Question

Enzyme responsible for formation of glucose from glucose 6-phosphate is
A. Dehydrogenase
B. Aldolase
C. Kinase
D. Phosphatase

Answer 1

For the formation of glucose from glucose-6-phosphate, phosphorylation is done and it is done at the 6th carbon and it is catalysed by an enzyme.

Complete answer:
If we start looking the options then the first option is A which is Dehydrogenase and it is an enzyme which mediate the biochemical reactions and it done by removing the hydrogen atom instead of the oxygen as it belongs to the group of oxidoreductases which oxidise the substrate. This is used in the electron transport chain reaction of cell respiration where it catalyzes the removal of hydrogen atoms. This is not the correct option since in the formation of glucose from glucose-6-phosphate it is not used as enzyme there, that is done by phosphorylation.
Moving to option B which is Aldolase and it is an enzyme which catalyzes a reversible reaction and it is mainly responsible for splitting of the aldol, fructose 1,6-bisphosphate into the triose phosphates dihydroxyacetone phosphate (DHAP) and glyceraldehyde 3-phosphate (G3P). Hence it is not the correct option and it gets eliminated.
Moving to option C which is Kinase, it is the correct option since for the formation of glucose from glucose-6-phosphate phosphorylation is done on the sixth carbon and that is done by the enzyme Kinase and therefore this option is the correct one.
Last option is D which is Phosphatase and it is an enzyme which cleave the phosphoric acid monoester into a phosphate ion and an alcohol by using water and it do not catalyse the phosphorylation but in the case of formation of glucose from glucose-6-phosphate, phosphorylation is done and therefore, this option is incorrect.

Thus, the correct answer is option C which is Kinase.

Note: For the formation of glucose from glucose-6-phosphate, phosphorylation is done and it is done at the 6th carbon which is catalysed by Kinase enzyme and due to this from all other option, it is the most suitable and the correct one and all other options are not related to phosphorylation.