Concept explainers
In antenna complexes, how is energy transferred among the pigment molecules?
a. by heat
b. by
c. by fluorescence
d. by resonance
Introduction:
Antenna complexes, also known as the light-harvesting complexes, are protein and pigment complexes present in thylakoid membrane of plants that transfer the electrons to the electron acceptor at the photosynthetic reaction center.
Answer to Problem 1TYK
Correct answer:
By resonance.
Explanation of Solution
Explanation/Justification for the correct answer:
Option (d) is given by resonance. The light-sensitive molecules are also called chromophores. The antenna complex pigments absorb the photons from the incoming solar radiation, which then transfers the associated energy to the nearby chlorophyll molecule. This results in the excitation of another electron. Hence, option (d) is correct.
Explanation for incorrect answers:
Option (a) is given as by heat. The heat energy from the incoming solar radiation is not absorbed by the chromophore molecule (antenna complex); thus, it cannot transfer the heat energy for the excitation of the electron in the chlorophyll. So, it is a wrong answer.
Option (b) is given as redox reactions. The redox reactions involve the transfer of energy by the transfer of the electrons and the fluorescence energy transfer involves the transfer of the light energy. So, it is a wrong answer.
Option (c) is given as fluorescence. Furthermore, it is not responsible for the excitation of the electron in the chlorophyll as a result of the transfer of energy from the antenna complex. So, it is a wrong answer.
Hence, options (a), (b), and (c) are incorrect.
The mechanism of transfer of the energy among the molecules that are light sensitive is referred to as resonance or fluorescence resonance energy transfer.
Want to see more full solutions like this?
Chapter 10 Solutions
Biological Science (6th Edition)
- If you could measure pH within a chloroplast, where would it be lowest? a. In the stroma b. In the lumen of the thylakoid c. In the cytoplasm immediately outside the chloroplast d. In the antenna complexarrow_forwardWhat is line A pointing to? A. cell membrane B. cell wall C. mitochondria D. nucleusarrow_forwardWhat happens when light hits the pigments, P680 and P700. during the light-dependent reactions? A. Excited electrons are passed to electron acceptors B. Glucose is produced C. Carbon fixation occurs D. Electrons are fused to form ATParrow_forward
- What does line B point to in the image? A. cell membrane B. cell wall C. nucleus D. chloroplastarrow_forwardWhich type of cell responds best to stationary bars of a particular orientation? a. complex b. end-stopped c. jail d. simplearrow_forwardWhat are the roles of ATP and NADPH in photosynthesis? a. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce sugars. b. ATP and NADPH are forms of chemical energy produced from the light independent reactions, to be used in the light dependent reactions that produce sugars. c. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that produce proteins. d. ATP and NADPH are forms of chemical energy produced from the light dependent reactions to be used in the light independent reactions that use sugars as reactants.arrow_forward
- What is the color of the visible light that is not utilized in photosynthesis? Select one: a. orange b. green c. blue d. yellow e. redarrow_forwardplease use the image to answer A and B.a. which data represents the chloroplast? explain.b. which organelle is more at risk to changing concentrations of DNP? explain.arrow_forwardA researcher decides to isolate thylakoid membranes and add protons to the space inside the thylakoids by soaking the thylakoids in acetic acid, which diffuses through the membrane, and then washing the thylakoids very quickly. What will happen? A. The scheme will run in reverse. B. ATP will be able to be made without light. C. Light will be emitted by the thylakoids. D. The membranes will dissolve.arrow_forward
- A plant has a unique photosynthetic pigment. The leaves of this plant appear to be blue-green. What wavelengths of visible light are not being absorbed by this pigment? A. red and yellow B. blue and green C. green and yellow D. blue, green, and red E. green, blue, and violetarrow_forwardDefine the following terms: a. photosynthesis b. thylakoid membrane c. MAP d. IFT e. polycystic kidney diseasearrow_forwardWhat happens to microtubules in the presence of very high levels of GTP? A. They will undergo treadmilling B. They will grow rapidly C. They become unstable and may undergo catastrophy D. They will shrinkarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education