Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 7, Problem 7SQ
Summary Introduction
Introduction:
The photosynthesis are a process in which the green plants and algae obtains their nutrients. This process takes place in chloroplast where chlorophyll molecules are present. The chloroplast contains the thylakoid molecules where light reaction takes place. The end product of the light reaction is the formation of ATP and NADPH which is an energy storing molecules which together helps in driving the Calvin cycle in stroma of chloroplast.
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Which of the following descriptions about photorespiration is not correct?
Select one:
a. Rubisco binds O2 instead of CO2.
b. Carbon dioxide is released without producing ATP.
c. It limits damaging products of light reactions that build up in the absence of the Calvin cycle at low CO2 concentrations.
d. Peroxisomes and mitochondria rearrange and split the compound made by rubisco to fix CO2.
e. It occurs in hot and dry conditions.
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 molecule conveys protons from the chloroplast stroma into the thylakoid lumen?
a. cytochrome b6-f
b. plastocyanin
c. phytochrome
d. cytochrome c
e. oxygen
Chapter 7 Solutions
Campbell Essential Biology with Physiology (6th Edition)
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- Which of the following substances does not participate in the Calvin–Benson cycle? a. ATP d. PGAL b. NADPH e. O2 c. RuBP f. CO2arrow_forwardWhich of the following is not a product of the light reaction? A. Sugar B. NADPH C. ATP D. O2arrow_forwardDuring photosynthesis, ATPS are produced by what process? A. photophosphorylation B. all of the choices C. oxidative phosphorylation D. substrate-level phosphorylationarrow_forward
- 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 productionarrow_forwardWhich 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.arrow_forwardUnder what conditions do the wasteful side reaction of O2 with rubisco become significant? a.) at night when the sun goes down and photosynthesis is limitng b.) low temperatures and high moisture c.) higher levels of soluable CO2 than O2 d.) higher levels of soluable O2 than CO2 e.) higher levels of rubisco enzyme in the cytoplasmarrow_forward
- In which compartment of the chloroplast and mitochondrion does the ATP synthase pump the protons respectively? a. Stroma and matrix b. Lumen and thylakoid membrane c. Lumen and intermembrane space d. Matrix and thylakoid lumenarrow_forwardWhich of the following are the products of the light reactions of photosynthesis. A. Glucose B. Water C. ATP D.NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forwardDuring photosynthesis, ATP is formed and released initially into the a. thylakoid lumen b. thylakoid lamellae c. grana d. stromaarrow_forward
- The role of photosystem 1 and photosystem 2 in the process of photosynthesis is to a. absorb sunlight and distribute the energy as heat b. absorb sunlight and transfer the energy to electrons c. form ATP as hydrogen ions cross the thylakoid membrane d. transfer electrons to form NADPHarrow_forwardWhich of the following are reactants of the light reactions of photosynthesis. A. Glucose B. Water C. ATP D. NADP E. Light energy F. NADPH G. Carbon dioxide H. Oxygenarrow_forwardThe overall process of photosynthesis a. results in the reduction of CO2 and the oxidation of H2O. b. results in the reduction of H2O and the oxidation of CO2. c. consumes O2 and produces CO2. d. produces O2 from CO2.arrow_forward
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Photosynthesis & Respiration | Reactions | Chemistry | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=3XIyweZg6Sw;License: Standard YouTube License, CC-BY