Glycolysis Preparatory Phase Quiz

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ATP is only used in the payoff phase not the preparation phase.
ATP is consumed in two priming reactions to phosphorylate glucose and fructose-6-phosphate. (correct)
ATP is produced during the conversion of glucose to fructose-6-phosphate.
ATP is required for the isomerization of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate.

<p>To ensure both products from the aldolase reaction can proceed in the subsequent steps of glycolysis. (C)</p> Signup and view all the answers

<p>Phosphofructokinase-1 (A)</p> Signup and view all the answers

The first step in glycolysis where glucose is converted to glucose-6-phosphate using ATP.

The conversion of glucose-6-phosphate to fructose-6-phosphate in glycolysis.

The addition of a phosphate group to fructose-6-phosphate to form fructose-1,6-bisphosphate.

The cleavage of fructose-1,6-bisphosphate into glyceraldehyde-3-phosphate and dihydroxyacetone phosphate.

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The conversion of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate to ensure proper metabolic flow.

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Glucose is the starting molecule
The preparatory phase converts glucose into fructose 1,6-bisphosphate
This process requires 2 ATP molecules
The enzyme hexokinase phosphorylates glucose to glucose 6-phosphate
Phosphohexose isomerase converts glucose 6-phosphate to fructose 6-phosphate
Phosphofructokinase-1 phosphorylates fructose 6-phosphate to fructose 1,6-bisphosphate, consuming another ATP
Aldolase is crucial in cleaving fructose 1,6-bisphosphate into two 3-carbon molecules
The two 3-carbon molecules are dihydroxyacetone phosphate and glyceraldehyde 3-phosphate
Triose phosphate isomerase converts dihydroxyacetone phosphate to glyceraldehyde 3-phosphate completing the preparatory phase