Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 8, Problem 13RQ
From which component of the light-dependent reactions does NADPH form most directly?
- photosystem II
- photosystem I
- cytochrome complex
- ATP synthase
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Diagram 4: The Light Reactions of Photosynthesis
STROMA
(low H* concentration)
Cytochrome
complex
Photosystem I
Photosystem I
Light
NADP
reductase
4H
NADP + H
NADPH
THYLAKOID SPACE
(high H* concentration)
4 H*
Thylakoid
membrane
ATP
synthase
STROMA
(low H concentration)
ADP
Diagram 4 shows a single thylakoid membrane taken from a chloroplast inside of a
the light dependent cycle that take place along the thylakoid membrane
In the Thylakoid space water is split into
O 02 H* and electrons
O H*, ATP and O2
O Photosystem II, electrons and oxygen
O 02 and chlorophyll
Place the following steps of the Light-Reactions of Photosynthesis in order.
Production of NADPH
Absorption of light
Electron transport chain & Production of ATP
Photosystem II
Photosystem I
To which substance does ferredoxin transfer an electron?
O photosystem I
O photosystem II
O NADP+
O NADPH
Chapter 8 Solutions
Biology 2e
Ch. 8 - Figure 8.6 On a hot, dry day, plants close their...Ch. 8 - Figure 8.16 What is the source of electrons for...Ch. 8 - Figure 8.18 Which of the following statements is...Ch. 8 - Which of the following components is nor used by...Ch. 8 - What two main products result from photosynthesis?...Ch. 8 - In which compartment of the plant cell do the...Ch. 8 - Which statement about thylakoids in eukaryotes is...Ch. 8 - Predict the end result if a chloroplast’s light-,...Ch. 8 - How are the NADPH and GA3P molecules made during...Ch. 8 - Which of the following structures is not a...
Ch. 8 - How many photons does it take to fully reduce, one...Ch. 8 - Which complex is not involved in the establishment...Ch. 8 - From which component of the light-dependent...Ch. 8 - Three of the same species of plant are each grown...Ch. 8 - Plants containing only chlorophyll b are exposed...Ch. 8 - Which molecule must enter the Calvin cycle...Ch. 8 - Which order of molecular conversions is correct...Ch. 8 - Where in eukaryotic cells does the Calvin cycle...Ch. 8 - Which statement correctly describes carbon...Ch. 8 - If four molecules of carbon dioxide enter the...Ch. 8 - What is the overall outcome of the light reactions...Ch. 8 - Why are carnivores, such as lions, dependent on...Ch. 8 - Why are energy carriers thought of as either...Ch. 8 - Describe how the grey wolf population would be...Ch. 8 - How does the closing of the stomata limit...Ch. 8 - Describe the pathway of electi on transfer from...Ch. 8 - What are the roles of ATP and NADPH in...Ch. 8 - How and why would the end products of...Ch. 8 - Why is the third stage of the Calvin cycle called...Ch. 8 - Which part of the light-independent reactions...Ch. 8 - Why does it take three turns of the Calvin cycle...Ch. 8 - Imagine a sealed terrarium containing a plant and...Ch. 8 - Compare the flow of energy with the flow of,...
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- Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2arrow_forwardWhat is the overall purpose of the light reactions in photosynthesis?arrow_forwardThe Overall Free Energy Change for Photosynthetic NADP+ Reduction What is the overall free energy change (G) for noncyclic photosynthetic electron transport? 4 (700-nm photons) + 4 (680-nm photons) + 2 H2O + 2 NADP+O2 + 2 NADPH + 2H+arrow_forward
- Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of photosynthesis by exposing the green alga Chlorella to CO2 labeled with the radioisotope carbon 14. By looking at which compounds the C14 ended up in, they were able to identify all intermediates in this cyclic pathway. Why did they predict correctly that the same set of intermediates would be formed in the light reaction in land plants?arrow_forwardMatch each term with its most suitable description. ____ PGAL formation a. absorbs light ____CO2 fixation b. converts light to chemical energy ____ autotroph c. self-feeder ____ ATP forms NADPH does not d. electrons cycle back to photosystem ____ photorespiration e. problem in C3 plants ____ photosynthesis f. Calvin-Benson cycle product ____ pigment g. water molecules split ____ photolysis in photosynthesis h. rubisco functionarrow_forwardWhich part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?arrow_forward
- Which 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_forwardWhich of the following reactions produces the oxygen released by photosynthesis? chemiosmosis reduction of NADP+ splitting of water molecules electron transfer in photosystem Iarrow_forwardWhich of the following is not produced during the light reactions of photosynthesis? H2O NADPH O2 ATParrow_forward
- Identify the correct compound to create a chemical equation that represents Photosynthesis. + Drag and drop the right reactants and products of the Light Dependent and Light Independent (aka Dark) Reactions. Chloroplast NADPH NADP+ ADP Water - H20 Calvin Cycle Glucose - C6H1206 ATP Light Reaction Thylakoids Stroma O2 Carbon Dioxide CO2 Identify the reactants and products that are used and given off by plants and animals.arrow_forwardTpoint Diagram 4: The Light Reactions of Photosynthesis STROMA (low H concentration) Photosystem II Cytochrome complex Photosystem I Light NADP reductase 4 H Light NADP + H NADPH THYLAKOID SPACE (high H concentration) To Calvin Cycle Thylakoid membrane ATP synthase STROMA ADP (low H concentration) 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. Water is important to the production of ATP because water will provide the electrons that flow through the ATP synthase O provide the energy for ATP synthase to transfer into the bonds of ATP. flow through ATP synthase allowing for the production of ATP provide the H* that flows through the ATP synthase allowing for the ATP production.arrow_forwardWhich of the following defines photorespiration? The metabolic pathway by which most autotrophs use the energy of light to make sugars from carbon dioxide and water The light-independent reactions of photosynthesis Process by which electron flow through electron transfer chains sets up a hydrogen ion gradient that drives ATP formation An inefficient metabolic pathway of producing sugars that occurs when O2 attaches to rubiscoarrow_forward
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