Plant Biochemistry: Photosynthesis - Light Reaction
29 Questions
3 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What are the two main types of photosynthetic pigments?

  • Chlorophylls and xanthophylls
  • Phycobilins and carotenoids
  • Carotenoids and anthocyanins
  • Chlorophylls and carotenoids (correct)

    • Which component of the photosynthetic apparatus is responsible for capturing light energy?

  • Light harvesting complex (correct)
  • Stroma reaction
  • Chloroplast anatomy
  • Electron transport chain

    • What is the main function of the Calvin-Benson Cycle?

  • Fix carbon dioxide (correct)
  • Capture light energy
  • Produce ATP
  • Release oxygen

    • Which process involves the conversion of light energy into chemical energy in photosynthesis?

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

    In which mechanism of CO2 fixation do plants exhibit a biochemical pathway to minimize photorespiration?

    <p>C4 carbon cycle</p> Signup and view all the answers

    What is the ultimate source of energy for life on Earth?

    <p>Light energy from the sun</p> Signup and view all the answers

    What is the main source of energy for photosynthetic organisms?

    <p>Solar energy</p> Signup and view all the answers

    What type of organisms can use the energy stored in complex carbon compounds synthesized through photosynthesis?

    <p>All forms of life</p> Signup and view all the answers

    What is the relationship between speed of light, frequency, and wavelength?

    <p>$c = \lambda \nu$</p> Signup and view all the answers

    What characterizes a wave in terms of its structure?

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

    What is light described as in addition to being a wave?

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

    Which type of wave is light considered to be?

    <p>Transverse electromagnetic wave</p> Signup and view all the answers

    What dictates transitions to an excited state, according to the laws of quantum mechanics?

    <p>Energy gap between ground state energy and excited state energy</p> Signup and view all the answers

    In pigment excitation, what happens when a quantum has the correct wavelength?

    <p>It is absorbed and raised to an orbital of a higher energy level</p> Signup and view all the answers

    What does the absorption spectrum of chlorophyll indicate about its absorption behavior?

    <p>Strong absorption in blue and red, while green is reflected</p> Signup and view all the answers

    What happens when a pigment molecule absorbs light with the wrong wavelength?

    <p>It will not be absorbed</p> Signup and view all the answers

    How does an excited state molecule behave after absorbing light?

    <p>It emits energy (fluoresces) or drops back to its original ground state</p> Signup and view all the answers

    What happens when an electron is transferred to a more stable orbital on a different atom?

    <p>It increases stability of the atom</p> Signup and view all the answers

    What factor determines the energy (E) of a photon?

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

    In the context of light energy, how is energy related to frequency?

    <p>Directly proportional</p> Signup and view all the answers

    What are molecules that absorb light called?

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

    Which region of the electromagnetic radiation spectrum are human eyes sensitive to?

    <p>Visible-light region</p> Signup and view all the answers

    What is the unit of Planck's constant (h)?

    <p>$J \cdot s$</p> Signup and view all the answers

    Which type of light has higher energy: long wavelengths or short wavelengths?

    <p>Short wavelengths</p> Signup and view all the answers

    What is the role of the ε subunit in ATP synthase?

    <p>Prevents breakdown of ATP</p> Signup and view all the answers

    Which CF0 subunit may form a pathway for proton translocation?

    <p>Subunit III</p> Signup and view all the answers

    What drives the rotation of the γ subunit in ATP synthase?

    <p>Movement of H+ across the membrane</p> Signup and view all the answers

    How many nucleotide-binding sites are there on the CF0–CF1 complex?

    <p>3</p> Signup and view all the answers

    What does the δ subunit link in ATP synthase?

    <p>CF1 to CF0</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser