Multiple choice

Which probe is used in recombinant DNA technology and molecular diagnosis?

  1. A short, double or single-stranded DNA or RNA tagged with radioactive molecule to detect the product enzyme

  2. A short mRNA strand tagged with radioactive molecule to detect the codon sequence

  3. A short DNA strand tagged with radioactive molecule for identifying the coding and template strands

  4. A short, single-stranded DNA or RNA tagged with radioactive molecule to detect the complimentary strand

  5. A short, double DNA tagged with radioactive thimidine for recognising its corresponding complementary strand
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A short, single-stranded DNA or RNA tagged with radioactive molecule to detect the complementary strand is called probe. A short, double DNA tagged with radioactive thimidine for recognising its corresponding complementary strand is not a probe. 

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