LAGUNA DESIGN / SCIENCE PHOTO LIBRARY LAGUNA DESIGN / SCIENCE PHOTO LIBRARY
Transcription. Molecular model of DNA (deoxyribonucleic acid, upper right) transcription. During transcription, a complementary messenger ribonucleic acid (mRNA) strand (bottom left) is synthesised. The enzyme RNA polymerase (not shown) recognises a start sign on the DNA strand and moves along the strand building the mRNA. DNA and its protein product.
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