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Choose the correct answer from the alternatives given:
Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on
(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.
(ii) Chargaffs base equivalence rule.
(iii) Griffiths transformation experiment.
(iv) Meselson and Stahls experiment.
Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on
(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.
(ii) Chargaffs base equivalence rule.
(iii) Griffiths transformation experiment.
(iv) Meselson and Stahls experiment.
- a)(i), (ii) and (iv)
- b)(i) and (ii)
- c)(iii) and (iv)
- d)(i), (ii), (iii) and (iv)
Correct answer is option 'B'. Can you explain this answer?
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Choose the correct answer from the alternatives given:Watson and Crick...
In 1953, James Watson and Francis Crick based on the X-ray diffraction data produced by Maurice Wilkins and Rosalind Franklin, proposed double helix model for the structure of DNA. One of the hallmarks of their proposition was base pairing between two strands of polynucleotide chains. However, this proportion was also based on the observation of Erwin Chargaff (1950) that for a double stranded DNA, the ratios between Adenine and Thymine and Guanine and Cytosine are constant and equals one.
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Choose the correct answer from the alternatives given:Watson and Crick...
Explanation:
Watson and Crick's DNA Double Helix Model:
In 1953, James Watson and Francis Crick proposed the DNA double helix model, which is the now widely accepted model for the structure of DNA. Their model was based on several key pieces of information and findings from other scientists.
Basis of Watson and Crick's Model:
The basis of Watson and Crick's model of DNA was the combination of two important pieces of information:
1. X-ray diffraction studies of DNA done by Wilkins and Franklin:
Rosalind Franklin and Maurice Wilkins conducted X-ray diffraction studies on DNA, which provided crucial insights into its structure. Franklin's X-ray diffraction images, especially Photo 51, revealed the presence of a helical structure and the measurements of the angles of the diffraction patterns suggested a helical structure with a repeating pattern. Watson and Crick used this information to develop their model.
2. Chargaff's base equivalence rule:
Erwin Chargaff discovered that the amounts of adenine (A) and thymine (T) are equal in DNA, and the amounts of guanine (G) and cytosine (C) are also equal. This became known as Chargaff's base equivalence rule. Watson and Crick incorporated this rule into their model, suggesting that A pairs with T and G pairs with C, forming complementary base pairs.
Exclusions:
The other two options mentioned in the question, Griffith's transformation experiment and Meselson and Stahl's experiment, are not directly related to the basis of Watson and Crick's model.
- Griffith's transformation experiment:
Griffith's transformation experiment, conducted by Frederick Griffith in 1928, demonstrated the transfer of genetic material between bacterial cells. This experiment was important in establishing the concept of the genetic transformation, but it was not directly related to the development of Watson and Crick's model.
- Meselson and Stahl's experiment:
Meselson and Stahl's experiment, conducted in 1958, provided evidence for the semi-conservative replication of DNA. This experiment helped to support Watson and Crick's model, but it was not the basis of their model.
In conclusion:
Based on the given options, the correct answer is option B, (i) and (ii). Watson and Crick's model of the DNA double helix was based on X-ray diffraction studies of DNA done by Wilkins and Franklin, as well as Chargaff's base equivalence rule.
Watson and Crick's DNA Double Helix Model:
In 1953, James Watson and Francis Crick proposed the DNA double helix model, which is the now widely accepted model for the structure of DNA. Their model was based on several key pieces of information and findings from other scientists.
Basis of Watson and Crick's Model:
The basis of Watson and Crick's model of DNA was the combination of two important pieces of information:
1. X-ray diffraction studies of DNA done by Wilkins and Franklin:
Rosalind Franklin and Maurice Wilkins conducted X-ray diffraction studies on DNA, which provided crucial insights into its structure. Franklin's X-ray diffraction images, especially Photo 51, revealed the presence of a helical structure and the measurements of the angles of the diffraction patterns suggested a helical structure with a repeating pattern. Watson and Crick used this information to develop their model.
2. Chargaff's base equivalence rule:
Erwin Chargaff discovered that the amounts of adenine (A) and thymine (T) are equal in DNA, and the amounts of guanine (G) and cytosine (C) are also equal. This became known as Chargaff's base equivalence rule. Watson and Crick incorporated this rule into their model, suggesting that A pairs with T and G pairs with C, forming complementary base pairs.
Exclusions:
The other two options mentioned in the question, Griffith's transformation experiment and Meselson and Stahl's experiment, are not directly related to the basis of Watson and Crick's model.
- Griffith's transformation experiment:
Griffith's transformation experiment, conducted by Frederick Griffith in 1928, demonstrated the transfer of genetic material between bacterial cells. This experiment was important in establishing the concept of the genetic transformation, but it was not directly related to the development of Watson and Crick's model.
- Meselson and Stahl's experiment:
Meselson and Stahl's experiment, conducted in 1958, provided evidence for the semi-conservative replication of DNA. This experiment helped to support Watson and Crick's model, but it was not the basis of their model.
In conclusion:
Based on the given options, the correct answer is option B, (i) and (ii). Watson and Crick's model of the DNA double helix was based on X-ray diffraction studies of DNA done by Wilkins and Franklin, as well as Chargaff's base equivalence rule.
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Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer?
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Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer?.
Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Choose the correct answer from the alternatives given:Watson and Crick (1953) proposed DNA double helix model and won the Nobel Prize; their model of DNA was based on(i) X-ray diffraction studies of DNA done by Wilkins and Franklin.(ii) Chargaffs base equivalence rule.(iii) Griffiths transformation experiment.(iv) Meselson and Stahls experiment.a)(i), (ii) and (iv)b)(i) and (ii)c)(iii) and (iv)d)(i), (ii), (iii) and (iv)Correct answer is option 'B'. Can you explain this answer?.
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