Total nucleic acids are extracted from a culture of yeast 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
(d) mRNA
(d) mRNA is the only type of RNA that is polyadenylated, and its poly-A tail would be able to base-pair with the strands of poly T on the beads and thus stick to them. DNA would not be found in the sample, because the poly-A tail is not encoded in the DNA and long runs of T are rare in DNA.
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1.primary producer 2.primary consumer 3.secondary consumer 4.tertiary consumer
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Fill in the blank(s) with the appropriate word(s).