Cellular Respiration
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Questions and Answers

What is the primary purpose of the electron transport chain in cellular respiration?

  • To generate ATP through the breakdown of glucose (correct)
  • To reduce oxygen to form water
  • To convert light energy into chemical energy
  • To oxidize sugar molecules to release energy
  • What is the net result of the overall chemical change during photosynthesis?

  • H2O is reduced to form sugar and O2
  • CO2 is oxidized to produce sugar and O2
  • CO2 is reduced to produce sugar and O2 is oxidized (correct)
  • Sugar is broken down to produce CO2 and H2O
  • What is the primary function of the Electron Transport Chain in cellular respiration?

  • To break down glucose into pyruvate
  • To convert energy stored in electrons into ATP (correct)
  • To produce CO2 as a byproduct
  • To oxidize glucose to a 2-C compound
  • Which stage of cellular respiration produces the most ATP?

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

    Which process is responsible for capturing light energy and converting it into chemical energy in photosynthesis?

    <p>Chlorophyll molecules</p> Signup and view all the answers

    What is the byproduct of cellular respiration that is essential for the survival of most organisms?

    <p>O2</p> Signup and view all the answers

    What is the end product of glycolysis?

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

    In which part of the cell does cellular respiration take place?

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

    What is the role of substrate-level phosphorylation in cellular respiration?

    <p>To supply the 3rd stage of cellular respiration with electrons</p> Signup and view all the answers

    In which stage of cellular respiration does pyruvate oxidation occur?

    <p>Pyruvate oxidation and the citric acid cycle</p> Signup and view all the answers

    What is the primary source of energy for almost all ecosystems?

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

    What is the net gain of ATP molecules during glycolysis?

    <p>A small amount of ATP</p> Signup and view all the answers

    What is the primary function of the electron transport chain in cellular respiration?

    <p>To generate ATP from NADH and FADH2</p> Signup and view all the answers

    What is the net ATP yield per glucose molecule during fermentation?

    <p>2 ATP</p> Signup and view all the answers

    What is the role of NADH in fermentation?

    <p>To provide an anaerobic path for recycling NAD+ back to NADH</p> Signup and view all the answers

    What is the primary difference between lactic acid fermentation and alcohol fermentation?

    <p>The end product of the fermentation process</p> Signup and view all the answers

    What is the purpose of the hydrogen atoms in fats during cellular respiration?

    <p>To provide energy for ATP production</p> Signup and view all the answers

    What is the role of feedback inhibition in metabolic pathways?

    <p>To prevent the accumulation of product and suppress the process that produces it</p> Signup and view all the answers

    What type of organisms are the primary producers of the biosphere?

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

    What is the by-product of photosynthesis that is essential for other metabolic processes?

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

    What process do autotrophs use to convert solar energy into chemical energy?

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

    What is the name of the process by which organic molecules are oxidized to generate utilizable chemical energy?

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

    What type of organisms depend on photoautotrophs for food and oxygen?

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

    What is the purpose of the electron transport chain in cellular respiration?

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

    What is the origin of oxygen produced during photosynthesis?

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

    Where are chloroplasts concentrated in a leaf?

    <p>In the mesophyll cells</p> Signup and view all the answers

    What is the role of chlorophyll in photosynthesis?

    <p>To convert light energy into chemical energy</p> Signup and view all the answers

    What is the function of stomata in a leaf?

    <p>To absorb CO2 from the atmosphere</p> Signup and view all the answers

    What is the location of the chloroplast's inner and outer membranes?

    <p>In the stroma</p> Signup and view all the answers

    What is the term for the green tissue in the interior of a leaf?

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

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