Biology: Autotrophs and Heterotrophs
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Questions and Answers

What is the primary difference between autotrophs and heterotrophs in terms of their carbon source?

  • Autotrophs use nitrogen, while heterotrophs use carbon
  • Autotrophs use CO2, while heterotrophs use preformed organic substances (correct)
  • Autotrophs use methane, while heterotrophs use ammonia
  • Autotrophs use chemical energy, while heterotrophs use light energy

    • What is the end product of the acetyl CoA pathway?

  • Glyceraldehyde 3-phosphate
  • Glucose
  • Methane (CH4)
  • Methyl group (CH3) (correct)

    • Which process involves the conversion of nitrogen gas to ammonia?

  • Ammonification
  • Nitrification
  • Denitrification
  • Nitrogen fixation (correct)

    • What is the byproduct of denitrification?

    <p>Nitrogen gas (N2)</p> Signup and view all the answers

    What type of chemotrophs use inorganic compounds as a source of energy?

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

    Which group of methanotrophs uses the serine pathway?

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

    What is the primary difference between the serine pathway and the ribulose monophosphate pathway?

    <p>Energy efficiency</p> Signup and view all the answers

    What is the end product of the ribulose monophosphate pathway?

    <p>Glyceraldehyde 3-phosphate</p> Signup and view all the answers

    What is the role of methanogens in the anaerobic respiration process?

    <p>They form methane (CH4)</p> Signup and view all the answers

    What is the product of two G-3-Ps in the reversal of the glycolytic pathway?

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

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