Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 28.3, Problem 4CC
Summary Introduction
To summarize: How O2 (oxygen) and CO2 (carbon dioxide) are used and produced by the aerobic algae and by the chlorarachniophytes with the help of the figures, Refer Fig.9.2 "Energy flow and chemical recycling in ecosystems", and Fig.10.6 "An overview of photosynthesis: Cooperation of the light reactions and the Calvin cycle” in the textbook.
Concept introduction: Chlorarachniophytes comprises of a small group of the cercozoans. These possess secondary endosymbiosis and are mixotrophic. These organisms ingest small protists and also perform photosynthesis. Aerobic algae also perform the process of photosynthesis and
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Why is an isotonic buffered extraction medium used to isolate the chloroplasts?
1.To gently lyse the chloroplasts, leaving the electron transport membranes intact, whilst allowing DCPIP access
2.To maintain a constant acidic pH and favourable hyper-osmotic conditions, to ensure that the chloroplasts remained intact and functional during extraction
3.To gently separate the chloroplasts from each other, leaving the electron transport membranes intact, whilst allowing DCPIP access
4.To maintain a constant physiological pH and favourable iso-osmotic conditions, to ensure that the chloroplasts remained intact and functional during extraction.
Discuss:
1) the mechanisms that transport photosynthate from sources to sinks. Why is this important on a physiological level and a societal level?
Why is it necessary to lyse the chloroplasts?
1.DCPIP passes easily across the intact chloroplast membrane and the thylakoid membrane, so electron transport could not be reliably measured
2.DCPIP passes easily across the intact chloroplast membrane, but can't get into the thylakoid, so electron transport could not be reliably measured
3.DCPIP cannot easily pass across the intact chloroplast membrane, so electron transport across the thylakoid membrane could not be reliably measured
Chapter 28 Solutions
Campbell Biology (10th Edition)
Ch. 28.1 - Cite at least four examples of structural and...Ch. 28.1 - Summarize the role of endosymbiosis in eukaryotic...Ch. 28.1 - Prob. 3CCCh. 28.2 - Why do some biologists describe the mitochondria...Ch. 28.2 - WHAT IF? DNA sequence data for a diplomonad, a...Ch. 28.3 - Explain why forams have such a well-preserved...Ch. 28.3 - WHAT IF? Would you expect the plastid DNA of...Ch. 28.3 - Prob. 3CCCh. 28.3 - Prob. 4CCCh. 28.4 - Contrast red algae and brown algae.
Ch. 28.4 - Why is it accurate to say that Ulva is truly...Ch. 28.4 - Prob. 3CCCh. 28.5 - Contrast the pseudopodia of amoebozoans and...Ch. 28.5 - Prob. 2CCCh. 28.5 - Prob. 3CCCh. 28.6 - Justify the claim that photosynthetic protists are...Ch. 28.6 - Prob. 2CCCh. 28.6 - WHAT IF? High water temperatures and pollution...Ch. 28.6 - MAKE CONNECTIONS The bacterium Wolbachia is a...Ch. 28 - Describe similarities and differences between...Ch. 28 - What evidence indicates that the excavates form a...Ch. 28 - Prob. 28.3CRCh. 28 - On what basis do systematists place plants in the...Ch. 28 - Describe a key feature for each of the main...Ch. 28 - Prob. 28.6CRCh. 28 - Plastids that are Surrounded by more than two...Ch. 28 - Biologists think that endosymbiosis gave rise to...Ch. 28 - Prob. 3TYUCh. 28 - According to the phylogeny presented in this...Ch. 28 - In a life cycle with alternation of generations,...Ch. 28 - Based on the phylogenetic tree in Figure 28.2,...Ch. 28 - Prob. 7TYUCh. 28 - SCIENTIFIC INQUIRY Applying the If then logic of...Ch. 28 - WRITE ABOUT A THEME: INTERACTIONS Organisms...Ch. 28 - SYNTHESIZE YOUR KNOWLEDGE This micrograph show's a...
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