WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 19, Problem 7MC
Summary Introduction
Introduction:
Nitrogen needs to be fixed by certain types of soil bacteria, to make it available to plants for use.
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Which of the following antimicrobic modes of action would be the most selectively toxic?
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Which of the following statement is INCORRECT?A. Bacteria can decompose organic nitrogen.B. Biological nitrogen fixation is carried out by bacteria.C. Ammonia, ammonium ion and nitrate ion are examples of biological availablenitrogen.D. Denitrifying bacteria converts atmospheric dinitrogen gas into nitrate ion.E. Nitrification is the process of converting reactive nitrogen into another form ofreactive nitrogen.
All of the following are cofactors of SOD (superoxide dismutase) EXCEPT?
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Chapter 19 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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- Why does secondary treatment of wastewater require O2? A. Secondary treatment relies on anaerobic microbes to oxidize organic material. B.Secondary treatment relies on anaerobic microbes to reduce organic material. C.Secondary treatment relies on aerobic microbes to oxidize organic material. D.Photosynthetic bacteria are involved in secondary treatment and they require O2. E. Flocs require oxygen to facilitate biofilm formation.arrow_forward(a) Increasing the number of microorganisms in a composting system through inoculum addition, hastens the decomposition process; (b) The heating of the compost pile up to thermophilic levels destroys weed seeds and kills plant pathogenic microorganisms A. If statement A is true B. if statement B is true C. both statement A and B are true D. statement A nor B are truearrow_forwardWhy is Phenol red being utilized in MacConkey agar? Choose among the choices and further explain it.A. Inhibit microscopic organismsB. Detect the production of gas by-productsC. Conduct the sulfate reduction testD. Detect the acid reaction of lactose fermentationarrow_forward
- Choose the combination of answers that most accurately completes the statement. An important test for identifying Neisseria is a. production of oxidase c. sugar fermentation b. production of catalase d. beta-hemolysisarrow_forward(a) Propose a biosynthetic pathway to the secondary metabolite, B. HO Metabolite Barrow_forwardWhat is the proper term for an organism whose optimum growth range is between 20 and 50C but can grow well at refrigerator temperatures? a. psychrophile b. psychrotroph c. hypophiles d. psychrobotarrow_forward
- An obligate anaerobe A has the necessary enzymes to process toxic oxygen products B does not require oxygen in its metabolism, but can tolerate its presence . C lacks the enzymes necessary for processing toxic oxygen products. D grows in high pressure environments.arrow_forwardA bacterium that lives in the human intestine derives its nutrition by digesting the contents of the intestine. Which mode of nutrition best describes this bacterium? A. aerobic chemoheterotroph B. aerobic chemoautotroph C. anaerobic chemoheterotroph D. anaerobic chemoautotropharrow_forwardDNP is a chemical that inserts proton channels in bacterial plasma membranes. Addition of DNP to obligate aerobes results in _____. Group of answer choices A. growth as a facultative anaerobe B. death of all microbes in the culture C. no effect on microbes that do not use an ETS for anaerobic metabolism D. growth only in anaerobic conditions E. growth only in aerobic conditionsarrow_forward
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