Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 30, Problem 2TY
Summary Introduction
Introduction: A microbiome is an environment in which many species of microbes with their genes are assembled together to benefit the particular organism. Microbiome is not only limited to the human body but it is also present in other animals and plants..
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which of the following is not a way that normal microbial prevent growth of competing microbes?
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following statements is incorrect? a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms. b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms. c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body. d. It is common for commensal bacteria to live in symbiosis with their human hosts. e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.arrow_forwardwhich of the following definitions is not technically correct? a. broad spectrum - effective against many different types of microbes b. bacteriostatic - prevents microbes from growing c. antibiotic - microbial or synthetic product that kills or inhibits growth of microbes. d. all of the above are correctarrow_forwardNormal microbiota: A. are only found in the digestive tract. B. protect us from disease by crowding out "bad" invading bacteria. C.are only found on small select parts of our bodies. D.always cause disease when growing on our bodies. E.play no role in our general health.arrow_forward
- Which of the following statements correctly describes exotoxins and endotoxins produced by various bacteria? A. endotoxins are secreted into the environment while the bacteria are still alive B. exotoxins are secreted into the environment while the bacteria are still alive C. exotoxins are only released into the environment when the bacteria die and their cell walls break down D. exotoxins are components of the outer membrane of the bacteria that produce themarrow_forwardWhich of the following pairs id mismatched? A. Virologist – studies human immunodeficiency virus B. Microbial ecologist – studies bacteria that degrade oil C. Microbial physiologist – studies fermentation of sourdough bread D. Immunologist – studies ecology of Legionella pneumophilia Which of the following pairs is mismatched? A. Chemotheraphy – treatment of disease B. Pathogen – disease causing C. Vaccine - preparation of microorganisms D. Normal microbiota – harmfularrow_forwardThe first step for directly linking a microbe to a specific disease according to Koch's postulates is to A.isolate microbes from the blood of healthy animals. B. culture the blood or other body fluid from a diseased animal using nutrient medium. C. inject a sample of blood or other body fluid from a diseased animal into a healthy animal. D. obtain a sample of blood or other body fluid from a diseased animal.arrow_forward
- an agent that is bacteriostatic: a. kills algae b. kills bacteria c. inhibits the growth of fungi d. inhibits the growth of bacteriaarrow_forwardDuring this outbreak, some people sickened with listeriosis testedpositive for Listeria monocytogenes in their bloodstream, but a DNAprofile of the bacterium showed that it was not the outbreak strain.What likely conclusion can be drawn from this information?a. It is a false positive. b. The person is not part of the outbreak.c. Listeria monocytogenes mutates frequently, making DNAprofiling unreliable.d. The person has already begun to recover from the disease.arrow_forwardWhich type(s) of microbes could we expect to mind on our skin a. Transient microbiota b. Normal microbiota c. Opportunistic pathogens d. None of the above e. All of the abovearrow_forward
- Which of the following describes "incubation period"? a. It is the time interval between entry of an infectious agent into the body and the appearence of the first symptoms and/or signs of the disease b. It is the time after recovery when a person can still harbor the infection c. It is the time interval through which an infected person is able to transmit the infectious agent to others d. It is the time interval between the onset of primary and secondary casesarrow_forwardAn infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure itarrow_forwardWhat part of an animal USUALLY do not have microbes? A. Teeth B.Genitalia C. Lungs D. Gastrointestinal tractarrow_forward
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