Substrate-Level Phosphorylation Quiz

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Questions and Answers

Which enzyme catalyzes the substrate-level phosphorylation of ADP to form ATP and 3-phosphoglycerate?

  • Hexokinase
  • Phosphoglycerate kinase (correct)
  • Pyruvate kinase
  • Enolase

What is the high energy enol phosphate formed during the dehydration of 2-phosphoglycerate by enolase?

  • ADP
  • ATP
  • PEP (correct)
  • NADH

What is the energy source for the production of a high energy phosphate during substrate-level phosphorylation of ADP by 1,3-bisphosphoglycerate?

  • NADH
  • FADH2
  • ATP
  • A substrate (correct)

Which reaction in glycolysis is catalyzed by enolase?

<p>Formation of PEP from 2-phosphoglycerate (B)</p> Signup and view all the answers

Which reaction in glycolysis is the third irreversible reaction?

<p>Formation of pyruvate from PEP (A)</p> Signup and view all the answers

Which enzyme catalyzes the conversion of PEP to pyruvate in glycolysis?

<p>Pyruvate kinase (C)</p> Signup and view all the answers

Which reaction in glycolysis results in the formation of the second ATP by substrate-level phosphorylation?

<p>Formation of pyruvate from PEP (C)</p> Signup and view all the answers

Is the conversion of 2-phosphoglycerate to PEP a spontaneous reaction?

<p>No (D)</p> Signup and view all the answers

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