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19 Sep 2024, 21:34
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A new era in medical science has dawned with the realization of the critical role of the “forgotten organ” - the gut microbiota, in health and disease. Microbiota refers to the community of microorganisms, including bacteria, viruses, and fungi, that inhabit a particular environment, such as the human gut. Central to this beneficial interaction between the microbiota and host is the manner in which bacteria and most likely other microorganisms contained within the gut communicate with the host’s immune system and participate in a variety of metabolic processes of mutual benefit to the host and the microbe.
At birth, the entire intestinal tract is sterile; the infant’s gut is first colonized by maternal and environmental bacteria during birth and continues to be populated through feeding and other contacts. By the end of the first year of life, the microbial profile is distinct for each infant; by the age of 2.5 years, the microbiota fully resembles the microbiota of an adult in terms of composition.
Following infancy, the composition of the intestinal microflora remains relatively constant until later life. It has been claimed that the composition of each individual’s flora is so distinctive that it could be used as an alternative to fingerprinting. The microbiota is thought to remain stable until old age when changes are seen, possibly related to alterations in digestive physiology and diet.
In humans, the composition of the microbiota is influenced not only by age but also by diet and socioeconomic conditions. In a recent study of elderly individuals, the interaction of diet and age was demonstrated, firstly, by a close relationship between diet and microbiota composition in the subjects and, secondly, by interactions between diet, the microbiota, and health status.
Antibiotics, whether prescribed or in the food chain as a result of their administration to animals, have the potential to profoundly impact the microbiota. In the past, it was thought that these effects were relatively transient, with complete recovery of the microbiota occurring very soon after the course of antibiotic therapy was complete. However, while recent studies have confirmed that recovery is fairly rapid for many species, some species and strains show more sustained effects.
If researchers were to find a significant change in the microbiota of a middle-aged individual, how would this finding relate to the passage?
A. It would confirm that microbiota composition is constantly changing throughout life.
B. It would contradict the passage’s assertion that the microbiota remains stable from 2.5 years until old age.
C. It would support the passage’s claim about diet and socioeconomic conditions influencing microbiota.
D. It would provide evidence that antibiotics permanently alter microbiota composition.
E. It would demonstrate that the microbiota resembles its early childhood form by middle age.
At birth, the entire intestinal tract is sterile; the infant’s gut is first colonized by maternal and environmental bacteria during birth and continues to be populated through feeding and other contacts. By the end of the first year of life, the microbial profile is distinct for each infant; by the age of 2.5 years, the microbiota fully resembles the microbiota of an adult in terms of composition.
Following infancy, the composition of the intestinal microflora remains relatively constant until later life. It has been claimed that the composition of each individual’s flora is so distinctive that it could be used as an alternative to fingerprinting. The microbiota is thought to remain stable until old age when changes are seen, possibly related to alterations in digestive physiology and diet.
In humans, the composition of the microbiota is influenced not only by age but also by diet and socioeconomic conditions. In a recent study of elderly individuals, the interaction of diet and age was demonstrated, firstly, by a close relationship between diet and microbiota composition in the subjects and, secondly, by interactions between diet, the microbiota, and health status.
Antibiotics, whether prescribed or in the food chain as a result of their administration to animals, have the potential to profoundly impact the microbiota. In the past, it was thought that these effects were relatively transient, with complete recovery of the microbiota occurring very soon after the course of antibiotic therapy was complete. However, while recent studies have confirmed that recovery is fairly rapid for many species, some species and strains show more sustained effects.
If researchers were to find a significant change in the microbiota of a middle-aged individual, how would this finding relate to the passage?
A. It would confirm that microbiota composition is constantly changing throughout life.
B. It would contradict the passage’s assertion that the microbiota remains stable from 2.5 years until old age.
C. It would support the passage’s claim about diet and socioeconomic conditions influencing microbiota.
D. It would provide evidence that antibiotics permanently alter microbiota composition.
E. It would demonstrate that the microbiota resembles its early childhood form by middle age.
19 Sep 2024, 21:34
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Official Solution:
A new era in medical science has dawned with the realization of the critical role of the “forgotten organ” - the gut microbiota, in health and disease. Microbiota refers to the community of microorganisms, including bacteria, viruses, and fungi, that inhabit a particular environment, such as the human gut. Central to this beneficial interaction between the microbiota and host is the manner in which bacteria and most likely other microorganisms contained within the gut communicate with the host’s immune system and participate in a variety of metabolic processes of mutual benefit to the host and the microbe.
At birth, the entire intestinal tract is sterile; the infant’s gut is first colonized by maternal and environmental bacteria during birth and continues to be populated through feeding and other contacts. By the end of the first year of life, the microbial profile is distinct for each infant; by the age of 2.5 years, the microbiota fully resembles the microbiota of an adult in terms of composition.
Following infancy, the composition of the intestinal microflora remains relatively constant until later life. It has been claimed that the composition of each individual’s flora is so distinctive that it could be used as an alternative to fingerprinting. The microbiota is thought to remain stable until old age when changes are seen, possibly related to alterations in digestive physiology and diet.
In humans, the composition of the microbiota is influenced not only by age but also by diet and socioeconomic conditions. In a recent study of elderly individuals, the interaction of diet and age was demonstrated, firstly, by a close relationship between diet and microbiota composition in the subjects and, secondly, by interactions between diet, the microbiota, and health status.
