There are a number of unique features to eukaryotic pre-mrna splicing. select all that apply. a. introns are thought to encode specific subunits of proteins. b. introns likely slow down gene expression. c. introns need to be removed precisely to prevent mutations. d. there are often multiple introns in a gene.

Option (A), (C) and (D).

Explanation:

Introns are the non coding nucleotide sequence of the gene. They may present within the gene or may lie outside the exons. Introns are responsible for the gene evolution.

Introns can also responsible for encoding the proteins subunit. Introns needs to be removed from the exons by the process known as splicing. Different splicing are alternate splice, group I and II intron. Different multiple introns can be present in the gene.

Thus, the correct option is (A), (C) and (D).