Substances can move into and out of cells through the cell membrane. The three main types of movement are diffusion, osmosis and active transport. 1  1. 2  2. 3  3. 4  4.
Definition. noun. Abbreviated form for messenger ribonucleic acid, the type of RNA that codes for the chemical blueprint for a protein (during protein synthesis). Supplement. In prokaryotes, mRNA is produced by splicing a large primary transcript from a DNA sequence.
messenger RNA (mRNA) is a copy of genomic DNA that codes for a specific protein. DNA cannot leave the nucleus and enter the cytoplasm, where ribosomes make the proteins. There â¦ fore there need to be a way to get the code that's on the DNA to the ribosomes so that it can become protein. mRNA is the solution.ll cellular organisms use messenger RNA (mRNA) to carry the genetic information that directs the synthesis of proteins. In addition, some viruses use RNA instead of DNA as their genetic material; perhaps a reflection of the suggested key role of RNA in the evolutionary history of life on Earth.