Keeping oxygenated and deoxygenated blood separate
The interventricular or ventricular septum is located at the mid-portion of the heart. It is responsible for keeping the oxygenated blood from the left portion of the heart from the deoxygenated blood from the right portion of the heart from mixing and combining together. It helps to secure the heart and increase the pushing of the red blood cells to the other valves.
Sets of transcription factor proteins buying a specific DNA sequences in or near a gene and promote or repress its transcription into RNA. Which i believe its C