Lesson 15: Electrons and Energy in Living Systems
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Questions and Answers

What is the process of changing energy from one form to another known as?

  • Bioenergetics
  • Cellular respiration
  • Photosynthesis
  • Energy conversion (correct)

Which molecule is derived from vitamin B3 and is involved in energy transfer in cells?

  • NADH (correct)
  • Niacinamide
  • NADPH
  • FAD

What do autotrophs do that heterotrophs cannot?

  • Digest plant and animal matter
  • Use cellular respiration
  • Produce their own food (correct)
  • Obtain energy from the Sun

Which molecule is involved in carrying high-energy electrons during the process of cellular respiration?

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

What is the primary source of energy for most life forms on Earth?

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

What outlines who eats whom in an ecosystem?

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

What is the oxidized form of the electron carrier NAD?

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

Which compound is derived from vitamin B2 and serves as an electron carrier molecule?

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

What is the reduced form of the molecule FAD?

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

Which compound plays an important role in anabolic reactions and photosynthesis?

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

In which process is ATP used for energy, resulting in the production of ADP or AMP?

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

Which compound allows the cell to store energy briefly and transport it within the cell to support chemical reactions?

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

What is the principal function of electron carriers in living systems?

<p>Carrying high energy electrons between compounds (B)</p> Signup and view all the answers

Which compound contains an extra phosphate group and plays a role in photosynthesis?

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

Which reaction releases energy?

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

What happens to ATP when it is used for energy in a reaction?

<p>It is converted to ADP or AMP, releasing energy. (C)</p> Signup and view all the answers

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