Biochemistry
6th Edition
ISBN: 9781305577206
Author: Reginald H. Garrett, Charles M. Grisham
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 21, Problem 4P
Interpretation Introduction
To propose:
For Q cycle balanced equation is written as the catalyst by the chloroplast cytochrome complex.
Introduction:
Q cycle is defined as the reaction that happens in the series which describes the sequential reduction and oxidation of the Q 10 coenzyme that takes place between forms of ubiquinol and ubiquinone. This enhances the proton movement across the bilayer lipid.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Using the “basic” process of photosynthesis as a control, compare the actual processof C3 photosynthesis as well as contrast C4 and CAM photosynthesis.
Which of the following statements about the light reactions of photosynthesis are correct?
1. Absorption of light does one thing: it makes chlorophyll easier to oxidize.
2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair.
3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+.
4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+.
A.
1,2 and 3
B.
1 and 3
C.
2 and 4
D.
4 only
E. All of 1,2,3 and 4 are correct
When running cycle photophosphorylation and passaging electrons from PSI to two fully reduced PQH2s, how many photons would be necessary for the electrons to complete one cycle?
Chapter 21 Solutions
Biochemistry
Ch. 21 - P700* Has the Most Negative Standard Reduction...Ch. 21 - Prob. 2PCh. 21 - Prob. 3PCh. 21 - Prob. 4PCh. 21 - The Relative Efficiency of ATP Synthesis in...Ch. 21 - pH and in the Chloroplast Proton-Motive Force...Ch. 21 - Prob. 7PCh. 21 - Prob. 8PCh. 21 - Prob. 9PCh. 21 - Prob. 10P
Ch. 21 - Tracing the Fate of CO2 During Photosynthesis...Ch. 21 - Prob. 12PCh. 21 - Prob. 13PCh. 21 - The Source of the Oxygen Atoms in Photosynthetic...Ch. 21 - Prob. 15PCh. 21 - Prob. 16PCh. 21 - Prob. 17PCh. 21 - The Overall Free Energy Change for Photosynthetic...Ch. 21 - Prob. 19PCh. 21 - Prob. 20PCh. 21 - Prob. 21P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.Similar questions
- Describe the flow of electrons through photosystems I and II in the noncyclic electron transport pathway and the products produced. Contrast this flow with cyclic electron transport.arrow_forwardDescribe the pathway of electi on transfer from photosystem II to photosystem I in light-dependent reactions.arrow_forwardDuring photosynthesis where does the primary electrons come from that enter photosystems II? What is the purpose of the electron transport chain in the thylakoid? Why do the light reactions create ATP NADPH?arrow_forward
- The light reactions of photosynthesis take place in the thylakoid disk the outer membrane of the chloroplast the stroma of the chloroplast cytoplasm of the host cellarrow_forwardxygen Production Your experimental team has gathered data on the rate of a plant's photosynthesis, measured by oxygen production, as the light intensity was increased. The graph below was created from your gathered data. Note: Diagram 4 may also be helpful in answering the questions. Use the information in order to answer questions #28 -31. Diagram 7: Rate of Photosynthesis with increasing light intensity 200 - Pmax 150 - 100 - 50 50- -100 100 200 300 400 500 600 700 Light Intensity (arbitrary units) Glossary: 1. Pmax: The maximum pressure of oxygen gas. 2. Arbitrary units: The use of this term mean the graph is not using specific units as labels. Light intensity could be measured in lumens and oxygen production could have been measured in mm of Hg Select the best explanation for the oxgen production leveling off as the light increases in intensity. More light reduces the activity of the chlorophyll by breaking the pigment down. More light prevents water from getting to the leaf cells…arrow_forwardWhy can photosynthesis be generally considered as a redox process? 3-6 snetencesarrow_forward
- Condition: A transmembrane (or integral membrane) protein that acts as a H+ channel has been added to the thylakoid membrane. What impact will thishave to photosynthesis? Explain why. (Specific values are not required, just an indication of overall effect and reasons why.)arrow_forwardExplain in detail of the stages of photosynthesis without explaining all the reactions of each pathways, but state the key steps of each pathway. Mention the location where each pathway happens in the plant and lastly make a table of the products formed at the end of the stage (ATPs, NADPHs, and water). Discuss about the oxidation-reduction of various molecules that are a part of these pathways.arrow_forwardExplain why both starch synthesis and the activity of the Triose-P Phosphate translocator serve to maintain the ability of the chloroplast to maintain high photosynthetic rates.arrow_forward
- one < A olchs.quiz-Iti-pdx-prod.instructure.com AA 55:15 Time Remaining Return Diagram 4: The Light Reactions of Photosynthesis STROMA Jow H concentration) Cytochrome complex Photosystem II Photosystem I Light NADP reductase 4H Light NADP H NADPH THYLAKOID SPACE (high H concentration) +2 H To Calvin -Cycle Thylakold membrane ATP- synthase STROMA (low H concentration) ADP ATP Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a leaf cell. The events of the light dependent cycle that take place along the thylakoid membrane are shown. In the Thylakoid space water is split into O 02 H* and electrons O Ht, ATP and O2 O Photosystem II, electrons and oxygen O 02 and chlorophyll Previousarrow_forwardWhich of the following is not involved in cyclic cyclic photophosphorylation? O cytochrome bf complex O plastocyanin O P680 Oferredoxinarrow_forward3. For PSII, the cytochrome complex, and PSI, draw and label what happens at that structure on Diagram 6. Then describe the events in a bulleted list in Table 1. Table 1: Descriptions of the steps in the light reactions. Structure What is happening with matter? PSII cytochrome complex f What is happening with energy? 4 At the end of the electron transport chain, where is the light energy that was absorbed and converted by chlorophyll stored? List two answers, LIDE C EMERSINEMIS MENOR mang U □ Marrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
BiochemistryBiochemistryISBN:9781305577206Author:Reginald H. Garrett, Charles M. GrishamPublisher:Cengage Learning
Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY