A probe which is a molecule used to locate specific sequences in a mixture of DNA or RNA molecules could be:

A single stranded RNA

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A single stranded DNA

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Either single stranded RNA or DNA

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Can be single stranded DNA but not RNA

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Solution

The correct option is C Either single stranded RNA or DNA
A probe is a single stranded DNA or RNA tagged with a radioactive molecule. It is used to detect the complementary sequences by hybridisation techniques.

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