Antibiotics, whether prescribed or in the food chain as a result of their administration to animals, have the potential to profoundly impact the microbiota. In the past, it was thought that these effects were relatively transient, with complete recovery of the microbiota occurring very soon after the course of antibiotic therapy was complete. However, while recent studies have confirmed that recovery is fairly rapid for many species, some species and strains show more sustained effects.
If researchers were to find a significant change in the microbiota of a middle-aged individual, how would this finding relate to the passage?
A. It would confirm that microbiota composition is constantly changing throughout life.
B. It would contradict the passage’s assertion that the microbiota remains stable from 2.5 years until old age.
C. It would support the passage’s claim about diet and socioeconomic conditions influencing microbiota.
D. It would provide evidence that antibiotics permanently alter microbiota composition.
E. It would demonstrate that the microbiota resembles its early childhood form by middle age.
A. Incorrect. This option is incorrect because the passage asserts that the microbiota remains relatively stable after early childhood and only changes significantly in old age. While diet and other factors can influence microbiota, the passage does not suggest that the composition is constantly changing throughout life.
B. Correct Answer. The passage states that microbiota composition remains stable after infancy until old age. Finding a significant change in middle-aged individuals would contradict this claim.
C. Incorrect. This option is tempting because the passage mentions that diet and socioeconomic conditions can influence microbiota. However, the passage still maintains that microbiota remains stable until old age, so this discovery would contradict that, not support it.
D. Incorrect. This option is irrelevant to the question. The passage mentions antibiotics as one factor that influences microbiota, but the question is about age-related changes, not the impact of antibiotics.
E. Incorrect. This option misinterprets the passage. The passage does not suggest that microbiota returns to its early childhood form at any point in adulthood. Instead, it emphasizes that microbiota stabilizes after infancy and remains so until old age.
Answer: B
A new era in medical science has dawned with the realization of the critical role of the “forgotten organ” - the gut microbiota, in health and disease. Microbiota refers to the community of microorganisms, including bacteria, viruses, and fungi, that inhabit a particular environment, such as the human gut. Central to this beneficial interaction between the microbiota and host is the manner in which bacteria and most likely other microorganisms contained within the gut communicate with the host’s immune system and participate in a variety of metabolic processes of mutual benefit to the host and the microbe.
At birth, the entire intestinal tract is sterile; the infant’s gut is first colonized by maternal and environmental bacteria during birth and continues to be populated through feeding and other contacts. By the end of the first year of life, the microbial profile is distinct for each infant; by the age of 2.5 years, the microbiota fully resembles the microbiota of an adult in terms of composition.
Following infancy, the composition of the intestinal microflora remains relatively constant until later life. It has been claimed that the composition of each individual’s flora is so distinctive that it could be used as an alternative to fingerprinting. The microbiota is thought to remain stable until old age when changes are seen, possibly related to alterations in digestive physiology and diet.
In humans, the composition of the microbiota is influenced not only by age but also by diet and socioeconomic conditions. In a recent study of elderly individuals, the interaction of diet and age was demonstrated, firstly, by a close relationship between diet and microbiota composition in the subjects and, secondly, by interactions between diet, the microbiota, and health status.
Antibiotics, whether prescribed or in the food chain as a result of their administration to animals, have the potential to profoundly impact the microbiota. In the past, it was thought that these effects were relatively transient, with complete recovery of the microbiota occurring very soon after the course of antibiotic therapy was complete. However, while recent studies have confirmed that recovery is fairly rapid for many species, some species and strains show more sustained effects.
If researchers were to find a significant change in the microbiota of a middle-aged individual, how would this finding relate to the passage?
A. It would confirm that microbiota composition is constantly changing throughout life.
B. It would contradict the passage’s assertion that the microbiota remains stable from 2.5 years until old age.
C. It would support the passage’s claim about diet and socioeconomic conditions influencing microbiota.
D. It would provide evidence that antibiotics permanently alter microbiota composition.
E. It would demonstrate that the microbiota resembles its early childhood form by middle age.
A. Incorrect. This option is incorrect because the passage asserts that the microbiota remains relatively stable after early childhood and only changes significantly in old age. While diet and other factors can influence microbiota, the passage does not suggest that the composition is constantly changing throughout life.
B. Correct Answer. The passage states that microbiota composition remains stable after infancy until old age. Finding a significant change in middle-aged individuals would contradict this claim.
C. Incorrect. This option is tempting because the passage mentions that diet and socioeconomic conditions can influence microbiota. However, the passage still maintains that microbiota remains stable until old age, so this discovery would contradict that, not support it.
D. Incorrect. This option is irrelevant to the question. The passage mentions antibiotics as one factor that influences microbiota, but the question is about age-related changes, not the impact of antibiotics.
E. Incorrect. This option misinterprets the passage. The passage does not suggest that microbiota returns to its early childhood form at any point in adulthood. Instead, it emphasizes that microbiota stabilizes after infancy and remains so until old age.
Answer: B
hitesharyan
31 Dec 2024, 00:25
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I agree with reasoning however I got confused with the wording of the question- significant change in individuals. I perceived it as each individual has a different microbiota which is alluded in the passage.
