Cellular Respiration Quiz

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Questions and Answers

Where does glycolysis take place?

  • Endoplasmic reticulum
  • Mitochondrial matrix
  • Cytoplasm (correct)
  • Nucleus

What is the key metabolic intermediate linking glycolysis and the citric acid cycle?

  • Pyruvate
  • Oxaloacetate
  • Acetyl-CoA (correct)
  • NADH

How many molecules of pyruvate are formed per molecule of glucose in glycolysis?

  • 4
  • 2 (correct)
  • 3
  • 1

Which enzyme is responsible for the conversion of pyruvate to acetyl-CoA?

<p>Pyruvate dehydrogenase (D)</p> Signup and view all the answers

Which enzyme is responsible for oxidizing isocitrate to generate alpha-ketoglutarate?

<p>Isocitrate dehydrogenase (C)</p> Signup and view all the answers

Which molecule is formed when alpha-ketoglutarate is decarboxylated and oxidized?

<p>Succinyl-CoA (A)</p> Signup and view all the answers

Which enzyme is responsible for converting succinyl-CoA into succinate?

<p>Succinyl-CoA synthetase (A)</p> Signup and view all the answers

Which enzyme is embedded in the inner mitochondrial membrane and is a component of the electron transport chain?

<p>Succinate dehydrogenase (C)</p> Signup and view all the answers

Which molecule does succinate dehydrogenase use to accept electrons?

<p>FAD (D)</p> Signup and view all the answers

Which enzyme is responsible for converting fumarate to malate?

<p>Fumarase (D)</p> Signup and view all the answers

Which molecule is oxidized to re-form oxaloacetate and reduce a molecule of NAD+ to NADH?

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

What is the final product that combines with another acetyl-CoA in the next cycle of the citric acid cycle?

<p>Oxaloacetate (D)</p> Signup and view all the answers

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