Energy and Life: Photosynthesis & Respiration
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Questions and Answers

What do the products of photosynthesis become?

  • Energy sources for herbivores
  • The reactants for photosynthesis
  • Wastes for the cell
  • The reactants for cellular respiration (correct)
  • Why can't cells use sugar directly for energy?

  • Sugar cannot be broken down in the presence of oxygen
  • Energy from sugar is in an unusable form (correct)
  • Sugar carries too much energy for cellular functions
  • Cells require sugar to first transform into glucose
  • What analogy is used to explain the necessity of cellular respiration?

  • A plant needing sunlight for growth
  • Exchanging yen for dollars to shop (correct)
  • A phone needing a charger to function
  • A car needing gasoline to run
  • Which of the following best describes cellular respiration?

    <p>The conversion of sugar into more usable energy</p> Signup and view all the answers

    What energy form do muscle cells use to perform contractions?

    <p>ATP</p> Signup and view all the answers

    What is the primary source of energy for all living organisms on Earth?

    <p>Sunlight</p> Signup and view all the answers

    Which statement about cellular respiration and photosynthesis is true?

    <p>They are dependent on each other</p> Signup and view all the answers

    What process do plants use to convert sunlight into chemical energy?

    <p>Photosynthesis</p> Signup and view all the answers

    What must occur for cells to utilize the energy stored in sugar?

    <p>Sugar must be converted to ATP</p> Signup and view all the answers

    What happens during cellular respiration in organisms?

    <p>Sugar is broken down to release energy</p> Signup and view all the answers

    What type of reaction is photosynthesis classified as?

    <p>Endergonic</p> Signup and view all the answers

    Which of the following substances are the products of cellular respiration?

    <p>Carbon dioxide and water</p> Signup and view all the answers

    What is the main purpose of ATP in cells?

    <p>To provide energy for cellular work</p> Signup and view all the answers

    What is required for the process of photosynthesis to occur?

    <p>Water and carbon dioxide</p> Signup and view all the answers

    Which term describes the breakdown of sugar to release energy in living organisms?

    <p>Cellular respiration</p> Signup and view all the answers

    Study Notes

    Energy and Life

    • All living things require energy for survival and reproduction.
    • Energy is the ability to do work.
    • Energy ultimately comes from the sun.
    • Plants use the sun's energy to make sugar through photosynthesis.
    • Organisms use sugar as a source of energy.

    Photosynthesis

    • Plants use energy from sunlight to make sugar and oxygen from carbon dioxide and water.
    • This is an endergonic reaction requiring energy to combine carbon dioxide and water into sugar.
    • The sun provides the energy needed to drive this process.

    Cellular Respiration

    • Organisms break down sugar to release stored energy, which is used to make ATP (adenosine triphosphate).
    • This is an exergonic reaction where energy is released as sugar is broken down into carbon dioxide and water.
    • Cellular respiration is the reverse of photosynthesis, with the products of one being the reactants of the other.
    • Cellular respiration is necessary because cells can't directly use sugar as a source of energy.
    • ATP is a more usable form of energy for cells to perform work, such as muscle contraction.

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    Description

    Explore the crucial processes of photosynthesis and cellular respiration in this quiz. Understand how living organisms acquire energy from the sun and utilize sugar for survival. Test your knowledge on the interplay between these two essential biochemical reactions!

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