General Biology 1 Cellular Respiration Quiz
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Questions and Answers

What is the main function of cellular respiration?

  • To break down sugars and food molecules in the presence of oxygen (correct)
  • To release waste CO2 from the cell
  • To capture energy from sunlight
  • To rearrange atoms of carbon dioxide and water to produce glucose and oxygen

    • Where does the energy for almost all ecosystems come from?

  • Carbon dioxide
  • Mitochondria
  • The Sun (correct)
  • Chloroplasts

    • What is the primary role of mitochondria in cellular respiration?

  • Breaking down glucose to carbon dioxide and water (correct)
  • Generating glucose and oxygen
  • Harvesting energy from food molecules to generate ATP
  • Capturing energy from sunlight

    • What is the fundamental function of cellular respiration?

    <p>Generating ATP for cellular work</p> Signup and view all the answers

    What is meant by respiration in the breathing sense?

    <p>Exchange of gases between the cell and its environment</p> Signup and view all the answers

    Where is most of the cellular respiration processes occur within the cell?

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

    What is the main purpose of glycolysis?

    <p>To break down glucose into two molecules of pyruvate</p> Signup and view all the answers

    Where does the Citric Acid Cycle take place?

    <p>In the inner mitochondrial membrane</p> Signup and view all the answers

    What is the role of NAD+ in cellular respiration?

    <p>To accept electrons and become reduced to NADH</p> Signup and view all the answers

    What is the purpose of oxidative phosphorylation in cellular respiration?

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

    What are the products of the Citric Acid Cycle?

    <p>$CO2$ and NADH</p> Signup and view all the answers

    Where does glycolysis take place?

    <p>$In the cytoplasm$</p> Signup and view all the answers

    How do cells extract energy from glucose?

    <p>$By breaking down glucose into pyruvate$</p> Signup and view all the answers

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

    <p>$To produce ATP through oxidative phosporylation$</p> Signup and view all the answers

    What is the purpose of chemiosmosis in oxidative phosphorylation?

    <p>$To utilize the energy of a proton (H+) gradient to generate ATP$</p> Signup and view all the answers

    What is the final electron acceptor in cellular respiration?

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

    Where does most of the cellular respiration processes occur within the cell?

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

    What is the primary role of mitochondria in cellular respiration?

    <p>Harvesting energy in ATP molecules</p> Signup and view all the answers

    What is the purpose of chemiosmosis in cellular respiration?

    <p>Harvesting energy in ATP molecules</p> Signup and view all the answers

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

    <p>Harvesting energy in ATP molecules</p> Signup and view all the answers

    What is the purpose of oxidative phosphorylation in cellular respiration?

    <p>Harvesting energy in ATP molecules</p> Signup and view all the answers

    What are the products of the Citric Acid Cycle?

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

    What is the primary role of the inner mitochondrial membrane in cellular respiration?

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

    Which enzyme is important in oxidizing glucose during cellular respiration and becomes reduced to NADH?

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

    What is the main purpose of the Citric Acid Cycle in cellular respiration?

    <p>To oxidize pyruvate to a two-carbon compound</p> Signup and view all the answers

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

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

    Where does glycolysis take place within the cell?

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

    What is the role of FADH2 in cellular respiration?

    <p>To transport electrons to the electron transport chain</p> Signup and view all the answers

    8

    <p>The movement of electrons from one molecule to another during chemiosmosis</p> Signup and view all the answers

    What is the function of NAD+ in cellular respiration?

    <p>To accept electrons and become reduced to NADH</p> Signup and view all the answers

    What is the primary role of ATP synthase in cellular respiration?

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

    Study Notes

    Cellular Respiration Overview

    • Main function of cellular respiration is to convert biochemical energy from nutrients into adenosine triphosphate (ATP).
    • Energy for almost all ecosystems originates from sunlight, captured during photosynthesis, and then transferred through food chains.

    Mitochondrial Function

    • Primary role of mitochondria in cellular respiration is to serve as the site for ATP production through metabolic processes.

    Respiratory Concepts

    • Fundamental function of cellular respiration is to provide energy for cellular activities by breaking down glucose and other substrates.
    • In the breathing sense, respiration refers to the physical process of inhaling oxygen and exhaling carbon dioxide.

    Cellular Locations

    • Most cellular respiration processes occur in the mitochondria, specifically within the matrix and inner mitochondrial membrane.
    • Glycolysis takes place in the cytoplasm, breaking down glucose into pyruvate, which is then used in aerobic or anaerobic pathways.

    Glycolysis and the Citric Acid Cycle

    • The main purpose of glycolysis is to produce energy in the form of ATP and NADH while breaking down glucose.
    • Citric Acid Cycle (Krebs cycle) occurs in the mitochondrial matrix and further processes acetyl CoA to produce energy carriers.

    Key Molecules in Cellular Respiration

    • NAD+ plays a crucial role as an electron carrier in cellular respiration, being reduced to NADH during the oxidation of glucose.
    • FADH2 serves a similar function as NADH, transporting electrons to the electron transport chain.

    Oxidative Phosphorylation

    • The purpose of oxidative phosphorylation is to generate ATP through the energy released by electrons passing through the electron transport chain.
    • Chemiosmosis involves the movement of protons across the inner mitochondrial membrane, driving ATP synthesis via ATP synthase.

    Electron Transport Chain

    • The electron transport chain functions to transfer electrons through a series of proteins, ultimately facilitating the creation of a proton gradient.
    • The final electron acceptor in cellular respiration is molecular oxygen, which combines with electrons and protons to form water.

    Citric Acid Cycle Products

    • Main products of the Citric Acid Cycle include ATP, NADH, FADH2, and carbon dioxide.

    Function of ATP Synthase

    • The primary role of ATP synthase in cellular respiration is to synthesize ATP from ADP and inorganic phosphate during chemiosmosis.

    Role of Enzymes

    • Important enzyme, often associated with glycolysis, oxidizes glucose and becomes reduced to NADH, facilitating energy extraction.

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    Description

    Test your knowledge of cellular respiration and photosynthesis in biology. Explore the processes of breaking down food molecules to generate ATP, and the capture of sunlight energy to produce glucose and oxygen.

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