BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 8, Problem 3A
Summary Introduction
Introduction:
In case of cyclic photophosphorylation, only PSI participates and only ATP molecules are synthesized. In this the electrons flow in a cyclic manner from the PSI reaction centre back to it. This happens when the wavelength of the light is higher than normal. However when the conditions are normal again, non-cyclic photophosphorylation happens to generate both ATP and NADPH by passing the electrons from PSII to PSI.
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Students have asked these similar questions
The excited electron from photosystem I
a. can be returned to the reaction center to generate ATP by cyclic photophosphorylation.
b. is replaced by oxidizing H2O.
c. is replaced by an electron from photosystem II.
d. Both a and c are correct.
Which of the following descriptions about photosystems during linear electron flow is not correct?
Select one:
a. energy required for ATP synthesis is provided when electrons pass through the electron transport chain from photosystem I
b. photosystem II works before photosystem I
c. P680 is the chlorophyll a pair that exists in photosystemII
d. the primary electron acceptor receives electrons from P680 or P700
e. P680+ receives electrons from the splitting of water
This Z diagram of the light dependent reaction shows how an electron moves from the reaction center to
Energy of electrons
a.
b.
Photosystem II
photosystem I.
an electron acceptor.
C. photosystem II.
d.
e.
an electron carrier.
NADP.
complex
21-0
H
411 +0.
Photosystem I
NADP + H
NADP
reductase
NADPH
Chapter 8 Solutions
BIOLOGY
Ch. 8.1 - Prob. 1LOCh. 8.1 - Prob. 2LOCh. 8.2 - Prob. 1LOCh. 8.2 - Differentiate between the light-dependent and...Ch. 8.3 - Discuss how pigments are important to...Ch. 8.3 - Prob. 2LOCh. 8.4 - Prob. 1LOCh. 8.4 - Prob. 2LOCh. 8.5 - Prob. 1LOCh. 8.5 - Prob. 2LO
Ch. 8.6 - Describe carbon fixation.Ch. 8.6 - Prob. 2LOCh. 8.7 - Prob. 1LOCh. 8.7 - Prob. 2LOCh. 8 - Prob. 1DACh. 8 - Prob. 2DACh. 8 - Prob. 3DACh. 8 - The light-dependent reactions of photosynthesis...Ch. 8 - Which region of a chloroplast is associated with...Ch. 8 - The colors of light that are most effective for...Ch. 8 - During noncyclic photosynthesis, photosystem I...Ch. 8 - How is a reaction center pigment in a photosystem...Ch. 8 - The ATP and NADPH from the light reactions are...Ch. 8 - The carbon fixation reaction converts a. inorganic...Ch. 8 - Prob. 8UCh. 8 - Prob. 1ACh. 8 - If you could measure pH within a chloroplast,...Ch. 8 - Prob. 3ACh. 8 - If the Calvin cycle runs through six turns a. all...Ch. 8 - Prob. 5ACh. 8 - Given that the C4 pathway gets around the problems...Ch. 8 - If the thylakoid membrane became leaky to ions,...Ch. 8 - The overall process of photosynthesis a. results...Ch. 8 - Compare and contrast the fixation of carbon in C3,...Ch. 8 - Diagram the relationship between the reactants and...Ch. 8 - Do plant cells need mitochondria? Explain your...
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- The Calvin-Benson cycle starts with _______. a. the absorption of photon energy b. carbon fixation c. the release of electrons from photosystem II d. NADP+ formationarrow_forwardThe overall flow of electrons in the light-dependent reactions is froma. antenna pigments to the reaction center.b. H2O to CO2c. photosystem I to photosystem II.d. reaction center to NADPHarrow_forwardIn photosynthesis, NADPH is the product of a. Photosystem II b. Photosystem I c. the manganese cluster enzyme complex d. P680arrow_forward
- This Z diagram of the light dependent reaction shows how an electron moves from the reaction center to NADP reductase NADP + H¹ NADPH De-f complex H Energy of electrons Photosystem II a. photosystem I. b. an electron acceptor. C. photosystem II. d. an electron carrier. e. NADP. проб 28,0 10. Photosystem Iarrow_forwardThe products of the light-dependent reactions feed intoa. the Calvin cycle. c. glycolysis.b. photosystem I. d. the Krebs cyclearrow_forwardWhich of the following occurs ONLY in photosystem I and NOT in photosystem II? a. The energy of exited electrons is passed from one chlorophyll molecule to the next through resonance transfer b. Light energy is harvested by chlorophyll molecules c. A water molecule is split to provide electrons to a special chlorophyll A pair d. Energy harvested in the light-harvesting complexes excites electrons that can be used directly to reduce NADP+ to NADPH e. High-energy electrons are donated to an electron transport chainarrow_forward
- Which of the following is true of chloroplastic ATP: Select one: a. it is made in the Calvin cycle and consumed in the light reactions b. it is used during photosynthesis, S assimilation, and N assimilation c. it does not leave the chloroplast, and is used to breakdown molecules d. it is made during photosynthesis and S assimilation e. it leaves the chloroplast, and is consumed in respiration and N assimilationarrow_forwardWhich of the following proteins is NOT involved in cyclic electron flow during the light reaction? A. ferredoxin B. plastocyanin C. photosystem I D. photosystem IIarrow_forwardPhotorespiration is avoided in C4 plants becausea. these plants separate the formation of a four-carbon molecule fromthe rest of the Calvin cycle in different cells.b. these plants carry out only anaerobic respiration.c. the enzyme PEP carboxylase functions to maintain high CO2concentrations in the bundle-sheath cells.d. all of the above.e. a and c onlyarrow_forward
- The overall flow of electrons in the light reactions is from a. antenna pigments to the reaction center. b. H2O to CO2. c. photosystem I to photosystem II. d. H2O to NADPH.arrow_forwardThe overall process of photosynthesis a. results in the reduction of CO2 and the oxidation of H2O. b. results in the reduction of H2O and the oxidation of CO2. c. consumes O2 and produces CO2. d. produces O2 from CO2.arrow_forwardGlycolisis Vs Photosynthesis A. Explain similarites and differences. B. Explain their functions C. Explain why they have their ETC D. Explain the concept of autotroph E. Who is the last electron acceptor in Cellular Respiration and why? F. Who is the last electron acceptor in Photosynthesis and why?arrow_forward
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