0
To identify introns and exons in a sequence, one can use bioinformatics tools that analyze the sequence for specific patterns and characteristics associated with introns and exons. These tools can identify regions with known splice sites, coding sequences, and non-coding sequences to differentiate between introns and exons. Additionally, comparing the sequence to a reference genome can help in identifying these regions accurately.
Still curious? Ask our experts.
Chat with our AI personalities
Vivi
Jordan
RafaAdd your answer:
Earn +20 pts
What is the name of the remaining pieces after introns have been cut out of RNA molecules that are spliced together?
The introns are cut out in the spliceisome and the exon portions are spliced together. A poly adenine tail is added to one end and a modified guanine cap added to the other end. Then the mRNA leaves the cell nucleus and heads for the cytoplasm and a ribosome.
What is an exon?
An exon is a coding region of a gene that is transcribed into mRNA and then translated into a protein. It contains the genetic information necessary for producing a specific part of the protein. Exons are interspersed with introns in eukaryotic genes and are ultimately spliced together during mRNA processing.
What makes premature mrna and mature mrna different?
Premature mRNA (pre-mRNA) is the initial transcript synthesized from DNA that contains non-coding sequences (introns) along with coding sequences (exons). Mature mRNA, on the other hand, is the processed and edited form of mRNA after introns are removed and exons are spliced together. This processing step occurs in the nucleus before the mRNA is exported to the cytoplasm for translation.
Why must introns be removed while the exons remain in the mRNA?
Introns are non-coding regions of the gene that do not contain instructions for making proteins. Removing introns allows only the exons, which contain coding instructions, to be translated into proteins. This process is known as RNA splicing and is essential for proper gene expression in eukaryotic cells.
What permits a single gene to code for more than one polypeptide?
Alternative splicing allows a single gene to code for multiple polypeptides. During transcription, different exons and introns can be included or excluded from the mRNA, resulting in different combinations of exons being translated into different polypeptides. This process expands the functional diversity of proteins encoded by a single gene.
