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07 Jan 2024, 16:01
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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.
The passage most strongly supports which of the following inferences about the helical structure of TMV?
A. Dr. Beale was the first to discover the helical structure of TMV.
B. The helical structure of TMV is not found in all plant viruses.
C. In TMV, the helical structure contributes to the virus's infectivity and symptom expression.
D. The helical structure of TMV is unrelated to the virus's ability to cause disease in plants.
E. Dr. Beale’s research disproved earlier theories about the physical structure of TMV.
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.
The passage most strongly supports which of the following inferences about the helical structure of TMV?
A. Dr. Beale was the first to discover the helical structure of TMV.
B. The helical structure of TMV is not found in all plant viruses.
C. In TMV, the helical structure contributes to the virus's infectivity and symptom expression.
D. The helical structure of TMV is unrelated to the virus's ability to cause disease in plants.
E. Dr. Beale’s research disproved earlier theories about the physical structure of TMV.
07 Jan 2024, 16:01
Kudos
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.
The passage most strongly supports which of the following inferences about the helical structure of TMV?
A. Dr. Beale was the first to discover the helical structure of TMV.
B. The helical structure of TMV is not found in all plant viruses.
C. In TMV, the helical structure contributes to the virus's infectivity and symptom expression.
D. The helical structure of TMV is unrelated to the virus's ability to cause disease in plants.
E. Dr. Beale’s research disproved earlier theories about the physical structure of TMV.
The passage details Dr. Beale's observation that TMV's helical structure is critical for its ability to infect and replicate within plant cells, and this structural form influences how the virus spreads within the plant, leading to the characteristic symptoms. This supports the inference in option C.
Answer: C
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.
The passage most strongly supports which of the following inferences about the helical structure of TMV?
A. Dr. Beale was the first to discover the helical structure of TMV.
B. The helical structure of TMV is not found in all plant viruses.
C. In TMV, the helical structure contributes to the virus's infectivity and symptom expression.
D. The helical structure of TMV is unrelated to the virus's ability to cause disease in plants.
E. Dr. Beale’s research disproved earlier theories about the physical structure of TMV.
The passage details Dr. Beale's observation that TMV's helical structure is critical for its ability to infect and replicate within plant cells, and this structural form influences how the virus spreads within the plant, leading to the characteristic symptoms. This supports the inference in option C.
Answer: C
30 Aug 2024, 06:52
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Why is A not the answer?- Dr. Beale was the first to discover the helical structure of TMV.
Doesn't the passage say that she found the helical structure?- Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time.
Doesn't the passage say that she found the helical structure?- Dr. Beale observed that TMV particles form helical structures, a feature not widely accepted or understood at the time.
