<span>A
section of DNA that is not expressed in the gene product is called
intron. The final messenger RNA molecule is called exon. Eukaryotic cells have
the enzyme to cut off the intron section to produce a continuous strand
of mRNA so that protein synthesis can occur. Prokaryotic cells can
express the information to produce protein directly as the mRNA does not
contain intron. </span>
ANSWER ——>(Skeletal muscle) fibers occur in muscles which are attached to the skeleton. They are striated in appearance and are under voluntary control.
A cell is a living structure. It is made by process of cellular reproduction. It dies because of various activities inside or outside the cell. That is why we can say that a cell has life span and it dies too.
Hope it helps ...
Answer:
it talk about the body system
