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In the laboratory, heat can be applied in order to cause DNA to undergo a transi

ID: 896075 • Letter: I

Question

In the laboratory, heat can be applied in order to cause DNA to undergo a transition from a highly ordered double helix to less ordered single strands. The temperature at which this transition occurs is often described as the melting temperature, or Tm. Which statement best describes what is happening during the "melting" reaction shown below?

choose an answer below

In the absence of added heat, the melting reaction is non-spontaneous because the resulting decrease in entropy of the system is greater than the resulting increase in entropy of the surroundings.

In the absence of added heat, the melting reaction is non-spontaneous because the resulting decrease in entropy of the surroundings is greater than the resulting increase in entropy of the system.

In the absence of added heat, the melting reaction is non-spontaneous because of the resulting decrease in entropy of the system and the resulting decrease in entropy of the surroundings.

A.

In the absence of added heat, the melting reaction is non-spontaneous because the resulting decrease in entropy of the system is greater than the resulting increase in entropy of the surroundings.

B.

In the absence of added heat, the melting reaction is non-spontaneous because the resulting decrease in entropy of the surroundings is greater than the resulting increase in entropy of the system.

C.

In the absence of added heat, the melting reaction is non-spontaneous because of the resulting decrease in entropy of the system and the resulting decrease in entropy of the surroundings.

Explanation / Answer

option A is correct

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