BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
2020th Edition
ISBN: 9780135686553
Author: Audesirk
Publisher: PEARSON
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Chapter 7, Problem 3FTB
During the first stage of photosynthesis, light is captured and funneled into ____ chlorophyll a molecules. The energized electron is then passed into a(n) ___. From here, it is transferred through a series of molecules called the _____. Energy lost during these transfers is used to create a gradient of _____. The process that uses this gradient to generate ATP is called ____.
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Which of the following changes would decrease ATP production in the light-dependent reactions of photosynthesis?
a.
decreasing the pH of the thylakoid lumen
b.
decreasing the pH of the chloroplast stroma
c.
increasing the concentration of NADP+ in the chloroplast stroma
d.
making the thylakoid membrane freely permeable to protons by adding a proton channel
e.
two of the above would decrease ATP production
When a photon is absorbed by a chlorophyll, the energy of the photon is transferred to an electron, which is energized from its ground state to an excited state. This event in photosynthesis is specifically called __________.
Which 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.
Chapter 7 Solutions
BIOLOGY: LIFE ON EARTH-W/MASTERING ACCE
Ch. 7 - Which of the following is True? a. Photosynthesis...Ch. 7 - The Calvin cycle a. can only occur when light is...Ch. 7 - Prob. 3MCCh. 7 - Carotenoids a. include chlorophylls a and b. b....Ch. 7 - Prob. 5MCCh. 7 - Plant leaves contain pores called _____ that allow...Ch. 7 - Chlorophyll a captures wavelengths of light that...Ch. 7 - 3. During the first stage of photosynthesis, light...Ch. 7 - The oxygen produced as a by-product of...Ch. 7 - 5. In plants, the enzyme that catalyzes carbon...
Ch. 7 - Light reactions generate the energy-carrier...Ch. 7 - Prob. 1RQCh. 7 - Prob. 2RQCh. 7 - 3. Draw a simplified diagram of a leaf...Ch. 7 -
4. Draw a simplified diagram of a chloroplast and...Ch. 7 - Explain photorespiration and why it occurs....Ch. 7 - Trace the flow of energy in chloroplasts from...Ch. 7 - 7. Summarize the events of the Calvin cycle. Where...Ch. 7 - Suppose an experiment is performed in which plant...Ch. 7 - If you were to measure the pH in the space...Ch. 7 - 3. Assume you want to add an accessory pigment to...
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- Figure 8.18 Which of the following statements is true? In photosynthesis, oxygen, carbon dioxide, ATP, and NADPH are reactants. G3P and water are products. In photosynthesis, chlorophyll, water, and carbon dioxide are reactants. G3P and oxygen are products. In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants. RuBP and oxygen are products. In photosynthesis, water and carbon dioxide are reactants. G3P and oxygen are products.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 of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2arrow_forward
- Match the step or structure in which each happens during Photosynthesis: A. Step where the water is split ? Goup choose : Light Dependant - Chlorphyll - Chloroplast - Precursor to Glucose -Calvin Cycle - Oxygen B. Result of splitting water that doesn’t move to next step? Goup choose : Light Dependant - Chlorphyll - Chloroplast - Precursor to Glucose -Calvin Cycle - Oxygen C. Organelle where Photosynthesis occurs? Goup choose : Light Dependant - Chlorphyll - Chloroplast - Precursor to Glucose -Calvin Cycle - Oxygen D. Site of sunlight absorption that excites electrons ? Goup choose : Light Dependant - Chlorphyll - Chloroplast - Precursor to Glucose -Calvin Cycle - Oxygen E. Step where Carbon Dioxide is pulled together ? Goup choose : Light Dependant - Chlorphyll - Chloroplast - Precursor to Glucose -Calvin Cycle - Oxygen F. Product of Carbon Dioxide being pulled together? Goup choose : Light…arrow_forwardHow is the proton gradient of H+ generated in chloroplasts during photosynthesis? A. Light splits water molecules in the stroma, causing the release of protons. B. Protons are pumped across the thylakoid membrane using energy from ATP. C. Light causes protons to flow through protein channels in the thylakoid membrane. D. The flow of electrons from carrier to carrier in the thylakoid membrane causes the pumping of protons.arrow_forwardWhich of the following events happens during the Calvin Cycle stage of photosynthesis? A. H2O is split to produce oxygen. B. NADPH and ATP are produced. C. Carbon is fixed from CO2 into RuBP. D. Transfer of electrons from carrier to carrier.arrow_forward
- Which of the following are inputs to photosynthesis? Choose all that apply. Which are outputs? Choose all that apply. a. CO2 b. O2 c. sugar d. H2O e. lightarrow_forwardWhich of the following is true of chloroplastic ATP: Select one: a. it is made in the Calvin cycle and consumed in the light reactions b. it is used during photosynthesis, S assimilation, and N assimilation c. it does not leave the chloroplast, and is used to breakdown molecules d. it is made during photosynthesis and S assimilation e. it leaves the chloroplast, and is consumed in respiration and N assimilationarrow_forwardWhich of the following is not a product of the light reactions in photosynthesis? a. O2 b. NADPH c. H2O d. ATParrow_forward
- Which of the following occurs during the carbon-fixation reactions of photosynthesis? A. Water is converted into hydrogen and water. B. CO2 is converted into sugars. C. Chlorophyll acts as an enzyme. D. Nothing occurs; the plant rests in the dark. E. Glucose and oxygen are reduced to CO2 and water.arrow_forwardThe graph here shows the change in energy level for the reactants and the products of photosynthesis. Given the energy levels modeled in the graph, which statement accurately compares the energy of the products and the reactants with regards to photosynthesis? A. Water and Oxygen have the highest energy compared to glucose and and carbon dioxide B. Glucose and Oxygen gas have higher energy levels compared to water and carbon dioxide C. Glucose and water have the same energy levels compared to carbon dioxide and oxygen gas D. Glucose and oxygen have a lower energy energy level associated with them compared to carbon dioxide and waterarrow_forwardIf ribulose bisphosphate were removed from a chloroplast, which of the following statements would BEST describe the immediate result? b)ATP could not be produced in the thylakoid a) CO2 could not enter the Calvin cycle d) Light energy could not be trapped in the grana c) 02 could not enter the Calvin Cyclearrow_forward
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