Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 30, Problem 4TY
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. A microbiome can be found in a living system or in a physical system.
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which of the following is not a way that normal microbial prevent growth of competing microbes?
a. production of substances harmful to competitors
b. more efficient utilization of nutrients
c. changing pH of environment
d. all of the above are used by normal microbiota against competitors
e. none of the above are utilized by normal microbiota
which of the following is a result of colonization by mutualistic and commensal microbes? (multiple answers)
a. the human microbiomes
b. the gut microbiota
c. gut dysbiosis
d. enterotypes.
E. A C. difficile infection.
Which of the following is a noncommunicable infectious disease?
O a. infection acquired from the stick of a contaminated needle
O b. skin infection acquired from a dog bite
O. infection with a respiratory virus
O d. food poisoning due to a preformed bacterial toxin in food
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- 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_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_forwardWhich of the following statements is correct? a. Serial interval is the length of time a person can transmit or shed an infectious agent b. Contamination of the drinking water source of a community by infectious agent(s) will likely result in a continuous common source epidemic c. It is not possible for people who have not shown symptoms of measles yet, to transmit measles infection d. Mary Mallon was a chronic carrier of Vibrio choleraearrow_forward
- Which 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_forwardWhen a baby is born, the first exposure to microbiota is through all of the following EXCEPT a. the baby acquires the residential microbiota in the colon after the first meal b. Microbes enter the nose and mouth when the baby is in the birth canal c. Staphylococcus epidermidis is transferred from the hospital staff to the newborn after delivery d. Microorganisms grow in the respiratory tract after the baby's first breath e. Microbes cross the placenta during pregnancyarrow_forwardThe term active transmission refers to: a. A person who catches a disease from a bug bite b. A person who catches a disease from contaminated food c. A person who catches a disease from a contaminated object d. A person who coughs in public and passes the disease to those around themarrow_forward
- A(n) _______ organism is part of the normal microbial flora of the host A. Acquired B. Symbiotic C. Commensal D. Secondaryarrow_forwardAn area of microbiology that is concerned with the occurrence of disease in human populations is a. immunology b. parasitology c. epidemiology d. bioremediationarrow_forwardA bacterium which normally lives in the human body without causing any harm, but when circumstances are right they may cause disease is known as .... O a. Parasitic O b. Exotoxin producer O c. Invader O d. Endotoxin producer e. Opportunisticarrow_forward
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