Chapter 10

Last update by mayurcooled on 04/16/2014
185306 People have viewed this Quiz
  • Share

What is the relationship between wavelength of light and the quantity of energy per photon?
a. They have a direct, linear relationship.
b. They are inversely related.
c. They are logarithmically related.
d. They are separate phenomena.
e. They are only related in certain parts of the spectrum.

Answer:
B: They are inversely related.

View Chapter 10 as Flashcard Deck

Related Quiz Content
  • Someone
    Answered in Chapter 10
    In a protein complex for the light reaction (a reaction center), energy is transferred from pigment molecule to pigment molecule, to a special chlorophyll a molecule, and eventually to the primary electron acceptor. Why does this occur?
    a. The action spectrum of that molecule is such that it is different from other molecules of chlorophyll.
    b. The potential energy of the electron has to go back to the ground state.
    c. The molecular environment lets it boost an electron to a higher energy level and also to transfer the electron to another molecule.
    d. Each pigment molecule has to be able to act independently to excite electrons.
    e. These chlorophyll a molecules are associated with higher concentration of ATP.
    C: The molecular environment lets it boost an electron to a higher energy level and also to transfer the electron to another molecule.
  • Someone
    Answered in Chapter 10
    P680+ is said to be the strongest biological oxidizing agent. Why?
    a. It is the receptor for the most excited electrons in either photosystem.
    b. It is the molecule that transfers electrons to plastoquinone (Pq) of the electron transfer system.
    c. NADP reductase will then catalyze the shift of the electron from Fd to NADP+ to reduce it to NADPH.
    d. This molecule results from the transfer of an electron to the primary electron acceptor of photosystem II and strongly attracts another electron.
    e. This molecule is found far more frequently among bacteria as well as in plants and plantlike Protists.
    D: This molecule results from the transfer of an electron to the primary electron acceptor of photosystem II and strongly attracts another electron.
  • Someone
    Answered in Chapter 10
    Some photosynthetic bacteria (e.g., purple sulfur bacteria) have photosystem I but not II, while others (e.g. cyanobacteria) have both PSI and PSII. Which of the following might this observation imply?
    a. Photosystem II must have been selected against in some species.
    b. Photosystem I must be more ancestral.
    c. Photosystem II may have evolved to be more photoprotective.
    d. Cyclic flow must be more primitive than linear flow of electrons.
    e. Cyclic flow must be the most necessary of the two processes.
    B: Photosystem I must be more ancestral.
  • Someone
    Answered in Chapter 10
    Cyclic electron flow may be photoprotective (protective t light-induced damage). Which of the following experiments could provide information on this phenomenon?
    a. using mutated organisms that can grow but that cannot carry out cyclic flow of electrons and compare their abilities to photosynthesize in different light intensities
    b. using plants that can carry out both linear and cyclic electron flow, or only one or another of the processes, and measuring their light absorbance
    c. using bacteria that have only cyclic flow and look for their frequency of mutation damage
    d. using bacteria with only cyclic flow and measuring the number and types of photosynthetic pigments they have in their membranes
    e. using plants with only photosystem I operative and measure how much damage occurs at different wavelengths
    A: using mutated organisms that can grow but that cannot carry out cyclic flow of electrons and compare their abilities to photosynthesize at different light intensities
  • Someone
    Answered in Chapter 10
    Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants?
    a. They serve as accessory pigments.
    b. They dissipate excessive light energy.
    c. They cover the sensitive chromosomes of the plant.
    d. They reflect orange light.
    e. They take up toxins from the water.
    B: They dissipate excessive light energy.
  • Someone
    Answered in Chapter 10
    In thylakoids, protons travel through ATP synthase from the stroma to the thylakoid space. Therefore the catalytic knobs of ATP synthase would be located
    a. on the side facing the thylakoid space
    b. on the ATP molecules themselves
    c. on the pigment molecules of PSI and PSII
    d. on the stroma side of the membrane
    e. built into the center of the thylkoid stack (granum)
    D: on the stroma side of the membrane
  • Someone
    Answered in Chapter 10
    Which of the following statements best represents the relationships between the light reactions and the Calvin cycle?
    a. The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions.
    b. The light reactions provide ATP and NADPH to the carbon fixation step of the Calvin cycle, and the cycle provides water and electrons to the light reactions.
    c. The light reactions supply the Calvin cycle with CO2 to produce sugars, and the Calvin cycle supplies the light reactions with sugars to produce ATP.
    d. The light reactions provide the Calvin cycle with oxygen for electron flow, and the Calvin cycle provide the light reactions with water to split.
    e. There is no relationship between the light reactions and the Calvin cycle.
    A: The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions.
  • Someone
    Answered in Chapter 10
    Where do the enzymatic reactions of the Calvin cycle take place?
    a. stroma of the chloroplast
    b. thylakoid membranes
    c. outer membrane of the chloroplast
    d. electron transport chain
    e. thylakoid space
    A: stroma of the chloroplast
  • Someone
    Answered in Chapter 10
    What is the primary function of the Calvin cycle?
    a. use ATP to release carbon dioxide
    b. use NADPH to release carbon dioxide
    c. split water and release oxygen
    d. transport RuBP out of the chloroplast
    e. synthesize simple sugars from carbon dioxide
    E: synthesize simple sugars from carbon dioxide
  • Someone
    Answered in Chapter 10
    For the following question, compare the light reactions with the Calvin cycle of photosynthesis in plants.

    Produces molecular oxygen (O2)
    a. light reactions alone
    b. the Calvin cycle alone
    c. both the light reactions and the Calvin cycle
    d. neither the light reactions nor the Calvin cycle
    e. occurs in the chloroplast but is not part of photosynthesis
    A: light reactions alone
  • Someone
    Answered in Chapter 10
    For the following question, compare the light reactions with the Calvin cycle of photosynthesis in plants.

    Requires ATP
    a. light reactions alone
    b. the Calvin cycle alone
    c. both the light reactions and the Calvin cycle
    d. neither the light reactions nor the Calvin cycle
    e. occurs in the chloroplast but is not part of photosynthesis

    B: the Calvin cycle alone