How is the melting temperature of a DNA molecule related to the base composition
ID: 78936 • Letter: H
Question
How is the melting temperature of a DNA molecule related to the base composition of that DNA sequence?
A) The melting temperature decreases when there are more adenine and thymine base pairs present in the sequence.
B) The melting temperature decreases when there are more cytosine and thymine base pairs present in the sequence.
C) The melting temperature decreases when there are more adenine and guanine base pairs present in the sequence.
D) The melting temperature decreases when there are more cytosine and guanine base pairs present in the sequence.
Explanation / Answer
A - melting temp decreases when there is more adenine and thymine base in the sequnece. Note- melting tempreture depend on the hydrogen bonds like guanine and cytosine base pair are linked via triple bond thus they require increase in melting tempretue while the base pair ofadenine and thymine are jus double bond thus the melting tempreture decreases in its composition sequence .
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