Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 22.7 % thymine and sample B contains 29.1 % thymine. Assume the organisms contain normal double‑stranded DNA and predict the composition of the other bases. percent adenine in sample A: %A percent guanine in sample A: %G percent cytosine in sample A: %C percent adenine in sample B: %A percent guanine in sample B: %G percent cytosine in sample B: %C Both samples are then denatured to remove the secondary structure. Which will have the higher temperature to denature? A or B?
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Step 1: Calculate the composition of adenine, guanine, cytosine in sample A. Show more…
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Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 18.3% thymine and sample B contains 30.9% thymine. Assume the organisms contain normal double-stranded DNA and predict the composition of the other bases. percent adenine in sample A: _____%A percent guanine in sample A: _____%G percent cytosine in sample A: _____%C percent adenine in sample B: _____%A percent guanine in sample B: _____%G percent cytosine in sample B: _____%C Both samples are then denatured to remove the secondary structure. Which will have the higher temperature to denature? A B
Joanna Q.
Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 17.7% thymine and sample B contains 29.1% thymine. Assume the organisms contain normal double-stranded DNA and predict the composition of the other bases. percent adenine in sample A: %A percent guanine in sample A: %G percent cytosine in sample A: %C percent adenine in sample B: %A percent guanine in sample B: %G percent cytosine in sample B: %C Both samples are then denatured to remove the secondary structure. Which will have the higher temperature to denature?
Shakti R.
A segment of DNA in an individual may differ at several nucleotide positions from a corresponding DNA segment in another individual. For instance, one individual may have the sequence $\ldots . A \ldots G \ldots C \ldots$ and another individual may have the sequence $\ldots \mathrm{T} \ldots \mathrm{A} \ldots \mathrm{A} \ldots .$ These two DNA segments differ in three nucleotide positions. Because the nucleotides within each segment are tightly linked, they will tend to be inherited together as a unit, that is, without being scrambled by recombination. We call such heritable units DNA haplotypes. Through sampling and DNA sequencing, researchers can determine which DNA haplotypes are present in a particular population. When this kind of analysis is performed on human populations by sequencing, for example, a segment of mitochondrial DNA, it is found that samples from Africa exhibit more haplotype diversity than samples from other continents. What does this observation tell us about human evolution?
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