When DNAs from two different organisms are incubated together,some duplexes are formed by DNA strands from the two species.What indicates that such duplexes are less stable than those between strands from the same organism?
A)Heterogeneous duplexes melt at lower temperatures than homogeneous duplexes.
B)Heterogeneous duplexes melt at higher temperatures than homogeneous duplexes.
C)Heterogeneous duplexes are degraded faster.
D)Heterogeneous duplexes are degraded more slowly.
E)There is no difference in stability between homogeneous and heterogeneous duplexes.

Question

Quizplus · Accepted Answer

Heterogeneous duplexes, formed by DNA strands from two different organisms, typically have mismatches and structural inconsistencies that make them less stable than homogeneous duplexes formed by strands from the same organism. This results in lower melting temperatures for the heterogeneous duplexes, indicating lower stability. Choice A is the only option that reflects this phenomenon.

When DNAs from Two Different Organisms Are Incubated Together,some Duplexes