Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 7.3, Problem 1CC
Summary Introduction
To analyze:
The point at which electron has highest amount of energy from photosystem II to NADP+.
Introduction:
The electron moves in a zigzag manner through a series of energy changes that take place during photosynthesis. This is referred to as Z-scheme, which has been proposed by Hill and Bendall.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In photosynthetic organisms that have two photosystems, a key reason to increase non-cyclic
electron flow through photosystem complexes is to:
1) The light reactions begin with sunlight striking a photosystem. Which photosystem is this and what happens to the electrons there?
2) What happens to this first photosystem to prepare it to become activated by additional sunlight?
3) Why are there two different photosystems in the light reactions.
4) Where do these electron reside at the end of the Calvin Cycle (dark reactions)?
Daniel Arnon and coworkers carried out experiments with intact, salt-
washed chloroplasts to study photophosphorylation. When the chloroplasts
were illuminated in the presence of ADP +P, ATP was produced, but
oxygen was not produced or nor consumed. ATP formation was not accom-
panied by a measurable electron transport involving any external electron
donor or acceptor. The overall reaction for this result is:
ADP + P -", ATP
When NADP+ was included in addition to the ADP + P, ilumination of the
intact chloroplats again resulted in resulted in the photophosphorylation of
ADP to ATP. In addition, the NADPpt was reduced to NADPH + H* and o,
was produced. Moreover, the light-induced reduction of NADP* was greatly
decreased if ADP + P; were ommitted. The equation for this reaction is:
NADP* + H,0 + ADP + R -", NADPH + H + ATP + }02
Briefly describe the mechanism(s) of these two types of photophosphoryla-
tion that explain all of these results.
Chapter 7 Solutions
Principles of Biology
Ch. 7.1 - Which types of organisms carry out cellular...Ch. 7.1 - Prob. 1BCCh. 7.1 - Prob. 2CCCh. 7.1 - Prob. 1TYKCh. 7.1 - If you were traveling from the cytosol to the...Ch. 7.1 - Prob. 3TYKCh. 7.2 - Prob. 1CCCh. 7.2 - Prob. 2CCCh. 7.2 - What is the advantage of having different pigment...Ch. 7.2 - Prob. 4CC
Ch. 7.2 - Prob. 5CCCh. 7.2 - Prob. 1TYKCh. 7.2 - Prob. 2TYKCh. 7.2 - What is the purpose of cyclic...Ch. 7.3 - Prob. 1CCCh. 7.3 - Prob. 1TYKCh. 7.3 - Prob. 2TYKCh. 7.4 - Prob. 1CCCh. 7.4 - Prob. 1TYKCh. 7.4 - Prob. 2TYKCh. 7.5 - Prob. 1CCCh. 7.5 - Prob. 1BCCh. 7.5 - What are the advantages and disadvantages for C3,...Ch. 7.5 - Prob. 1TYKCh. 7.5 - An evolutionary adaptation to minimize...Ch. 7 - The water necessary for photosynthesis is split...Ch. 7 - Prob. 2TYCh. 7 - Prob. 3TYCh. 7 - Prob. 4TYCh. 7 - During the first phase of the Calvin cycle, carbon...Ch. 7 - Prob. 6TYCh. 7 - Prob. 7TYCh. 7 - Prob. 8TYCh. 7 - Prob. 9TYCh. 7 - Plants commonly found in hot and dry environments...Ch. 7 - What are the two stages of photosynthesis? What...Ch. 7 - What is the function of NADPH in the Calvin cycle?Ch. 7 - A principle of biology is that living organisms...Ch. 7 - Discuss the advantages and disadvantages of being...Ch. 7 - Prob. 2CBQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What is the overall purpose of the light reactions in photosynthesis?arrow_forwardWhich of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2arrow_forwardWhich of the following correctly sequences the steps of non-cyclic electron transport? * Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions The ATP and NADPH generated by the reactions of photosystem Il and photosystem I are utilized by the Calvin Cycle to build high energy glucose molecules Electrons donated from water molecules pass through photosystem I then O photosystem II before returning to the chlorophyll molecules, generating ATP in the process Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules ) This is a required questionarrow_forward
- Choose all that apply: The final electron acceptor(s) associated with photosystem II is/are: NADP+ 02 Photosystem I ATParrow_forwardIn what ways is nonoxygenated photosynthesis that uses H2S as an electron source similar to oxygenic photosynthesis that uses H2O as an electron source? In what ways are they different?arrow_forwardPut the events in correct order: + A photon of light excites a pigment molecule in photosystem I + Excitation is transferred to the photosystem Il reaction center chlorophyll * The photosystem Il electron is replaced by splitting of water + Excitation is transferred to the photosystem I reaction center chlorophyll + An electron is donated to NADP+ + A photon of light excites a pigment molecule in photosystem II + The photosystem II reaction center chlorophyll donates an electron to photosystem I via an electron transport chainarrow_forward
- Choose the CORRECT order of reactions that are conducted by photosystem I. P700 is activated by two photons → two Chl A0 accept two high-energy electrons → one quinone A1 is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one NADP+ P680 is activated by two photons → two Chl A0 accept two high-energy electrons → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase oxidizes one ferredoxin at a time to reduce FAD to FADH- and then to FADH2 → the proton-motive force is created P700 is activated by a photon → Chl A0 accepts two high-energy electrons → one plastoquinone QA is fully reduced → two electrons are passed on one 4Fe–4S cluster → two molecules of ferredoxin are reduced → ferredoxin–NADP+ reductase takes two protons from the stroma and reduces one FAD P700 is activated by a photon → pheophytin accepts two high-energy electrons →…arrow_forwardWhich of the following accepts an electron from water in photosynthesis? P680 in Photosystem II O P700 in Photosystem I Oxygen in Photosystem II O NADP* in Photosystem Iarrow_forwardWhy is the carbon dioxide concentration a limiting factor of the photosynthesis process? When the carbon dioxide concentration is increased indefinitely is photosynthesis also increased indefinitely?arrow_forward
- Name the process of conversion of ADP into ATP during the first phase of photosynthesis.arrow_forwardIn the Light Reaction of Photosynthesis, the sun excites electrons in pigment molecules in the photosystems. These excited electrons and (H+ ions) go through electron transport systems. Keep in mind that if this process continued as stated, the pigment molecules would run out of electrons, but fortunately there is a way in which the excited electrons are replaced. Explain how the electrons are ultimately replaced and what the important byproduct is.arrow_forwardCan cyclic electron transport alone support photosynthesis?explainarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Concepts of Biology
Biology
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:OpenStax College
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY