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 19RQ
Which statement correctly describes carbon fixation?
- the conversion of CO2 into an organic compound
- the use of RuBisCO to form 3-PGA
- the production of carbohydrate molecules from G3P
- the formation of RuBP from G3P molecules
- the use of ATP and NADPH to reduce CO2
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Fill in the blanks with the sentences below:
Energy from ATP and NADPH is used to fix CO2 and form PGAL (Calvin‑Benson cycle)
Pyruvate is broken down into CO2 and acetyl CoA in the matrix
Krebs cycle makes NADH molecules
The absorbed energy is used to make ATP and NADPH (light reactions of photosynthesis)
Glucose is broken down to form pyruvate (glycolysis)
The proton gradient is used to make ATP molecules (chemiosmosis) in the mitochondria
Acetyl CoA enters the Krebs Cycle
ATP molecules are used to power cellular functions in all organisms
1. Light energy is absorbed by the thylakoid membranes in chloroplasts.
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4. PGAL is used to make glucose molecules (energy storage).
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9. NADH from the Krebs cycle and O2 from the light reactions of photosynthesis are used in the electron transport chain to create a proton gradient across the inner membrane of the mitochondria.
10. blank
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Which of the following does not occur in anoxygenic photosynthesis?
Bacteriochlorophyll is involved in the light reaction.
Water is split into oxidized and reduced parts.
The system operates under anaerobic conditions.
O ATP is formed via cyclic photophosphorylation.
Draw a diagram of the dark phase of photosynthesis. You must represent this phase in the
form of a cycle indicating the parts of carboxylation, reduction, generation of hexoses and
regeneration. Ribulose, CO2, rubisco, phosphoglycerate (PGA), bisphosphoglycerate,
phosphoglyceraldehyde (PGAL), ATP, ADP, NADPH, NADP, kinase, fructose, and
glucose should appear.
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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- How would the carbon cycle be influenced by an increase in aerobic respiration? Carbon dioxide would be consumed by aerobic respiration There would be less carbon the oceans There would be less precipitation Carbon dioxide would be released into the atmosphere There would be less photosynthesisarrow_forwardNADH is an output of glycolysis and the citric acid (Kreb’s) cycle carries energy in the form of electrons to the electron transport chain is used in the electron transport chain all of the abovearrow_forwardWhich definition is INCORRECT? A) O Photoexcitation: light absorption leads to raising an electron to a higher energy state. C) O Photolysis: light absorption coupled to splitting a molecule. D) O Photophosphorylation: a form of substrate level phosphorylation used for ATP formation E) O Photosynthesis: is often photoexcitation and photolysis coupled with CO2 fixation and biosynthesisarrow_forward
- . The anaerobic, chemoautotrophic archaeobacterium Methanococcus jannaschii uses which of the following carbon-fixation pathways to obtain organic carbon from CO2? the Hill reaction the Wood-Ljungdahl pathway the Calvin cycle oxygenic photosynthesis the Krebs cyclearrow_forwardWhich of the following statements about photosynthesis is NOT true? Light independent reactions are very similar to the electron transport chain of cellular respiration Light is absolutely essential for both aspects of photosynthesis In order replace electrons, water is split to form oxygen gas Light dependent reactions are very similar, but in reverse, to the Krebs cycle and glycolysisarrow_forwardThe anaerobic, chemoautotrophic archaeobacterium Methanococcus jannaschii uses which of the following carbon-fixation pathways to obtain organic carbon from CO2? the Hill reaction the reductive acetyl-CoA pathway the Calvin cycle oxygenic photosynthesis the Krebs cyclearrow_forward
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