Multiple choice

Which of the following is the first step of glycolysis?

  1. Breakdown of glucose

  2. Phosphorylation of glucose

  3. Conversion of glucose into fructose

  4. Dehydrogenation of glucose

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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

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