Final answer:
The ribonucleic acid (RNA) components present in eukaryotic ribosomes are the 5.8S, 18S, 28S, and 5S rRNAs. These rRNAs are involved in protein synthesis and have specific sedimentation coefficients. They are single-stranded molecules with intra-chain hydrogen bonding.
Step-by-step explanation:
The ribonucleic acid (RNA) components known to exist in eukaryotic ribosomes are 5.8S, 18S, 28S, and 5S. These components are part of the ribosomal RNA (rRNA) molecules that form the ribosome, the cellular structure responsible for protein synthesis. In eukaryotes, rRNAs are designated based on their sedimentation coefficients and are single stranded with intra-chain hydrogen bonding.