Photosynthesis and Cellular Respiration
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Questions and Answers

What is the primary role of electron carriers in the Calvin Cycle?

  • To transport nitrogen
  • To produce oxygen
  • To transport electrons in the form of hydrogen ions (correct)
  • To store glucose
  • The Calvin Cycle requires light to proceed.

    False (B)

    What is the function of the enzyme ribulose bisphosphate carboxylase (rubisco)?

    Carbon fixation

    In the Calvin Cycle, carbon dioxide is ultimately converted into ______.

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

    Match the following components with their respective functions in photosynthesis:

    <p>ATP = Energy source for reactions NADPH = Electron carrier G3P = Precursor for carbohydrates Rubisco = Carbon fixation enzyme</p> Signup and view all the answers

    Which process produces oxygen during photosynthesis?

    <p>Light-dependent reactions (C)</p> Signup and view all the answers

    ATP is broken down into ADP and a phosphate group during the Calvin Cycle.

    <p>True (A)</p> Signup and view all the answers

    What is the overall chemical equation representing cellular respiration?

    <p>C6H12O6 + O2 → H2O + CO2</p> Signup and view all the answers

    Which process occurs in the thylakoid membranes of the chloroplast?

    <p>Light-dependent reactions (B)</p> Signup and view all the answers

    Photosynthesis first evolved in eukaryotic cells.

    <p>False (B)</p> Signup and view all the answers

    What is created when water is split during the light-dependent reactions?

    <p>Hydrogen ions and oxygen</p> Signup and view all the answers

    The final product of photosynthesis is ______.

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

    Match the components of the photosynthesis process with their roles:

    <p>Chlorophyll = Excites electrons when exposed to light ATP Synthase = Produces ATP from ADP Photosystem II = First to receive light energy NADPH = Electron carrier in the light reactions</p> Signup and view all the answers

    What is the main role of the chloroplast in photosynthesis?

    <p>To convert solar energy into chemical energy (B)</p> Signup and view all the answers

    The Calvin Cycle occurs in the thylakoid membranes.

    <p>False (B)</p> Signup and view all the answers

    How do hydrogen ions generate ATP during photosynthesis?

    <p>Through ATP synthase as they flow out of the thylakoid space</p> Signup and view all the answers

    What is the primary function of the G1 phase in the cell cycle?

    <p>Intense growth and activity (A)</p> Signup and view all the answers

    Mitosis consists of five distinct phases.

    <p>False (B)</p> Signup and view all the answers

    What happens to the centrosome during the S phase?

    <p>The centrosome is duplicated.</p> Signup and view all the answers

    The G0 phase is where a cell ________.

    <p>never divides</p> Signup and view all the answers

    Match the phases of mitosis with their descriptions:

    <p>Prophase = Chromosomes condense and the nuclear membrane disintegrates Metaphase = Chromosomes line up in the middle of the cell Anaphase = Sister chromatids are pulled apart Telophase = Chromosomes return to their threadlike shape</p> Signup and view all the answers

    Which phase of interphase involves synthesis of DNA?

    <p>S phase (A)</p> Signup and view all the answers

    Cell division can happen continuously without regulation.

    <p>False (B)</p> Signup and view all the answers

    Name one factor that can cause a cell to exit the cell cycle.

    <p>Presence of appropriate signals or overcrowding.</p> Signup and view all the answers

    What is the primary process that occurs in the cytoplasm during cellular respiration?

    <p>Glycolysis (C)</p> Signup and view all the answers

    The Krebs Cycle produces the majority of ATP in cellular respiration.

    <p>False (B)</p> Signup and view all the answers

    What molecule is produced from pyruvate before it enters the Krebs cycle?

    <p>Acetyl CoA</p> Signup and view all the answers

    The process of breaking down glucose in glycolysis results in the production of _____ molecules of ATP.

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

    Match the following stages of cellular respiration with their primary characteristics:

    <p>Glycolysis = Occurs in the cytoplasm and produces 2 ATP Krebs Cycle = Occurs in the mitochondria and produces electron carriers Electron Transport Chain = Produces the majority of ATP from the energy carried by electrons Pyruvate Oxidation = Converts pyruvate into Acetyl CoA</p> Signup and view all the answers

    Which of the following best describes the role of NADH in cellular respiration?

    <p>It is an electron carrier (B)</p> Signup and view all the answers

    Mitosis results in genetic diversity by producing identical daughter cells.

    <p>False (B)</p> Signup and view all the answers

    Name one function of the cell cycle besides preparing for cell division.

    <p>Growth or tissue repair</p> Signup and view all the answers

    Study Notes

    Photosynthesis

    • Photosynthesis is a chemical process converting water (H₂O) and carbon dioxide (CO₂) into glucose (C₆H₁₂O₆) and oxygen (O₂).
    • Plants and photosynthetic bacteria use this process.
    • Photosynthesis is a two-stage process: light-dependent and light-independent.
    • Light-dependent reactions occur in the thylakoid membranes of the chloroplast.
    • Chlorophyll within the thylakoid membrane absorbs light energy, exciting electrons.
    • Excited electrons travel through an electron transport chain, creating a hydrogen ion gradient.
    • Water molecules are split (photolysis) to replace lost electrons and release oxygen.
    • ATP (energy) is produced.
    • Light-independent reactions (Calvin Cycle) occur in the stroma.
    • ATP and NADPH from the light-dependent reactions provide energy and electrons for the Calvin Cycle.
    • Carbon dioxide is incorporated into organic molecules (glucose).
    • The light-independent reactions do not directly require light.

    Cellular Respiration

    • Cellular respiration is a process that breaks down glucose (C₆H₁₂O₆) and oxygen (O₂) to produce carbon dioxide (CO₂), water (H₂O), and ATP (energy).
    • All organisms undergo cellular respiration.
    • The process is the opposite of photosynthesis.
    • Cellular respiration occurs in three major steps: glycolysis, Krebs cycle, and electron transport chain.
    • Glycolysis occurs in the cytoplasm.
    • The Krebs cycle and the electron transport chain occur in the mitochondria.
    • Glycolysis breaks down glucose into pyruvate.
    • Pyruvate oxidation converts pyruvate to Acetyl CoA.
    • The Krebs cycle then processes Acetyl CoA to generate electron carriers (NADH and FADH₂).
    • Electron transport chain creates a large amount of ATP using energy from the electron carriers.
    • The final products are carbon dioxide, water, and ATP.

    Cell Cycle

    • The cell cycle is a series of steps that lead to cell division.
    • This is crucial for survival, growth, and tissue repair.
    • The phases include:
      • Interphase (G1, S, G2)
      • Mitosis and Cytokinesis
    • G1: Cell growth and activity.
    • S: DNA replicates.
    • G2: Cell continues growing in preparation for division.
    • Mitosis: Nucleus divides
    • Cytokinesis: Cytoplasm divides.
    • Cells can enter a non-dividing G0 phase.
    • Checkpoints regulate the cell cycle.

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    Photosynthesis Notes (PDF)

    Description

    This quiz explores the processes of photosynthesis and cellular respiration, two fundamental biological mechanisms. Covering the chemical reactions, stages, and significance of each process, it highlights the role of plants and photosynthetic bacteria in energy conversion. Test your understanding of these essential life processes and how they interconnect.

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