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 20RQ
If four molecules of carbon dioxide enter the Calvin cycle (four “turns” of the cycle), how many G3P molecules are produced and how many are exported?
- 4 G3P made, 1 G3P exported
- 4 G3P made, 2 G3P exported
- 8 G3P made, 1 G3P exported
- 8 G3P made, 4 G3P exported
Expert Solution & Answer
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Which among the following statements is INCORRECT?
The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which forms a
six-carbon molecule that breaks down into two 3PG molecules.
The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which is a
reaction assisted by large quantities of RuBP carboxylase enzyme.
The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which decreases
cell carbon dioxide levels, which increases the diffusion gradient.
The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which
immediately becomes a six-carbon sugar that is the base for starch, sucrose, cellulose, etc.
Which of the following statements related to the Calvin Cycle is CORRECT?
Six molecules of G3P are produced for every three carbon dioxide that undergo calvin cycle
Carbon dioxide is attached to 3-phosphoglycerate resulting is 2 RuBP
The regeneration of RuBP is important because it is directly used for the production of starch, cellulose, and glucose.
One molecule of G3P exits the calvin cycle and five is used to form glucose for the production of starch, cellulose, and
sucrose.
Consider the following diagram of a chloroplast. Label "C" represents the:
Stroma
Thylakoid
Lumen
Granum
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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_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_forwardStatement 1: In order to produce 1 molecule of glucose, we need 6 molecules of Carbon Dioxide (CO2), 6 molecules of RuBP, 12 NADPH, and 12 ATP. Statement 2: In order to produce 1 G3P and 3 RuBP in the Calvin Cycle, we need 3 molecules of Carbon Dioxide (CO2), 3 molecules of RuBP, 6 NADPH, and 9 ATP. Hide answer choices Statement 1 is true; Statement 2 is false Statement 1 is false; Statement 2 is true Both statements are true Both statements are falsearrow_forward
- 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?arrow_forwardPhotosynthesis and Respiration are opposing processes. One is required to produce food, the other to derive energy from food. Each of these processes involves a cycle to complete its goal. For Photosynthesis it is the Calvin Cycle; for Respiration it is the Krebs Cycle. Listed below are features of both cycles. Indicate which 5 of them are associated with the Calvin Cycle. Creates glucose ATP and CO2 are used ATP and CO2 are produced O A catabolic process An anabolic process. Oxidizes glucose O Occurs in mitochondria O Occurs in chloroplasts Occurs only in green organisms Occurs in all organismsarrow_forwardIn the Calvin cycle, what is the name of the enzyme that attaches a molecule of carbon dioxide to the 5-carbon molecule called ribulose bisphosphate? Glyceraldehyde 3-phosphate Ribulose bisphosphate oxygenase Ribulose bisphosphate carboxylase, also known as RuBisCO 3-PGA carboxylasearrow_forward
- How many G3P molecules are made by one run of the Calvin cycle? Group of answer choices a)3 b)0 c)1 d)4 e)2arrow_forwardThere are some similarities and some differences between the citric acid cycle in the mitochondrion and the Calvin cycle in photosynthesis. Which of the following is NOT a true difference between the two cycles? Both involve CO2, but in the Calvin cycle CO2 is used brought into the process as a source of carbon for the sugar being built. In the Mitochondrion, CO2 is removed from the sugar and leaves the cell. In the Calvin cycle, ATP is used to carry chemical energy from the light reactions to the the Calvin cycle where the chemical energy is incorporated in the sugar molecule that is being manufactured. In the mitochondrion, ATP is produced and brought out of the mitochondrion so it can provide chemical energy to the many activities going on in the cytoplasm The first step in the Calvin cycle, the carboxylation of RuBP, produces a 12-carbon product that splits into two 6 carbon pieces. In the first step of the citric acid…arrow_forwardProducts of the Calvin cycle include: Hide answer choices ADP, Pi, NADP+ ADP, Pi, NADPH NADPH, Pi, G3P ATP, Pi, G3Parrow_forward
- The pentose phosphate pathway is a critical pathway in animals for the production of NADPH and pentose sugars and in many aspects mirrors the Calvin cycle in photosynthesis. Select one: True Falsearrow_forwardWhat are the stages of the Calvin-Benson cycle? Select all that apply. The resulting unstable six-carbon molecule splits into two three-carbon molecules of PGA. ATP and NADPH are used to convert PGA molecules to PGAL. Most of the PGAL is used to regenerate RuBP, but some is exported to the cytoplasm to produce carbohydrates. Rubisco attaches CO2 to a five-carbon organic compound called RuBP. Rubisco is used to convert PGA molecules to PGAL.arrow_forwardWhich of the following are products of the Calvin cycle that are then used as reactants in the light reactions? CO2 Sugar NADP+ O2 ATP NADPH ADP .arrow_forward
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