23.4 MB (3.3 MB compressed)
3443 x 2375 pixels
29.2 x 20.1 cm ⏐ 11.5 x 7.9 in (300dpi)
BIOLOGY PICS / SCIENCE PHOTO LIBRARY BIOLOGY PICS / SCIENCE PHOTO LIBRARY
Transmission electron micrograph (TEM) of a plasmid (strand in green) from a bacteriophage. Plasmids are symbiotic pieces of DNA (deoxyribonucleic acid) that occur in bacteria and yeast. They are separate from the main chromosome, replicate independently, and can be transferred from one cell to another, carrying genes with them.
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