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07 Jan 2024, 15:58
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Dr. Helen Purdy Beale, a pioneering virologist, made a groundbreaking discovery about the Tobacco Mosaic Virus (TMV). TMV, known for causing disease in tobacco plants, forms distinctive patterns of mottling and discoloration on the leaves. Dr. Beale's work, initially met with skepticism, has been validated by later research and significantly advanced our understanding of viral structures and plant pathology.
Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time. Her studies revealed that these helical structures are critical for the virus's ability to infect and replicate within plant cells. She postulated that the helical form allows the virus to interact more effectively with the host cell's mechanisms, facilitating the spread of the infection through the plant's vascular system.
Most notably, Dr. Beale suggested that the helical structure of TMV played a role in the specific symptoms exhibited by infected plants. She observed that the virus's form influenced how it moved and spread within the plant tissues, leading to the characteristic patterns of discoloration. While many scientists focused on the chemical composition of the virus, Dr. Beale's emphasis on physical structure as a determinant of viral behavior was innovative.
Dr. Beale's work laid the foundation for subsequent research into viral morphology and its impact on plant diseases. Her insights have led to a deeper understanding of how viruses, such as TMV, interact with their hosts. The study of TMV's helical structure has since become a classic example in plant virology, illustrating the link between viral form and function.
Which of the following most accurately expresses the main idea of the passage?
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
D. The study of TMV's helical structure has limited application in the broader field of virology.
E. TMV is unique among plant viruses due to its distinctive helical structure.
Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time. Her studies revealed that these helical structures are critical for the virus's ability to infect and replicate within plant cells. She postulated that the helical form allows the virus to interact more effectively with the host cell's mechanisms, facilitating the spread of the infection through the plant's vascular system.
Most notably, Dr. Beale suggested that the helical structure of TMV played a role in the specific symptoms exhibited by infected plants. She observed that the virus's form influenced how it moved and spread within the plant tissues, leading to the characteristic patterns of discoloration. While many scientists focused on the chemical composition of the virus, Dr. Beale's emphasis on physical structure as a determinant of viral behavior was innovative.
Dr. Beale's work laid the foundation for subsequent research into viral morphology and its impact on plant diseases. Her insights have led to a deeper understanding of how viruses, such as TMV, interact with their hosts. The study of TMV's helical structure has since become a classic example in plant virology, illustrating the link between viral form and function.
Which of the following most accurately expresses the main idea of the passage?
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
D. The study of TMV's helical structure has limited application in the broader field of virology.
E. TMV is unique among plant viruses due to its distinctive helical structure.
07 Jan 2024, 15:58
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Bookmarks
Official Solution:
Dr. Helen Purdy Beale, a pioneering virologist, made a groundbreaking discovery about the Tobacco Mosaic Virus (TMV). TMV, known for causing disease in tobacco plants, forms distinctive patterns of mottling and discoloration on the leaves. Dr. Beale's work, initially met with skepticism, has been validated by later research and significantly advanced our understanding of viral structures and plant pathology.
Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time. Her studies revealed that these helical structures are critical for the virus's ability to infect and replicate within plant cells. She postulated that the helical form allows the virus to interact more effectively with the host cell's mechanisms, facilitating the spread of the infection through the plant's vascular system.
Most notably, Dr. Beale suggested that the helical structure of TMV played a role in the specific symptoms exhibited by infected plants. She observed that the virus's form influenced how it moved and spread within the plant tissues, leading to the characteristic patterns of discoloration. While many scientists focused on the chemical composition of the virus, Dr. Beale's emphasis on physical structure as a determinant of viral behavior was innovative.
Dr. Beale's work laid the foundation for subsequent research into viral morphology and its impact on plant diseases. Her insights have led to a deeper understanding of how viruses, such as TMV, interact with their hosts. The study of TMV's helical structure has since become a classic example in plant virology, illustrating the link between viral form and function.
Which of the following most accurately expresses the main idea of the passage?
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
D. The study of TMV's helical structure has limited application in the broader field of virology.
E. TMV is unique among plant viruses due to its distinctive helical structure.
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
The passage focuses on how Dr. Beale's discovery of the helical structure of TMV and its role in infection and symptom expression led to significant advancements in the understanding of viral structures and plant pathology, indicating a revolution in plant virology. This aligns with option A.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
This option is too narrow and specific. While the passage mentions that the helical structure influences the symptoms exhibited by infected plants, it does not state that this structure is solely responsible for the mottling patterns. The passage places more emphasis on the broader impact of Dr. Beale's research on the understanding of TMV and plant viruses in general.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
The reason you may like C is that it is written like a click-bait article title of today. Rejected would definitely get clicks but it is not the main point of the passage - just a cursory detail.
