IIT JAM Exam > IIT JAM Questions > In a double stranded DNA, which of the follow...
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In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases.
- a)(A+T)/(G+C)
- b)(A+G)/(T+C)
- c)A/G
- d)(G+T)/(A+C)
Correct answer is option 'B,D'. Can you explain this answer?
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Explanation:
In a double-stranded DNA molecule, the number of adenine (A) bases is always equal to the number of thymine (T) bases, and the number of guanine (G) bases is always equal to the number of cytosine (C) bases. This is due to complementary base pairing, where A always pairs with T and G always pairs with C.
Let's analyze the given options to determine which ratios are always equal to 1.
Option A: (A T)/(G C)
The ratio of A to T bases is always 1, as they always pair with each other. However, the ratio of G to C bases can vary. Therefore, option A is not always equal to 1.
Option B: (A G)/(T C)
The ratio of A to G bases can vary, as well as the ratio of T to C bases. Therefore, option B is not always equal to 1.
Option C: A/G
The ratio of A to G bases can vary. Therefore, option C is not always equal to 1.
Option D: (G T)/(A C)
The ratio of G to T bases is always 1, as they always pair with each other. Similarly, the ratio of A to C bases is always 1. Therefore, option D is always equal to 1.
Conclusion:
The ratios that are always equal to 1 in a double-stranded DNA molecule are option D: (G T)/(A C). This is because the complementary base pairing ensures that the number of G bases is always equal to the number of T bases, and the number of A bases is always equal to the number of C bases.
In a double-stranded DNA molecule, the number of adenine (A) bases is always equal to the number of thymine (T) bases, and the number of guanine (G) bases is always equal to the number of cytosine (C) bases. This is due to complementary base pairing, where A always pairs with T and G always pairs with C.
Let's analyze the given options to determine which ratios are always equal to 1.
Option A: (A T)/(G C)
The ratio of A to T bases is always 1, as they always pair with each other. However, the ratio of G to C bases can vary. Therefore, option A is not always equal to 1.
Option B: (A G)/(T C)
The ratio of A to G bases can vary, as well as the ratio of T to C bases. Therefore, option B is not always equal to 1.
Option C: A/G
The ratio of A to G bases can vary. Therefore, option C is not always equal to 1.
Option D: (G T)/(A C)
The ratio of G to T bases is always 1, as they always pair with each other. Similarly, the ratio of A to C bases is always 1. Therefore, option D is always equal to 1.
Conclusion:
The ratios that are always equal to 1 in a double-stranded DNA molecule are option D: (G T)/(A C). This is because the complementary base pairing ensures that the number of G bases is always equal to the number of T bases, and the number of A bases is always equal to the number of C bases.
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In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases.a)(A+T)/(G+C)b)(A+G)/(T+C)c)A/Gd)(G+T)/(A+C)Correct answer is option 'B,D'. Can you explain this answer?
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In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases.a)(A+T)/(G+C)b)(A+G)/(T+C)c)A/Gd)(G+T)/(A+C)Correct answer is option 'B,D'. Can you explain this answer? for IIT JAM 2024 is part of IIT JAM preparation. The Question and answers have been prepared according to the IIT JAM exam syllabus. Information about In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases.a)(A+T)/(G+C)b)(A+G)/(T+C)c)A/Gd)(G+T)/(A+C)Correct answer is option 'B,D'. Can you explain this answer? covers all topics & solutions for IIT JAM 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases.a)(A+T)/(G+C)b)(A+G)/(T+C)c)A/Gd)(G+T)/(A+C)Correct answer is option 'B,D'. Can you explain this answer?.
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