Multiple choice Which enzyme catalyses isomerisation of 3-PGA to 2-PGA? Phosptriose isomerase Phosphoglyceromutase Hexokinase Diphosphoglyceraldehyde dehydrogenase Reveal answer Fill a bubble to check yourself B Correct answer Explanation 3-PGA is isomerised into 2-PGA in the presence of phosphoglyceromutase enzyme.