Question

Glucokinase and hexokinase in glycolysis

Answer 1

Answer:

Glucokinase or Hexokinase is a enzyme used at the first step of glycolysis.

Explanation:

• Glucokinase is a Isoenzyme(enzymes which differs in the sequence of amino acids but catalyses the same reaction) of Hexokinase .
• Glucokinase (hexokinase D) is present only in liver and pancreas whereas hexokinase is present in all cells.
• In first step of glycolysis i.e formation of glucose-6-phosphate from glucose is completed with the help of hexokinase. In this step a ATP molecule is consumed i.e ATP is converted to ADP

Result: Glucokinase and hexokinase are used in the first step of glycolysis.