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.
Some terminology: The mRNA is the molecule that carries the genetic code and is decoded by ribosomes to synthesize the gene product. That makes mRNA a coding strand of nucleic acid. The nucleotide sequence of the template strand of a gene is complementary to the mRNA.