OXYGEN CONCENTRATION IN THE WATER OF A LAKE Hours of Durkness 06:00 08.00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 24.00 02:00 04:00 06:00 Time of Day 3. What most likely causes the trends in oxygen concentration shown in the graph above? (A) The water becomes colder at night and thus holds more oxygen. (B) Respiration in most organisms increases at night. (C) More organisms are respiring at night than during the day. (D) Photosynthesis produces more oxygen than is consumed by respiration during the day. Oxygen Concentration (ppm)

OXYGEN CONCENTRATION IN THE WATER OF A LAKE Hours of Durkness 06:00 08.00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 24.00 02:00 04:00 06:00 Time of Day 3. What most likely causes the trends in oxygen concentration shown in the graph above? (A) The water becomes colder at night and thus holds more oxygen. (B) Respiration in most organisms increases at night. (C) More organisms are respiring at night than during the day. (D) Photosynthesis produces more oxygen than is consumed by respiration during the day. Oxygen Concentration (ppm)

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter8: Photosynthesis

Section: Chapter Questions

Problem 4TYK

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1.) [Cellular Respiration] Among the glycolysis products, which will most likely to make a high net production of ATP? a.) CO2 b.)NADH c.)H2O d.)ATP Synthase 2.) [Photosynthesis] What similar feature of both mitochondria and chloroplasts is known to help in their role in photosynthesis and respiration? a.) increased organelle volume b.) Decreased organelle volume c.) Increased membrane thickness d.) Increase membrane protein content
1. A) For the schematic of a chloroplast shown in the image attached, match the major input and output molecules of photosynthesis to the letters shown. Molecules: CO2, H2O, O2, sugar A: B: C: D: B) In the image attached, the light reactions are shown to take place in the thylakoid. Where specifically do these reactions take place? C) Where does the Calvin cycle take place?
Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma but the photosystems and membrane proteins of the electron transport chain are unharmed. This damage will have the most direct effect on which of the following processes?
If 30 molecules of CO2 enter the Calvin Cycle,a. How many molecules of phosphoglycerate (PGA) will be produced? b. How many molecules of glyceraldehyde phosphate (PGAL) leave the cycle? c. How many molecules of ribulose bisphosphate (RuBP) will be produced? d. How many molecules of ATP will be utilized?
Comparing photosynthetic and respiratory electron transport one notices key similarities as well as key differences. In which of the following ways is the two electron transport chains similar? 1. In both, electrons flow from a more negative to a more positive redox potential. 2. They both contain supermolecular complexes that hold redox-active cofactors. 3. They both can be uncoupled from ATP generation by the addition of chemical uncouplers. 4. The final product of both electron transport chains is an energy rich metabolite. 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.
2.) A.) Explain how electron transfer leads to ATP biosynthesis in the light reactions of photosynthesis. You must give details about how electron flow builds a pH gradient and a description of the compartments in the chloroplast in relation to pH. Also, compare the ETC of the mitochondrion with the ETC of the light reactions for both the source and destination for electrons. B.) Would ATP biosynthesis happen if ionophores, which would create holes in the thylakoid membrane and allow uncontrolled passage of charged molecules such as protons between compartments, are provided to the chloroplast? Why or why not? C.) How would you modify Complex I of the electron transport chain to decrease ATP yield from Step 3 of β-oxidation? As part of this, you must explain why there is a difference in ATP yield between NADH and FADH 2 AND give a specific change to the ETC that would decrease ATP yield from Step 3
What do photosynthesis and cellular respiration have in common? Which ones are true? A. Both have large protein complexes that pump electrons across a membrane. b. Both require oxygen as an electron acceptor. c. Both have electron transport chains that begin with electrons from a high energy electron carrier. d. Both utilize the energy from a gradient
When researchers shifted isolated chloroplasts from a low pH solution to a more alkaline (higher pH) solution, ATP synthesis occurred even in the absence of light! This was an experiment used to support the chemiosmosis mechanism of ATP formation in chloroplasts. Why?
Please help! Photosynthesis and Cell respiration: A. What should happen to the O2 levels in a closed container containing a plant during the day? why? B. And what happens to the O2 levels during the night (no light)? Why?
1. Why is water split by PSII in the light reactions? 2. How is ATP synthesis powered in the light reactions? How does this compare to the oxidative phosphorylation of Cellular Respiration?
These are the two by-products of the citric acid cycle that are needed in the electron transport chain A. NAD and FAD B. NADH and FADH2 C. NADH and FADH D. NADH2 and FADH2 Aside from the citric acid cycle, what other cellar respiration process happen inside the mitochondria? A. Electron transport chain B. Krebs cycle C. Glycolysis D. Photosynthesis What process uses the products of light-dependent reaction such as ATP and NADPH? A. Krebs cycle B. Electron transport chain C. Light-independent reaction D. Dark-independent reaction
A decrease in entropy occurs during the CO2 uptake phase of the Calvin cycle, as freely moving CO2 molecules become fixed into a carbon skeleton. How can this occur without direct participation by NADPH and/or ATP?