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Total nucleic acids are extracted from a culture of animal cells and are then mixed with resin beads to which the polynucleotide 5′-TTTTTTTTTTTTTTTTTTTTTTTTT-3′ has been covalently attached. After a short incubation, the beads are then extracted from the mixture. When you analyze the cellular nucleic acids that have stuck to the beads, which of the following is most abundant?A. DNA.
B. tRNA.
C. rRNA. (it is not this one, I put this and it was wrong.)
D. mRNA.
E. Primary transcript RNA.

Respuesta :

Answer:

D.  mRNA.

Explanation:

1. It is mRNA because it is the only type of RNA that is polyadenylated and the poly (A) tail at the 3' end of it.

2. It would be able to base pair with the strands of poly(T) on the beads by base pairing, and it can stick to poly (T) on the beasd.

3. DNA would not be found in the sample, as the poly (A) tail is not encoded in the DNA and long runs of T are rare in DNA.

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