The following information pertains to questions 3 and 4. The two strands of a do
ID: 96212 • Letter: T
Question
The following information pertains to questions 3 and 4. The two strands of a double-stranded DNA molecule can be separated by heating the strands. The temperature at which the strands separate is called the melting point of the DNA. A DNA molecule with a larger number of hydrogen bonds between the strands will have a higher melting point than a DNA molecule with fewer hydrogen bonds. In questions 3 and 4: A = the number of deoxyadenosine nucleotides in a DNA molecule C = the number of deoxycytidine nucleotides in a DNA molecule G = the number of deoxyguanosine nucleotides in a DNA molecule T = the number of deoxythymidine nucleotides in a DNA molecule The value of(G + C)/(A + T) (a) is equal to one if the DNA is single-stranded. (b) is equal to one is the DNA is double-stranded. (c) is larger in DNA samples having a higher melting point. (d) is lower in DNA samples having a higher melting point. (e) none of the above. The value of (A+C)/(G + T) (a) is equal toExplanation / Answer
According to chegg rules, we can answer only one questio per post.
3. The correct option is C.
The melting point of a double stranded DNA depends on the GCcontent of the DNA. IF the GC content is higher it increases the melting point since GC contains three hydrogen bonds when compared to the two bonds between A and T. So a strand with a higher melting temperature will have more GC content which will have a greater value
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