Question

What is a characteristic feature of ribosomal DNA (rDNA) in eukaryotes?

A) rDNA is typically haploid.
B) rDNA is usually triploid.
C) rDNA is typically redundant.
D) rDNA is generally deleted.

Answer 1

A characteristic feature of ribosomal DNA (rDNA) in eukaryotes is its redundancy. rDNA consists of repeating units of rRNA genes, which are responsible for encoding the RNA molecules that form the ribosome. This redundancy ensures that there is sufficient rRNA for protein synthesis in eukaryotic cells.

Step-by-step explanation:

A characteristic feature of ribosomal DNA (rDNA) in eukaryotes is that it is typically redundant. Ribosomal DNA consists of repeating units of rRNA genes, which are responsible for encoding the RNA molecules that form the ribosome, the cellular machinery for protein synthesis.

In eukaryotes, rDNA is found in multiple copies, ranging from a few hundred to thousands, and is often clustered together in specialized regions of the genome called nucleolar organizer regions (NORs). This redundancy ensures that there is sufficient rRNA to support the high demand for protein synthesis in eukaryotic cells.