Q26 / 180 · NEET 2019 (All India) · Botany

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:

  • A
    Aldolase
  • Correct answer
    B
    Hexokinase
  • C
    Enolase
  • D
    Phosphofructokinase

Solution

Hexokinase.

In the first step of glycolysis, the glucose ring is phosphorylated. Phosphorylation is the process of adding a phosphate group to a molecule derived from ATP. As a result, at this point in glycolysis, 1 molecule of ATP has been consumed. 

For enzyme hexokinase, Mg++ ions are used as activator.

Hence, the correct answer is option: 'B'.

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