Question

Which of the following statements about ribosomes and ribosomal RNA is NOT true?

1) Ribosomes typically contain about 80
2) Ribosomal RNA is processed in both prokaryotes and eukaryotes.
3) In eukaryotes, genes for rRNA are usually present within tandem repeats.
4) Each ribosomal RNA component is encoded by separate gene.
5) In eukaryotes, the rRNA transcripts are processed further by snoRNAs within the nucleus.

Answer 1

The statement that is NOT true is number 4) Each ribosomal RNA component is encoded by separate gene.

Step-by-step explanation:

The statement that is NOT true is number 4) Each ribosomal RNA component is encoded by separate gene.

Each ribosomal RNA component is not encoded by a separate gene. In fact, in both prokaryotes and eukaryotes, the genes for rRNA are present within tandem repeats. In eukaryotes, a large rRNA gene transcribes a precursor transcript containing 5.8S rRNA, 18SrRNA, and 28S rRNA. These rRNA molecules, in association with proteins, form the ribosomes. The rRNA is single stranded with intra-chain hydrogen bonding.