Overview of Metabolism

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Questions and Answers

What is the energy currency of life?

  • GTP
  • ADP
  • NAD+
  • ATP (correct)

Which phase of intermediary metabolism involves the energy-requiring biosynthesis of cell components from smaller precursors?

  • Oxidative phosphorylation
  • Glycolysis
  • Anabolism (correct)
  • Catabolism

What are the biological transformations of energy called?

  • Exergonic reactions
  • Endergonic reactions
  • Metabolism (correct)
  • Energy transductions

What are the two types of reactions involved in metabolism that involve the release or requirement of energy?

<p>Endergonic and exergonic reactions (A)</p> Signup and view all the answers

What is the term for the highly ordered macromolecules synthesized from simple precursors using chemical energy in fuels?

<p>Anabolism (B)</p> Signup and view all the answers

What regulates metabolic pathways?

<p>Regulatory enzymes (A)</p> Signup and view all the answers

What is degraded or synthesized in a series of reactions termed metabolic pathways?

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

Which compound is mentioned as an example that can form ATP by oxidation?

<p>Glucose (A)</p> Signup and view all the answers

What are conversions of one form of energy to another called?

<p>Energy transductions (A)</p> Signup and view all the answers

Which type of reaction involves a net release of free energy?

<p>Exergonic reaction (A)</p> Signup and view all the answers

What is the role of ATP in cells?

<p>ATP is the energy currency of cells, linking catabolism and anabolism. (C)</p> Signup and view all the answers

What components make up adenosine triphosphate (ATP)?

<p>Adenine, ribose, and three phosphate groups. (C)</p> Signup and view all the answers

What happens when ATP is hydrolyzed?

<p>Energy is released. (D)</p> Signup and view all the answers

Which process carries energy from catabolism to the energy-requiring processes of cells?

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

What is the primary function of oxidative phosphorylation?

<p>$\text{Production of ATP}$ (D)</p> Signup and view all the answers

What are the products of the oxidation of coenzymes NAD+ and FAD2+?

<p>NADH and FADH2 (C)</p> Signup and view all the answers

What characterizes a redox reaction?

<p>Transfer of electrons from a donor to an acceptor molecule. (B)</p> Signup and view all the answers

What is the primary function of substrate-level phosphorylation?

<p>Production of ATP without the involvement of the electron transport chain. (C)</p> Signup and view all the answers

What is a characteristic feature of oxidative phosphorylation compared to substrate-level phosphorylation?

<p>It is more efficient in producing ATP. (A)</p> Signup and view all the answers

Which compound serves as an alternative source for resynthesizing ATP due to its higher energy release than ATP?

<p>1,3-BPG (1,3-bisphosphoglycerate) (A)</p> Signup and view all the answers

Which process involves the transfer of electrons to allow the formation of ATP?

<p>Electron transport chain (B)</p> Signup and view all the answers

What is the primary function of catabolism in intermediary metabolism?

<p>Energy-yielding degradation of nutrient molecules through oxidative processes. (C)</p> Signup and view all the answers

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