Cellular Respiration Quiz
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Questions and Answers

What is the byproduct of cellular respiration that provides energy for organisms?

  • Glucose
  • Carbon dioxide
  • ATP (correct)
  • Lactic acid
  • In which stage of cellular respiration does glycolysis occur?

  • Glycolysis (correct)
  • Mitochondria
  • Krebs cycle
  • Electron Transport Chain
  • What is the purpose of fermentation?

  • To convert glucose into pyruvate
  • To produce more ATP
  • To produce lactic acid
  • To regenerate NAD+ (correct)
  • In which organelle does the Krebs cycle occur?

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

    What is produced in the Electron Transport Chain?

    <p>10 NAD+ and 36 ATP</p> Signup and view all the answers

    What is the equation for cellular respiration?

    <p>C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (ATP)</p> Signup and view all the answers

    What is the primary function of carbohydrates in cells?

    <p>To store energy and provide structural support</p> Signup and view all the answers

    What is the building block of proteins?

    <p>Amino acids</p> Signup and view all the answers

    What is the function of lipids in cells?

    <p>To provide energy and structural support</p> Signup and view all the answers

    What is the primary function of nucleic acids?

    <p>To store and transmit genetic information</p> Signup and view all the answers

    What is the general term for large molecules formed by joining smaller organic molecules together?

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

    What is the term for molecules made from repeating units of identical or nearly identical compounds called monomers?

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

    Study Notes

    Cellular Respiration

    • Cellular respiration is the process by which organisms obtain energy.
    • The equation for cellular respiration is: C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (ATP)

    Stages of Cellular Respiration

    • Cellular respiration occurs in three stages: Glycolysis, Krebs Cycle, and Electron Transport Chain (ETC).

    Glycolysis

    • Occurs in the cytoplasm
    • Anaerobic (does not need oxygen)
    • Glucose is broken down into 2 pyruvate molecules
    • Products: 2 pyruvate molecules, 2 NADH, and 2 ATP

    Krebs Cycle

    • Occurs in the mitochondria
    • Aerobic (needs oxygen)
    • Products: 6 CO2, 8 NADH, 2 ATP, and 2 FADH2

    Electron Transport Chain (ETC)

    • Occurs in the mitochondria
    • Produces the largest number of ATP in cellular respiration
    • Products: 10 NAD+ and 36 ATP

    Fermentation

    • Occurs when oxygen is not available
    • Anaerobic (does not need oxygen)
    • Regenerates NAD+ so that glycolysis can occur again and produce ATP
    • Two types: Lactic acid fermentation and alcohol fermentation

    Lactic Acid Fermentation

    • Pyruvate from glycolysis is converted into lactic acid
    • Occurs in skeletal muscles
    • Causes lactic acid build-up in muscles, leading to pain

    Alcohol Fermentation

    • Occurs in yeast and some bacteria
    • Converts pyruvate into ethanol and CO2
    • CO2 produced during fermentation causes bread to become light and fluffy

    Photosynthesis and Cellular Respiration

    • Photosynthesis and cellular respiration work together to provide the most energy for life processes.

    Macromolecules

    • Macromolecules are large molecules formed by joining smaller organic molecules together.
    • Organic compounds are carbon-based substances that are the basis of living matter.
    • Polymers are molecules made from repeating units of identical or nearly identical compounds called monomers.

    Types of Macromolecules

    • There are four types of macromolecules: carbohydrates, lipids, proteins, and nucleic acids.

    Carbohydrates

    • Carbohydrates are made of carbon, hydrogen, and oxygen.
    • Examples of carbohydrates include sugars and starches.
    • Monosaccharides are simple sugars.
    • Polysaccharides are complex sugars that include starches, cellulose, and glycogen.
    • Carbohydrates can be broken down to provide cells with energy.
    • Some carbohydrates are part of cell structure.
    • Functions of carbohydrates:
      • Store energy
      • Provide structural support

    Lipids

    • Lipids are macromolecules made of fatty acid monomers.
    • Types of lipids include triglycerides, phospholipids, and steroids and waxes.
    • Lipids include fats, oils, and cholesterol.
    • Fats and oils contain fatty acids and glycerol.
    • The cell membrane is made up of a lipid called phospholipid.
    • Functions of lipids:
      • Store energy
      • Provide barriers (as in cell membrane)

    Proteins

    • Proteins are made of amino acids.
    • There are 20 types of amino acids used to build different proteins.
    • Proteins differ in the number and order of the amino acids that make them.
    • Functions of proteins:
      • Transport substances
      • Speed up reactions
      • Provide structural support
      • Make hormones

    Nucleic Acids

    • Nucleic acids are made of monomers called nucleotides.
    • Examples of nucleic acids are DNA and RNA.
    • Function of nucleic acids:
      • Store and transmit genetic information.

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    Description

    Test your knowledge on cellular respiration, the process by which organisms generate energy. Learn about the different stages, including glycolysis and the Krebs cycle.

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