The genomes of most animals contain multiple identical copies of genes for rRNAs
A) to allow pseudogenes to evolve.
B) so that the genes can take on different functions.
C) because transcription is too slow to supply the needs for the cell.
D) because transcription is so fast that lots of these genes are required.
E) to produce short tandem repeats.

Question

Quizplus · Accepted Answer

The need for multiple copies of rRNA genes in most animal genomes is primarily because transcription of a single copy would be too slow to meet the cellular demand for ribosomal RNA, which is essential for protein synthesis.

The Genomes of Most Animals Contain Multiple Identical Copies of Genes