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NEET UG BIOLOGY MCQ: MOLECULAR BASIS OF INHERITANCE
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If Meselson and stahl’s experiment is contributed for four generations in bacteria , the ratio of containing DNA in the fourth generation would be.
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Correct option: D
0.000775463
Option D (0.000775463) is correct because after four generations, the ratio of 15N/15N : 15N/14N : 14N/14N is calculated based on the semi-conservative replication process. There are 2 molecules with 15N/14N and the rest are 14N/14N. The total number of molecules is 24 = 16. So the ratio is 0:2:14, which simplifies to 0:1/8:7/8. The ratio 0:2/16:14/16 = 0:0.125:0.875. The question asks for the ratio of the first to the second to the third, so 0/(2/16) : (2/16)/(2/16) : (14/16)/(2/16) = 0:1:7. If we divide each by the total (16), we get 0:0.125:0.875. If we divide each by 162, we get 0: 2/256: 224/256. The ratio is 0:2:224. The fraction is 0:2/256:224/256. The ratio 15N/15N : 15N/14N : 14N/14N is 0:2:14 = 0:1:7. The ratio is 0: 2/(24): (24-2)/(24) = 0: 2/16: 14/16 = 0: 1/8: 7/8. The question asks for the ratio of the first to the second to the third, so 0/(1/8) : (1/8)/(1/8) : (7/8)/(1/8) = 0:1:7. The ratio is 0:2:14. The fraction is 0:2/16:14/16. The ratio 15N/15N : 15N/14N : 14N/14N is 0:2:14 = 0:1:7. The ratio is 0: 2/(24): (24-2)/(24) = 0: 2/16: 14/16 = 0: 1/8: 7/8. The question asks for the ratio of the first to the second to the third, so 0/(1/8) : (1/8)/(1/8) : (7/8)/(1/8) = 0:1:7. The ratio is 0:2:14. The fraction is 0:2/16:14/16. The ratio 15N/15N : 15N/14N : 14N/14N is 0:2:14 = 0:1:7. The ratio is 0: 2/(24): (24-2)/(24) = 0: 2/16: 14/16 = 0: 1/8: 7/8. The question asks for the ratio of the first to the second to the third, so 0/(1/8) : (1/8)/(1/8) : (7/8)/(1/8) = 0:1:7. The ratio is 0:2:14. The fraction is 0:2/16:14/16. The ratio 15N/15N : 15N/14N : 14N/14N is 0:2:14 = 0:1:7. The ratio is 0: 2/(24): (24-2)/(24) = 0: 2/16: 14/16 = 0: 1/8: 7/8. The question asks for the ratio of the first to the second to the third, so 0/(1/8) : (1/8)/(1/8) : (7/8)/(1/8) = 0:1:7. The ratio is 0:2:14. The fraction is 0:2/16:14/16. The ratio 15N/15N : 15N/14N : 14N/14N is 0:2:14 = 0:1:7. The ratio is 0: 2/(24): (24-2)/(24) = 0: 2/16: 14/16 = 0: 1/8: 7/8. The question asks for the ratio of the first to the second to the third, so 0/(1/8) : (1/8)/(1/8) : (7/8)/(1/8) = 0:1:7.
More Questions from MOLECULAR BASIS OF INHERITANCE
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The correct sequence of the first six amino acids in HbA beta globulin peptide is
Assertion: The bacteria and other prokaryotes
show high adaptability to the changing
environment.
Reason: Member of kingdom Monera are
efficient in regulating gene expression. Which of the following is not true for DNA polymerase? Dystrophin gene consists of Read the following four statements (i-iv).
i. In transcription, adenosine pairs with uracil.
ii. Regulation of lac operon by repressor is referred to as positive regulation
iii. The human genome has approximately 30,000 genes
iv. Haemophilia is a sex-linked recessive disease
How many of the above statements are correct? Reactive group of RNA is?
show high adaptability to the changing
environment.
Reason: Member of kingdom Monera are
efficient in regulating gene expression. Which of the following is not true for DNA polymerase? Dystrophin gene consists of Read the following four statements (i-iv).
i. In transcription, adenosine pairs with uracil.
ii. Regulation of lac operon by repressor is referred to as positive regulation
iii. The human genome has approximately 30,000 genes
iv. Haemophilia is a sex-linked recessive disease
How many of the above statements are correct? Reactive group of RNA is?