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Biology 183 Exam IIA: Photosynthesis and Calvin Cycle
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Biology 183 Exam IIA: Photosynthesis and Calvin Cycle

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@DarlingLorentz

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Questions and Answers

Which of the following statements is true regarding cyclic photophosphorylation?

  • It doesn't use photosystem II (correct)
  • It produces ATP
  • A and C
  • A and B
  • It produces NADPH
  • What are the end products of the Calvin Cycle?

  • Sugar only (correct)
  • ATP and NADPH
  • NADPH and RuBP
  • ATP and sugar
  • B and C
  • In what order do the following events occur: 1. cellular protein is phosphorylated 2. G protein is activated 3. cAMP is produced 4. Signal molecule binds to membrane receptor 5. GPCR is activated?

  • 42513
  • 45231
  • 45123
  • 34521 (correct)
  • 42531
  • During which phase do sodium channels open and potassium channels close?

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

    What role does water play in photosynthesis?

    <p>Provides electrons for photosystem II</p> Signup and view all the answers

    Which process allows plants to grow in response to light?

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

    What type of signal molecules bind to receptors in the cytoplasm to trigger a cellular response?

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

    Which enzyme uses a H+ gradient to produce ATP during photosynthesis?

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

    What is the process where a membrane becomes less negative relative to the surrounding environment?

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

    Which photopigments in plants act to dissipate the light and offer photoprotection for the plant?

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

    According to the information given, where is ATP synthase located in a chloroplast?

    <p>Thylakoid membrane</p> Signup and view all the answers

    What is the role of a protein kinase?

    <p>Adding a phosphate to a molecule</p> Signup and view all the answers

    What happens when a G-protein is activated?

    <p>It acts as a signaling molecule inside the cell</p> Signup and view all the answers

    What is the effect of hyperpolarization on a cell membrane?

    <p>It makes it harder for an action potential to occur</p> Signup and view all the answers

    How many CO2 molecules are released in the pyruvate oxidation step per glucose?

    <p>4</p> Signup and view all the answers

    Which term would not be used to describe the light reactions of photosynthesis?

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

    How many FADH2 molecules are produced in the citric acid cycle per acetyl CoA?

    <p>1</p> Signup and view all the answers

    What is the purpose of the fermentation process?

    <p>The regeneration of NAD+.</p> Signup and view all the answers

    Where do the non-light requiring reactions of photosynthesis occur?

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

    What is the final electron acceptor in the mitochondrial electron transport chain?

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

    What is photorespiration?

    <p>An inefficient way plants can produce organic molecules and in the process use oxygen and release carbon dioxide</p> Signup and view all the answers

    Which of the following is NOT a product of glycolysis?

    <p>FADH2</p> Signup and view all the answers

    If glucose isn’t available, what other molecules can drive oxidative phosphorylation?

    <p>A and B</p> Signup and view all the answers

    What is the function of chlorophyll b in photosynthesis?

    <p>Secondary pigment acting as antioxidant</p> Signup and view all the answers

    How many carbons are present in a RuBP molecule?

    <p>6</p> Signup and view all the answers

    What is the role of photosystem II in photosynthesis?

    <p>Reaction center that helps split water to gain electrons</p> Signup and view all the answers

    How many NADPHs are needed in the fixation phase only for every 6 CO2 incorporated?

    <p>8</p> Signup and view all the answers

    What is the function of stoma in plants?

    <p>Pore on underside of leaf for allowing CO2 and O2 exchange</p> Signup and view all the answers

    How many CO2 molecules are needed to produce one molecule of sugar (that can be converted to glucose) in the Calvin cycle?

    <p>6</p> Signup and view all the answers

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