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# Long description

An illustrated workflow shows DNA/RNA extraction using silica gel spin columns, arranged left to right as a sequence of microcentrifuge tubes with arrows between each step.

On the far left, a tube labelled ‘add lysis buffer to patient sample’ contains blue liquid with small, circular, orange particles. The next tube is labelled ‘lysate’ and shows a uniform orange solution. The following tube is labelled ‘bind DNA/RNA’, with orange liquid added to a white spin column insert. A tube labelled ‘DNA/RNA’ appears after centrifuge, showing dark, coiled DNA/RNA strands retained in the column and orange liquid in the lower tube. Next, a pipette dispenses blue liquid into the column labelled ‘wash buffer’, followed by another tube after centrifuge, with the dark DNA/RNA strands still visible in the column and blue liquid in the lower tube. A second pipette adds blue liquid labelled ‘elution buffer’, followed by another centrifuge step. On the far right, a final tube contains blue liquid with dark DNA/RNA strands at the bottom, with a double-helix icon below and text reading ‘ready to use purified DNA/RNA’.