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
Textbook Question
Chapter 21, Problem 14P
The Source of the Oxygen Atoms in Photosynthetic O2 Evolution
The overall equation for photosynthetic CO2 fixation is 6CO2 + 6H2O
Atoms, yet there are only 6 O atoms in C6H12O6. How can you account for these discrepancies? (Hint: Consider the partial reactions of photosynthesis: ATP synthesis, NADP reduction, photolysis of water, and the overall reaction for hexose synthesis in the Calvin-Benson cycle)
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Photosynthesis and cellular respiration are found throughout the eukaryotic world. They arecomplementary to each other because they each use products of the other process. Evaluatethe concept that there is a common ancestry for all organisms. What evidence exists that theevolution of photosynthesis and cellular respiration support this concept?
Photosystem II uses sunlight to strip electrons (and protons) away from which of the following substrate molecules (in the chloroplasts of green plants and green algae)?
C6H12O6 only
C6H12O6, H2O, and CO2 only
CO2 only
H2O and C6H12O6 only
H2O only
Light
Reactions
Dark Reactions
Sugar
Chloroplast
Light
ATP
NADPH
Calvin
cycle
NADP
ADP
Granum
H,O
co,
Figure 7.3. Processes of photosynthesis. The light reactions directly require
light energy from the sun. The "dark reactions" are driven by the high energy
electrons produced by the light reactions.
Some biologists refer to the two parts of photosynthesis as the light
reactions and the synthesis reactions. Which
part
do
you think that
they call the light reactions?
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
- What would the world look like if oxygenic photosynthesis never evolved to what it became today? What does this mean for the processes within photosynthesis? Must use words: H2S, Krebs Cycle, Glycolysis, Electron Transport Chain (ETC).arrow_forwardOxygenic photosynthesis in eukaryotes (in the chloroplasts of green algae and green plants) consumeswhich of the following substrate molecules (to generate glucose, water, and oxygen product molecules)?A. C12H22O11 + H2OB. C6H12O6 + 6O2 + 6H2OC. 6CO2 + 12H2OD. C6H12O6 + C6H12O6E. 6CO2 + 12H2Sarrow_forward13arrow_forward
- urgeennnttttttarrow_forwardWhat would the graph look like if you did the same exact experiment but measured carbon dioxide instead of oxygen? You can explain in words or draw a sketch. Don't worry about the numbers just show the trend (would carbon dioxide be increasing, decreasing or staying the same between 0 and 30 minutes and fomr 30-60 minutes?). - photosynthesis 6CO, + 6H,0 + energy → C,H;0, + 60; energy in aerobic respiration C.HO 60 - 6CO; + 6H;0 + energy energy out 02 level vs Time 19.7 19.65 25,203 étv Aa MacBook Air 80 DII DD F2 F3 F6 F7 F8 F9 F10 F11 & 4 5 6 7 8. E R Y D H. J K C V M * 00 B *3arrow_forwardWhy photosynthesis is considered as a process supporting all life on Earth?arrow_forward
- part C urgentlyarrow_forwardPlant chloroplasts are able to generate which of the following inorganic product molecules during oxygenic photosynthesis? cell biology C6H12O6 CO CO2 O2 H2Sarrow_forwardWhat process is shown in the figure below? 3 Molecules CO2 RuBisCO Stage 1: carbon fixation 3 ADP 6 ATP ЗАТР 6 ADP Stage 3: regeneration of RUBP Stage 2: reduction 6 NADPH - 6 NADP*+ H* Sugar O Glycolysis O Light reactions of photosynthesis Oxidative phosphorylation Citric Acid Cycle O Dark reactions of photosynthesisarrow_forward
- How would your understanding be different if the experiment had only looked at the overall results on the light reactions, instead of looking at how salinity affected each photosystem?arrow_forwardPhotosynthesis is the most important producer of molecular oxygen (02) on our planet. From which molecule do oxygen atoms liberated by photosynthesis come? From which other molecule could one suspect they have come? What are the destinations of those oxygen atoms?arrow_forwardDuring oxygenic photosynthesis in eukaryotes, which substrate molecules provide the oxygen atoms that end up in product glucose molecules? CO2 only H2O and C6H12O6 only H2O only C6H12O6 and O2 only O2 onlyarrow_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 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
Biology: The Unity and Diversity of Life (MindTap...BiologyISBN:9781337408332Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa StarrPublisher:Cengage Learning
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Biology: The Unity and Diversity of Life (MindTap...
Biology
ISBN:9781337408332
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
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