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Which of the following RNAs should be most abundant in animal cell?

1. t-RNA
2. m-RNA
3. mi-RNA
4. r-RNA

Correct answer: r-RNA

Solution

rRNA is the most abundant RNA in animal cells because ribosomes are extremely numerous and each ribosome contains large amounts of rRNA. mRNA, tRNA, and miRNA are present in much smaller amounts relative to rRNA.

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