3-phosphoglyceraldehyde (PGAL). We find that there is one step where NADH + H+ is formed from NAD+ ; this is when 3-phosphoglyceraldehyde (PGAL) is converted to 1, 3-bisphosphoglycerate (BPGA). Two redox-equivalents are removed (in the form of two hydrogen atoms) from PGAL and transferred to a molecule of NAD+ . PGAL is oxidized and with inorganic phosphate to get converted into BPGA. The conversion of BPGA to 3-phosphoglyceric acid (PGA),