In which steps of chemoheterotrophic catabolism do all of the following steps oc
ID: 57621 • Letter: I
Question
In which steps of chemoheterotrophic catabolism do all of the following steps
occur: oxidative decarboxylation, production of NADH, oxidation of substrate by
a dehydrogenase, incorporation of the cosubstrate called coenzyme A. [*Mark all
that apply.]
a. Step 6 of glycolysis during which glyceraldehyde 3-phosphate is
converted to 1,3-BPG.
b. Step 4 of the TCA cycle during which a-ketoglutarate is converted to
succinyl-CoA.
c. The transition step
d. Step 8 of the TCA cycle during which malate is converted to oxaloacetate.
Explanation / Answer
The answer is
b. Step 4 of the TCA cycle in which a-ketoglutarate is converted to succinyl-CoA, where a-ketoglutarate dehydrogenase oxidises the step in which CoA is added to a-ketoglutarate to convert it into succinyl-CoA, and this is place where NADH released participates in oxidative phosphorylation.