Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 8, Problem 6U
The ATP and NADPH from the light reactions are used
a. in glycolysis in roots.
b. directly in most biochemical reactions in the cell.
c. during the reactions of the Calvin cycle to produce glucose.
d. to synthesize chlorophyll.
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You have discovered a novel peptide that, when administered to plant cells, spontaneously inserts into the thylakoid membranes and forms a channel that lets protons cross the membrane. You treat plant cells growing normally with your peptide. Which of the following statements correctly describes the effect on photosynthesis shortly after the addition of the peptide? Select all that are true.
a.
The rate of Glyceraldehyde 3-phosphate synthesis will decrease
b.
The rate of oxygen production will be unaffected
c.
The rate of Glyceraldehyde 3-phosphate synthesis will increase
d.
The rate of oxygen production will decrease
e.
The rate of oxygen production will increase
f. The rate of Glyceraldehyde 3-phosphate synthesis will be unaffected
Which of the following statements is TRUE?
Select one:
a. The immediate product of the light energy absorbed by the P680 reaction center is used to produce NADPH.
b. In cyclic photophosphorylation, the chlorophyll is reduced by electrons liberated from water molecules.
c. The O2 gas produced during photosynthesis is derived from CO2.
d. In noncyclic photophosphorylation, electrons from water are used directly for the reduction of P700.
e. All of the statements are false.
Which of the following statements is/are FALSE?
a.NADPH is formed in the stroma.
b.The cyclic electron transport involves PSII only.
c.pH gradient can be formed from the splitting of H2O.
d.In the pH gradient, stroma is acidic and thylakoid space is basic.
Chapter 8 Solutions
Biology
Ch. 8 - The light-dependent reactions of photosynthesis...Ch. 8 - Which region of a chloroplast is associated with...Ch. 8 - The colors of light that are most effective for...Ch. 8 - During noncyclic photosynthesis, photosystem I...Ch. 8 - How is a reaction center pigment in a photosystem...Ch. 8 - The ATP and NADPH from the light reactions are...Ch. 8 - The carbon fixation reaction converts a. inorganic...Ch. 8 - C4 plants initially fix carbon by a. the same...Ch. 8 - Prob. 1ACh. 8 - If you could measure pH within a chloroplast,...
Ch. 8 - Prob. 3ACh. 8 - If the Calvin cycle runs through six turns a. all...Ch. 8 - Prob. 5ACh. 8 - Given that the C4 pathway gets around the problems...Ch. 8 - If the thylakoid membrane became leaky to ions,...Ch. 8 - The overall process of photosynthesis a. results...Ch. 8 - Compare and contrast the fixation of carbon in C3,...Ch. 8 - Diagram the relationship between the reactants and...Ch. 8 - Do plant cells need mitochondria? Explain your...
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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
- The ultimate source of energy in our planet is sunlight. In the first stage of photosynthesis, light energy is captured in chlorophyll-containing reaction centers (PSII and PSI). What is the first step in the capture of light energy at PSII? a. The energy carriers ATP and NADPH + H+ are synthesized. b. CO2 reacts with the C5 sugar ribulose-1,5-bis-phosphate in the first step of the Calvin cycle. c. Starch is synthesized. d. H2O is photolyzed and its electrons are captured by special chlorophyll molecules. e. Sucrose is synthesized from glucose and fructose.arrow_forwardWhich of the following is true of light-independent reactions of photosynthesis? Select all that apply. a. Light-independent reactions occur in the stroma. b. Water molecules are split during light-independent reactions. c. Chlorophyll absorbs energy from sunlight. d. Carbon dioxide is necessary for light-independent reactions.arrow_forwardHow 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 respirationarrow_forward
- Which of the following options best explains how less chlorophyll would affect the proces of photosynthesis in plants? 6. A. It would increase the rate of photosynthesis because of the increased production of food. B. It would limit the amount water plants are able to take in, resulting in a slower rate of photosynthesis. C. It would increase the production of oxygen because the plant would need to work hard to feed themselves. С. D. It would limit the amount of light absorbed by the plant and decrease the amount of food the plant is able to produce for itself.arrow_forwardIn the carbon reduction phase of the Calvin cycle, electrons from NADPH are donated to a metabolic intermediate to form G3P molecules. Which statement is NOT true regarding G3P? A. G3P molecules are involved in the regeneration of RuBP. B. G3P molecules affect the activity of the enzyme rubisco. C. G3P molecules have more potential energy than PGA molecules. D. G3P molecules are used to synthesize glucose and other sugars.arrow_forwardWhich of the following processes during photosynthesis is incorrectly coupled to its typical location? Select one: a. Rubisco catalyzes carbon fixation—stroma b. ATP is produced via ATP synthase—thylakoid lumen c. NADPH is oxidized to NADP+—stroma d. Oxygen gas is produced by splitting of water—thylakoid lumen e. Activated P680 donates an electron to the primary electron acceptor—thylakoid membranesarrow_forward
- The first step of the light reactions is the transfer (powered by solar energy) of an electron to the primary electron acceptor within photosystem proteins of the: a. Thylakoid membrane b. Intermembrane space of a chloroplast c. Stroma of a chloroplast d. Cell membrane of a mesophyll cellarrow_forwardWhich of the following statements about the Calvin-Benson cycle is TRUE? Select one: a. Blocking light causes 3PG to accumulate. b. All the statements are false. c. Rubisco catalyzes the formation of RuBP. d. ATP and NADPH + H+ are required to regenerate RuBP. e. More molecules of NADPH than ATP are required per cycle.arrow_forwardIf an enzyme in the Calvin cycle were knocked out, then a the light-dependent reactions would increase. b the light-dependent reactions would stop. c the light-dependent reactions would diminish. d the light-dependent reactions would be unaffected.arrow_forward
- During oxygenic photosynthesis in plants, the hydrogen atoms that end up in product carbohydratemolecules are coming from which of the following substrate molecules?A. water molecules (H2O)B. sucrose sugars (C12H22O11)C. carbon monoxide (CO)D. glucose sugars (C6H12O6)E. carbon dioxide (CO2)arrow_forwardIdentify which of the following statements is a lie? Select one: a. ATP is produced in dark reactions. b. Carbon fixation does not need light. c. Plant utilize carbon dioxide in order to produce oxygen.arrow_forwardDuring the light-dependent reactions the high energy electron from P680. Select one: a. moves to Photosystem I b. becomes incorporated into water molecules c. is used to fix carbon dioxide d. is pumped into the thylakoid space e. reduces FADarrow_forward
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