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Answers
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Gene Splicing
Gene SplicingThe mRNA is composed of sequences known as introns and exons. The introns do not code for any protein and are removed from the mRNA before it is made into protein. The exons are the sequences that code for protein. However, some exons are removed from the mRNA as well and do not get made into protein.
A regulator gene, regulator, or regulatory gene is a gene involved in controlling the expression of one or more other genes. Regulatory sequences, which encode regulatory genes, are often at the five prime end (5') to the start site of transcription of the gene they regulate. In addition, these sequences can also be found at the three prime end (3') to the transcription start site. In both cases, whether the regulatory sequence occurs before (5') or after (3') the gene it regulates, the sequence is often many kilobases away from the transcription start site. A regulator gene may encode a protein, or it may work at the level of RNA, as in the case of genes encoding microRNAs. An example of a regulator gene is a gene that codes for a repressor protein that inhibits the activity of an operator (a gene which binds repressor proteins thus inhibiting the translation of RNA to protein via RNA polymerase).[
Answer:
Gene Splicing
The mRNA is composed of sequences known as introns and exons. The introns do not code for any protein and are removed from the mRNA before it is made into protein. The exons are the sequences that code for protein. However, some exons are removed from the mRNA as well and do not get made into protein.
A regulatory sequence is a segment of a nucleic acid molecule which is capable of increasing or decreasing the expression of specific genes within an organism. Regulation of gene expression is an essential feature of all living organisms and viruses.
Regulatory gene. A gene that is involved in the production of a substance that controls or regulates the expression of one or more genes, such as the gene that codes for a repressor protein that inhibits the activity of an operator gene.
Depending on the segments which are removed, several mRNAs can result from the same pre-mRNA sequence. This has led scientists to estimate that 70% of our genes code for at least 4 proteins each
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