In eukaryotic cells, mRNA must be ___________ before it is ___________ into protein. In this process ___________ sequences are removed from the mRNA and ___________ are joined. A complex called the ___________ performs this process.

Verified step by step guidance

1. Identify the process that modifies eukaryotic mRNA before it is translated into protein. This process is called RNA splicing.
2. Understand that during RNA splicing, non-coding sequences called introns are removed from the pre-mRNA.
3. Recognize that the remaining coding sequences, called exons, are joined together to form the mature mRNA.
4. Note that this mature mRNA is then ready to be translated into protein by the ribosome.
5. Know that the complex responsible for carrying out RNA splicing is called the spliceosome.

Key Concepts

mRNA Processing in Eukaryotes

In eukaryotic cells, the initial mRNA transcript (pre-mRNA) undergoes processing before translation. This includes modifications such as 5' capping, 3' polyadenylation, and splicing, which prepare the mRNA for stability, export from the nucleus, and efficient translation into protein.

Introns and Exons

Eukaryotic genes contain coding regions called exons and non-coding regions called introns. During mRNA processing, introns are removed, and exons are joined together to form a continuous coding sequence that can be translated into a functional protein.

Spliceosome

The spliceosome is a large RNA-protein complex responsible for removing introns from pre-mRNA and joining exons. It recognizes specific nucleotide sequences at intron-exon boundaries and catalyzes the splicing reaction, ensuring accurate mRNA maturation.