Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Textbook Question
Chapter 11.12, Problem 1CC
Define the following terms: light reactions, dark reactions, chlorophyll, carotenoid, phycobiliprotein, antenna, and photosystems I and II.
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Photosystems are essential to the light reactions. Which of the following is true about photosystems?
a) Photosystems are embedded within membranes, across which they create a proton gradient.
b) Photosystems work together to absorb light over a larger surface area than could be possible from just one pigment molecule working alone.
c) Photosystems are composed of proteins and pigment molecules.
d) All of the above
Outline the process of light dependent reactions capturing and converting light energy for photosynthesis.
List and describe the five stages of the light-dependent reactions.
Chapter 11 Solutions
Prescott's Microbiology
Ch. 11.1 - Prob. 1CCCh. 11.1 - Retrieve, Infer, Apply Compare...Ch. 11.1 - Retrieve, Infer, Apply What are the three major...Ch. 11.2 - Is NAD+ reduced to NADH in the catabolic or...Ch. 11.2 - Prob. 1CCCh. 11.2 - Why is it to a cells advantage to catabolize...Ch. 11.2 - Prob. 3CCCh. 11.4 - Which reactions are examples of substrate-level...Ch. 11.4 - For what kinds of reactions is NADPH used?Ch. 11.4 - For what macromolecule is ribose 5-phosphate a...
Ch. 11.4 - Summarize the major features of the...Ch. 11.4 - Prob. 2CCCh. 11.5 - Identify the substrate and products of the TCA...Ch. 11.5 - What chemical intermediate links pyruvate to the...Ch. 11.5 - Prob. 3CCCh. 11.5 - Retrieve, Infer, Apply In what eukaryotic...Ch. 11.5 - Why is it desirable for a microbe with the...Ch. 11.6 - Prob. 1MICh. 11.6 - Prob. 2MICh. 11.6 - Describe the current model of oxidative...Ch. 11.6 - Prob. 3CCCh. 11.6 - Prob. 4CCCh. 11.7 - Prob. 1CCCh. 11.7 - Prob. 2CCCh. 11.7 - Prob. 3CCCh. 11.8 - Prob. 1MICh. 11.8 - Prob. 1CCCh. 11.8 - Prob. 2CCCh. 11.8 - Prob. 3CCCh. 11.8 - Prob. 4CCCh. 11.8 - Prob. 5CCCh. 11.9 - What is the difference between a hydrolase and...Ch. 11.9 - Prob. 2MICh. 11.9 - Retrieve, Infer, Apply Briefly discuss the ways in...Ch. 11.9 - Prob. 2CCCh. 11.9 - Retrieve, Infer, Apply Describe how a...Ch. 11.11 - How do chemolithotrophs obtain their ATP and...Ch. 11.11 - Prob. 2CCCh. 11.11 - Why can hydrogen-oxidizing bacteria and archaea...Ch. 11.11 - What is reverse electron flow and why do many...Ch. 11.11 - Prob. 5CCCh. 11.12 - When electrons from P700 are used to reduce NADP+,...Ch. 11.12 - Define the following terms: light reactions, dark...Ch. 11.12 - Prob. 2CCCh. 11.12 - What is the function of accessory pigments?Ch. 11.12 - Prob. 4CCCh. 11.12 - Compare and contrast anoxygenic phototrophy and...Ch. 11.12 - Prob. 6CCCh. 11 - Prob. 1RCCh. 11 - Prob. 2RCCh. 11 - Prob. 3RCCh. 11 - Prob. 4RCCh. 11 - Prob. 5RCCh. 11 - Prob. 6RCCh. 11 - How would you isolate a thermophilic...Ch. 11 - Certain chemicals block ATP synthesis by allowing...Ch. 11 - Prob. 3ALCh. 11 - Review the description of the Berkeley Pit Lake in...Ch. 11 - Prob. 5AL
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- Describe the role of chlorophylls, bacteriochlorophylls, accessory pigments, reaction-center pigments, and antennae pigments in capturing radiant energy.arrow_forwardWhich of the following is in the correct order from smallest to largest? Thylakoid disk, Photosystem I, mesophyll cell, chloroplast, leaf Photosystem II, Chloroplast, thylakoid disk, mesophyll cell, leaf Thylakoid disk, Photosystem II, chloroplast, mesophyll cell, leaf Photosystem II, Thylakoid disk, chloroplast, mesophyll cell, leafarrow_forwardDescribe the main events in the light-independent reactions and the products that result.arrow_forward
- DRAW a curved arrow mechanism for photosynthesis with the following steps. Step 1: Absorption of sunlight and excitation of chlorophyll molecules Step 2: Transfer of energy to reaction center chlorophylls, which lose an electron and become oxidized. Step 3: Electron transfer from oxidized chlorophylls to an electron acceptor, such as a quinone molecule Step 4: Electron transfer from the quinone molecule to a chain of electron carriers, such as cytochromes, which generate a proton gradient across the thylakoid membrane Step 5: ATP synthesis by ATP synthase using the energy of the proton gradient. Step 6: Transfer of electrons from the electron carriers to the enzyme rubisco, which catalyzes the carboxylation of ribulose bisphosphate (RuBP) with CO2, forming an unstable 6-carbon intermediate. Step 7: Cleavage of the 6-carbon intermediate into two 3-carbon molecules, which are phosphorylated by ATP and reduced by NADPH to form glyceraldehyde-3-phosphate (G3P) Step 8: Conversion of G3P to…arrow_forwardSummarize the starting and ending products for each step in the light-dependent reactions: Photosystem II Electron Transport Chain Photosystem Iarrow_forwardChlorophyll a and chlorophyll b both play roles in photosynthesis. Using no more than one sentence to respond for each segment, please: 1) Outline the roles/functions that chlorophyll b play that are different from those for chlorophyll a 2) Outline the roles/functions that chlorophyll a play that are different from those for chlorophyll barrow_forward
- You are cleaning your room and accidentally move your plant into the closet and forget about it for one week. a) Which molecules are not produced in the plant if light is not present? What effect do these molecules have on photosynthesis? b) Explain the effect of leaving the plant in darkness for one week on cellular respiration.arrow_forwardWhich of the following best describes the products of the photochemical reactions of photosynthesis?A) NADH and ATP are made in the stromaB) NADPH and ATP are made in the stromaC) NADH and ATP are made in the thylakoid lumenD) NADPH is made in the stroma and ATP is made in the thylakoid lumenE) NADPH and ATP are made in the thylakoid lumenarrow_forwardList a class of accessory photosynthetic pigments.arrow_forward
- What is a photosystem? Please explain in 1-3 sentences onlyarrow_forwardChlorophyll is the green pigment found in plants. Which of the following statements can be implied regarding chlorophyll? O Chlorophyll does not absorb in the UV region. O Chlorophyll is made up of only C- H, C- C, C- N and C-O single bonds. O Chlorophyll uses the blue and red colors for photosynthesis. O Chlorophyll uses the green color for photosynthesis.arrow_forwardWhich of the following correctly sequences the steps of non-cyclic electron transport? a) Chlorophyll molecules absorb UV radiation exciting electrons which flow through photosystem I, returning to the chlorophyll molecules b) Electrons donated from water molecules pass through photosystem I then photosystem II before returning to the chlorophyll molecules, generating ATP in the process c) Water is oxidized by the capture of light energy; these excited electrons are passed through the dark reactions, returning to chlorophyll during the final light reactions d) The ATP and NADPH generated by the reactions of photosystem II and photosystem I are utilized by the Calvin Cycle to build high energy glucose moleculesarrow_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