Rope Micrograph (IMAGE) Penn State Caption A micrograph of rope shows DNA, bacteria and archaea. Blue filaments are DNA strands. Green fluorescent dyed bactera, red to pink archaea. fluorescent probes label ribosomes, which are only visible when the cells are metabolizing. Credit Penn State Usage Restrictions Non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.