Skip to content
Skip to main content

About this free course

Download this course

Share this free course

What do genes do?
What do genes do?

Start this free course now. Just create an account and sign in. Enrol and complete the course for a free statement of participation or digital badge if available.

3 The flow of information from DNA to RNA to protein

The information flow from DNA to protein is more complex than shown in Figure 1. The genetic information encoded within the DNA of a gene is carried via an intermediary molecule, RNA (ribonucleic acid). Information within a cell can therefore be seen as passing from DNA, via RNA, to a protein. This flow of information can be expressed in another way.

DNA makes RNA makes protein.

This statement implies that there are two separate steps in this information flow: from DNA to RNA and from RNA to protein; these are called, respectively, transcription and translation. Transcription of DNA produces RNA and the subsequent translation of this RNA produces proteins. These steps are summarized in Figure 2 (also click on the link to the video clip below).

Figure 2
Figure 2 Information flow from DNA to RNA to protein.

Video: Click to view clip from DNA to RNA to protein

Download this video clip.Video player: sk195_3_002v.mp4
Interactive feature not available in single page view (see it in standard view).