Which of these best describes the action of the Calvin Cycle? a. b. C. d. It uses CO₂ from the atmosphere, and ATP and NADPH from the light-dependent reactions. It takes six cycles to reform RuBP, and three cycles to produce glucose. It can take place only in darkness. One molecule of carbon dioxide is fixed in three cycles.

Which of these best describes the action of the Calvin Cycle? a. b. C. d. It uses CO₂ from the atmosphere, and ATP and NADPH from the light-dependent reactions. It takes six cycles to reform RuBP, and three cycles to produce glucose. It can take place only in darkness. One molecule of carbon dioxide is fixed in three cycles.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter6: Where It Starts-photosynthesis

Section: Chapter Questions

Problem 15SA: Match each term with its most suitable description. ____ PGAL formation a. absorbs light ____CO2...

See similar textbooks

Similar questions

Which part of the Calvin cycle would be affected if a cell could not produce the enzyme RuBIsCO?
Explain the reciprocal nature of the net chemical reactions for photosynthesis and respiration.
Match 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 function
Photosynthesis directly opposes respiration in determining how plants influence atmospheric CO2 concentrations. When a leaf is in the light, both photosynthesis and respiration are occurring simultaneously. The data in the Table were collected from the leaf of a sagebrush plant that was enclosed in a chamber that measures the rate of CO2 exchange. The same leaf was used to collect the data in Interpret the Data in Chapter 7. Respiration is shown as a negative and photosynthesis as a positive rate of CO2 exchange. The net photosynthesis rate is the amount of CO2 (in micromoles per square meter per second) assimilated by the leaf while respiration is occurring; a positive value indicates more photosynthesis is occurring than respiration. The light exposed to the leaf is quantified as the number of photons in the 400 to 700 nm wavelength, the photosynthetic photon flux density (PPFD); 2,000 mol/m2/s is equivalent to the amount of light occurring at midday in full Sun. Observation Photosynthetic Photon Flux Density (PPFD) (mol/m2/s) Net Photosynthesis (mol/m2/s) 1 2,000 9.1 2 1,500 8.4 3 1,250 8.2 4 1,000 7.4 5 750 6.3 6 500 4.8 7 250 2.2 8 0 -2.0 Why is net photosynthesis negative when PPFD is zero? Looking at the respiration data from Interpret the Data in Chapter 7, at what temperature do you think these data were collected? Source: Data based on unpublished research by Brent Ewers, University of Wyoming.
In ________, electrons that have been energized by light contribute their energy to add phosphate to ADP, producing ATP. (a) crassulacean acid metabolism (b) the Calvin cycle (c) photorespiration (d) C4 pathways (e) photophosphorylation
Which of the following pathways requires molecular oxygen (O2)? a. aerobic respiration b. lactate formation c. alcoholic fermentation d. photosynthesis
The Calvin-Benson cycle starts with _______. a. the absorption of photon energy b. carbon fixation c. the release of electrons from photosystem II d. NADP+ formation
28. What happens during the carbon fixation of the Calvin Cycle? Group of answer choices A. The enzyme Rubisco attaches to CO2 to RuBP causing the formation of molecules of 3-phosphoglycerate. B. Energy from ATP and electron from NADPH are used to reduce 3-phosphoglycerate to form G3P molecules (which can be used to form other organic molecules such as glucose). C. Oxygen is produced through this process. D. The remaining G3P molecules that have not exited the cycle are used to re-from RUBP through a series of chemical reactions so that the Calvin Cycle can continue.
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.
18. Choose the INCORRECT statement about Calvin cycle: A. is an example of a catabolic process. B. it produces GTP. C. it begins with carbon fixation. D. it regenerate RUBP E. it utilizes NADPH and ATP
How would placing a plant in complete darkness affect the Calvin cycle? A It would inhibit the reaction because light photons are required to convert 3-phosphoglycerate (3-PGA) to glyceraldehyde 3-phosphate (G3P) B C) The Calvin cycle would not be able to supply energy to power the light reactions D The light reactions would not be able to supply energy to power the Calvin cycle E A different type of sugar is produced It stops respiration
Which of the following statements about the light reactions of photosynthesis are correct? 1. Absorption of light does one thing: it makes chlorophyll easier to oxidize. 2. In PSII, the rate of damage to the D1 protein can never exceeds the rate of repair. 3. Electron transport is spontaneous (exergonic) as electrons move from P680* to P700+. 4. Compared to anoxygenic photosynthesis, in oxygenic photosynthesis less light needs to be absorbed to reduce NADP+. 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