Q.5  A probe which is a molecule used to locate specific sequences in a mixture of DNA or RNA molecules could be
(a) a single stranded RNA         

(b) a single stranded DNA
(c) either RNA or DNA               

(d) can be ssDNA but not ssRNA

(c) 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.