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.
Finally, the mRNA is degraded. Messenger RNA (mRNA) is a large family of RNA molecules that convey genetic information from DNA to the ribosome, where they specify the amino acid sequence of the protein products of gene expression.