Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 28, Problem 8R
Describe an example of bioconversion. What
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Biofuels offer an attractive alternative to fuel, but there are concerns about the resources and logistics of producing mass amounts of corn. Which organism is being considered as an alternative source of biofuel? A) cyanobacteria B) Escherichia coli C) yeast D) algae
Metabolic pathways can function efficiently without external control, and will not overproduce unnecessary product molecules because:
a) Large pH shifts speed up reactions
b) Cells release lots of heat to accelerate product formation
c) End products of a pathway cause early enzymes to change shape and inactivate
d) Active sites become saturated as product concentration rises
Refer to the figure. To identify the molecule that accepts CO2, Calvin and Benson manipulated the carbon fixation cycle by either cutting off CO2 or cutting off light from cultures of photosynthetic algae. They then measured the concentrations of various metabolites immediately following the manipulation. How would these experiments help identify the CO2 acceptor?
a) The CO2 acceptor concentration would decrease when either the CO2 or light is cut off.
b)The CO2 acceptor concentration would decrease when the CO2 is cut off but increase when the light is cut off.
c)The CO2 acceptor concentration would stay the same regardless of the CO2 or light.
d)The CO2 acceptor concentration would increase when either the CO2 or light is cut off.
e)The CO2 acceptor concentration would increase when the CO2 is cut off but decrease when the light is cut off.
Chapter 28 Solutions
Microbiology: An Introduction
Ch. 28 - What is industrial microbiology? Why is it...Ch. 28 - How does commercial sterilization differ from...Ch. 28 - Why is a can of blackberries preserved by...Ch. 28 - Outline the steps in the production of cheese, and...Ch. 28 - Beer is made with water, malt, and yeast; hops are...Ch. 28 - Why is a bioreactor better than a large flask for...Ch. 28 - The manufacture of paper includes the use of...Ch. 28 - Describe an example of bioconversion. What...Ch. 28 - Prob. 9RCh. 28 - NAME IT Van Leeuwenhoek was the first to see this...
Ch. 28 - Foods packed in plastic for microwaving are a....Ch. 28 - Acetobacter is necessary for only one of the steps...Ch. 28 - Use the following choices to answer questions 35:...Ch. 28 - The spoilage of canned foods caused by Geobacillus...Ch. 28 - A heat-resistant fungus that causes spoilage in...Ch. 28 - The term 12D treatment refers to a. heat treatment...Ch. 28 - Which one of the following is not a fuel produced...Ch. 28 - Which type of radiation is used to preserve foods?...Ch. 28 - Which of the following reactions is undesirable in...Ch. 28 - Which of the following reactions is an oxidation...Ch. 28 - Which bacteria seem to be most frequently used in...Ch. 28 - Methylophilus methylotrophus can convert methane...Ch. 28 - Faded worn-look denim is produced with cellulase....Ch. 28 - Suppose you are culturing a microorganism that...Ch. 28 - Researchers at the CDC inoculated apple cider with...Ch. 28 - The antibiotic efrotomycin is produced by...
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- Would you describe metabolic pathways as inherently wasteful or inherently economical, and why?arrow_forwardDescribe the following metabolisms (photolithoautotroph, chemolithoautotroph, chemoorganoheterotroph, and photoorganotroph) What is the carbon source for biomass for Autotrophs and Heterotrophs: What is the energy source for Chemotrophs and Phototrophs: What is the electron source for Lithotrophs and Organotrophs:arrow_forwardChoose which of the following reaction pathways is most likely exergonic. Group of answer choices a)glycolysis b)Krebs cycle c)Calvin cycle d)P700 e)P680arrow_forward
- The connection between producers and consumers is that only: A) heterotrophs can perform photosynthesis to produce energy for all life B) autotrophs can use sun energy to u to produce energy for all organisms C) producers use cellular respiration to produce energy for all life D) heterotrophs can perform cellular respiration producing oxygen for all organismsarrow_forwardAnabolic reactions may be characterized as O 1) producing NADPH. O 2) exergonic. 3) breaking large molecules into smaller molecules. O 4) producing FADH. 5) forming large molecules from smaller precursors.arrow_forwardHow many times does the Calvin cycle have to run to make one molecule of glucose? Group of answer choices a)3 b)4 c)the Calvin cycle doesn't make glucose d)2 e)1arrow_forward
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