Question

Aldolase breaks down fructose-1,6-bisphosphate into two trioses that are

A) identical.
B) each doubly phosphorylated.
C) identical and each doubly phosphorylated.
D) different and each doubly phosphorylated.
E) different and each singly phosphorylated.

Answer 1

Aldolase breaks down fructose-1,6-bisphosphate into dihydroxyacetone phosphate and glyceraldehyde-3-phosphate, which are different and each singly phosphorylated.

Step-by-step explanation:

The enzyme aldolase is responsible for catalyzing the breakdown of fructose-1,6-bisphosphate into two three-carbon compounds named dihydroxyacetone phosphate (DHAP) and glyceraldehyde-3-phosphate (G-3-P) during glycolysis. Despite both resulting compounds having a single phosphate group, they are not identical; they are isomers of each other.

The triosephosphate isomerase enzyme can convert dihydroxyacetone phosphate into glyceraldehyde-3-phosphate, thereby ensuring that all of the carbon from the original glucose molecule can continue through glycolysis.