Precursor

ARPNET is the precursor of the modern Internet.

ARPNET is the precursor of the modern Internet.

ARPNET is the precursor of the modern Internet.

ARPNET is the precursor of the modern Internet.

The mRNA produced by transcription is similar to a rough cut of a film that needs a bit of editing. A specialized nucleotide is added to the beggining of each mRNA molecule, which forms a cap. It helps the mRNA starand bind to a ribosome and prevents the strand from being broken down to fast. The end of the mRNA molecule gets a string of A nucleotides, called the tail, that helps the mRNA molecule exit the nucleus.

mRNA

The precursor to the steel drum is 'tamboo bamboo'.