INTRODUCTION TO MICROSCOPY CELL BIOLOGY
MITOCHONDRIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The first step in glycolysis is catalyzed by an enzyme called ____
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isomerase
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hexokinase
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aldolase
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phosphofructokinase
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Explanation:
Detailed explanation-1: -The first step in the preparatory stage of glycolysis is phosphorylation. During this step, glucose is phosphorylated to glucose-6-phosphate by the enzyme hexokinases with the consumption of an ATP molecule.
Detailed explanation-2: -Step 1: Glucose is phosphorylated by the enzyme hexokinase to form glucose 6-phosphate. Glucose gains energy by being phosphorylated at the expense of one ATP. Step 2: Glucose 6-phosphate is converted into its isomer, fructose 6-phosphate, by an isomerase enzyme.
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