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.
A: MRNA is synthesized in transcription. During transcription, the DNA molecule unzips, and only one side serves as the template for the synthesis of the mRNA strand. Once synthesized, the mRNA molecule exits the nucleus and proceeds to the ribosomes for translation, or the making of a protein. Continue Reading