In the initial steps of glycolysis, a glucose molecule is phosphorylated to prevent it from leaving the cell. Which enzyme catalyzes this first ATP-consuming step?
Q1. In the initial steps of glycolysis, a glucose molecule is phosphorylated to prevent it from leaving the cell. Which enzyme catalyzes this first ATP-consuming step?
Answer: Hexokinase
Explanation: Hexokinase phosphorylates glucose to glucose-6-phosphate; Phosphofructokinase is the rate-limiting enzyme that acts later in the energy investment phase.