While it is mentioned that Dr. Beale's work was initially met with skepticism, the passage beyond the introduction does not focus on the rejection or eventual acceptance of her work by the scientific community (or any community). Instead, the remainder of the passage emphasizes her contributions to the understanding of viral structures and their effects, which makes Option C too focused on just the rejection/acceptance point rather than the content and impact of her research. The rejection is only a part of the story - if you choose option C, you are skipping much of the content of the passage.
D. The study of TMV's helical structure has limited application in the broader field of virology.
This statement is actually counter to the passage’s portrayal of Dr. Beale's work. The passage indicates that her research on TMV's helical structure significantly advanced the field and laid foundational knowledge for further studies, suggesting broad rather than limited applications.
E. TMV is unique among plant viruses due to its distinctive helical structure.
The passage does not claim that TMV's helical structure is unique among plant viruses. Rather, it focuses on how Dr. Beale’s observations about this structure helped advance the understanding of viral behaviors in plant pathology, making this option incorrect as it implies a uniqueness not discussed in the text.
Option A correctly summarizes the overarching contribution of Dr. Beale’s research to the field, encompassing both the specific findings about TMV and their broader implications for plant virology.
Answer: A
Dr. Helen Purdy Beale, a pioneering virologist, made a groundbreaking discovery about the Tobacco Mosaic Virus (TMV). TMV, known for causing disease in tobacco plants, forms distinctive patterns of mottling and discoloration on the leaves. Dr. Beale's work, initially met with skepticism, has been validated by later research and significantly advanced our understanding of viral structures and plant pathology.
Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time. Her studies revealed that these helical structures are critical for the virus's ability to infect and replicate within plant cells. She postulated that the helical form allows the virus to interact more effectively with the host cell's mechanisms, facilitating the spread of the infection through the plant's vascular system.
Most notably, Dr. Beale suggested that the helical structure of TMV played a role in the specific symptoms exhibited by infected plants. She observed that the virus's form influenced how it moved and spread within the plant tissues, leading to the characteristic patterns of discoloration. While many scientists focused on the chemical composition of the virus, Dr. Beale's emphasis on physical structure as a determinant of viral behavior was innovative.
Dr. Beale's work laid the foundation for subsequent research into viral morphology and its impact on plant diseases. Her insights have led to a deeper understanding of how viruses, such as TMV, interact with their hosts. The study of TMV's helical structure has since become a classic example in plant virology, illustrating the link between viral form and function.
Which of the following most accurately expresses the main idea of the passage?
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
D. The study of TMV's helical structure has limited application in the broader field of virology.
E. TMV is unique among plant viruses due to its distinctive helical structure.
A. Dr. Helen Purdy Beale’s research on TMV revolutionized the field of plant virology.
The passage focuses on how Dr. Beale's discovery of the helical structure of TMV and its role in infection and symptom expression led to significant advancements in the understanding of viral structures and plant pathology, indicating a revolution in plant virology. This aligns with option A.
B. The helical structure of TMV is solely responsible for the patterns of mottling in tobacco plants.
This option is too narrow and specific. While the passage mentions that the helical structure influences the symptoms exhibited by infected plants, it does not state that this structure is solely responsible for the mottling patterns. The passage places more emphasis on the broader impact of Dr. Beale's research on the understanding of TMV and plant viruses in general.
C. Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.
The reason you may like C is that it is written like a click-bait article title of today. Rejected would definitely get clicks but it is not the main point of the passage - just a cursory detail.
While it is mentioned that Dr. Beale's work was initially met with skepticism, the passage beyond the introduction does not focus on the rejection or eventual acceptance of her work by the scientific community (or any community). Instead, the remainder of the passage emphasizes her contributions to the understanding of viral structures and their effects, which makes Option C too focused on just the rejection/acceptance point rather than the content and impact of her research. The rejection is only a part of the story - if you choose option C, you are skipping much of the content of the passage.
D. The study of TMV's helical structure has limited application in the broader field of virology.
This statement is actually counter to the passage’s portrayal of Dr. Beale's work. The passage indicates that her research on TMV's helical structure significantly advanced the field and laid foundational knowledge for further studies, suggesting broad rather than limited applications.
E. TMV is unique among plant viruses due to its distinctive helical structure.
The passage does not claim that TMV's helical structure is unique among plant viruses. Rather, it focuses on how Dr. Beale’s observations about this structure helped advance the understanding of viral behaviors in plant pathology, making this option incorrect as it implies a uniqueness not discussed in the text.
Option A correctly summarizes the overarching contribution of Dr. Beale’s research to the field, encompassing both the specific findings about TMV and their broader implications for plant virology.
Answer: A
27 May 2024, 12:09
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Why is the answer not C - Dr. Beale's work on TMV was initially rejected by the scientific community but later proved essential for understanding plant viruses.?
A feels like a greater claim than than the passage makes.
A feels like a greater claim than than the passage makes.
